FINAL TEST AT LABORATORY
Study of the diffusion in gaseous state and molecular speeds

1. The fog observed during the experiment is due to:
   1. presence of the ammonia;
   2. unproper illumination in the laboratory or our breathing;
   3. our experiment designed to trap the product of the reaction;
   4. formation of ammonium chloride;
   
   
2. The chronometer is used in the experiment for:
   1. measuring of the diffusion time;
   2. extracting the information necessary to calculate the diffusion coefficients;
   3. indication of the moment when we should pay attention to the experiment;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
3. The time to the formation of the ring in the experiment is dependent on:
   1. the length of the tube and not of the width of the tube;
   2. the average energy or average speed of each involved species;
   3. the propagation of the species as neutral molecules and not as ions;
   4. the speed of diffusion of each involved species;
   
   
4. The position of the ring in the experiment is dependent on:
   1. the length of the tube and the width of the tube;
   2. the propagation of the species as ions and not as neutral molecules;
   3. the real speeds and not the virtual speeds of each involved species;
   4. the mode energy or mode speed of each involved species;
   
   
5. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all are moving in an arbitrary direction;
   2. all are moving in the same direction;
   3. are considered to be at the same temperature, but may have different energies;
   4. all have same energy;
   
   

TEST DE FINAL DE LABORATOR
Studiul difuziei in stare gazoasa si a vitezelor moleculare

1. Ceata observata īn timpul experimentului se datoreaza:
   1. prezentei amoniacului;
   2. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   3. experimentului nostru proiectat pentru a captura produsul de reactie;
   4. formarea clorurii de amoniu;
   5. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   
   
2. Cronometrul este utilizat īn experimentul pentru:
   1. masurarea timpului de difuzie;
   2. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   3. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   5. sincronizarea timpilor de difuzie;
   
   
3. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si nu latimea tubului;
   2. energia medie sau viteza medie a fiecarei specii implicate;
   3. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   4. viteza de difuzie a fiecarei specii implicate;
   
   
4. Pozitia inelului īn experimentul este dependenta de:
   1. lungimea tubului si latimea tubului;
   2. propagarea speciilor ca ionii si nu ca si molecule neutre;
   3. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   4. viteza la moda sau energia la moda a fiecarei specii implicate;
   
   
5. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate se īndreapta īntr-o directie arbitrara;
   2. toate se deplaseaza īn aceeasi directie;
   3. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   4. toate au aceeasi energie;
   
   

FINAL TEST AT LABORATORY
Study of the diffusion in gaseous state and molecular speeds

1. We may say the followings:
   1. the molecules have energy only in gaseous state;
   2. the molecules have speeds in all gaseous, liquid and solid states;
   3. the molecules have speeds only in gaseous and liquid states;
   4. the molecules have energy in all gaseous, liquid and solid states;
   
   
2. The time to the formation of the ring in the experiment is dependent on:
   1. the length of the tube and the width of the tube;
   2. the virtual speeds and not the real speeds of each involved species;
   3. the concentrations of the solutions used;
   4. the speed of diffusion of each involved species;
   
   
3. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + HCl \=\ NH₄Cl
   2. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
4. The fog observed during the experiment is due to:
   1. our experiment designed to trap the product of the reaction;
   2. formation of ammonium chloride;
   3. presence of the ammonia;
   4. presence of the chlorine;
   
   
5. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the diffusion coefficients;
   2. measuring of the diffusion time;
   3. extracting the information necessary to calculate the speeds ratio;
   4. indication of the moment when we should pay attention to the experiment;
   
   

TEST DE FINAL DE LABORATOR
Studiul difuziei in stare gazoasa si a vitezelor moleculare

1. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au energie numai īn stare gazoasa;
   2. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   3. moleculele au viteze numai īn stare gazoasa si lichida;
   4. moleculele au energie īn toate starile gazoasa, lichida si solida;
   5. energia cinetica a unei molecule este afectata de numai temperatura;
   
   
2. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si latimea tubului;
   2. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   3. concentratiile solutiilor utilizate;
   4. viteza de difuzie a fiecarei specii implicate;
   
   
3. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + HCl \=\ NH₄Cl
   2. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   5. H⁺ + HO^- \=\ H₂O
   
   
4. Ceata observata īn timpul experimentului se datoreaza:
   1. experimentului nostru proiectat pentru a captura produsul de reactie;
   2. formarea clorurii de amoniu;
   3. prezentei amoniacului;
   4. prezentei clorului;
   
   
5. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   2. masurarea timpului de difuzie;
   3. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   4. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   
   

FINAL TEST AT LABORATORY
Study of the diffusion in gaseous state and molecular speeds

1. The position of the ring in the experiment is dependent on:
   1. the length of the tube and not of the width of the tube;
   2. the mode energy or mode speed of each involved species;
   3. the real speeds and not the virtual speeds of each involved species;
   4. the concentrations of the solutions used;
   
   
2. The chronometer is used in the experiment for:
   1. indication of the moment when we should pay attention to the experiment;
   2. extracting the information necessary to calculate the diffusion coefficients;
   3. synchronization of the diffusion times;
   4. measuring of the diffusion time;
   
   
3. The fog observed during the experiment is due to:
   1. presence of the chlorine;
   2. presence of the ammonia;
   3. unproper illumination in the laboratory or our breathing;
   4. unproper illumination in the laboratory and our breathing;
   
   
4. We may say the followings:
   1. diffusion process appears only in gaseous state;
   2. the molecules have energy only in gaseous and liquid states;
   3. the kinetic energy of a molecule is affected by temperature and pressure;
   4. the molecules have speeds in all gaseous, liquid and solid states;
   
   
5. At the ends of the tube following equilibrium reactions occurs:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   4. NH₃ + HCl \=\ NH₄Cl
   
   

TEST DE FINAL DE LABORATOR
Studiul difuziei in stare gazoasa si a vitezelor moleculare

1. Pozitia inelului īn experimentul este dependenta de:
   1. lungimea tubului si nu latimea tubului;
   2. viteza la moda sau energia la moda a fiecarei specii implicate;
   3. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   4. concentratiile solutiilor utilizate;
   
   
2. Cronometrul este utilizat īn experimentul pentru:
   1. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   2. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   3. sincronizarea timpilor de difuzie;
   4. masurarea timpului de difuzie;
   5. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   
   
3. Ceata observata īn timpul experimentului se datoreaza:
   1. prezentei clorului;
   2. prezentei amoniacului;
   3. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   4. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   5. formarea clorurii de amoniu;
   
   
4. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. proces de difuzie apare numai īn stare gazoasa;
   2. moleculele au energie numai īn stare gazoasa si lichida;
   3. energia cinetica a unei molecule este afectata de temperatura si presiune;
   4. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   
   
5. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   4. NH₃ + HCl \=\ NH₄Cl
   5. H⁺ + HO^- \=\ H₂O
   
   

FINAL TEST AT LABORATORY
Study of the diffusion in gaseous state and molecular speeds

1. At the ends of the tube following equilibrium reactions occurs:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + HCl \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   
   
2. The chronometer is used in the experiment for:
   1. measuring of the diffusion time;
   2. to keep us busy;
   3. indication of the moment when we should pay attention to the experiment;
   4. synchronization of the diffusion times;
   
   
3. We may say the followings:
   1. the molecules have speeds only in gaseous state;
   2. the kinetic energy of a molecule is affected by temperature and pressure;
   3. the molecules have speeds only in gaseous and liquid states;
   4. the molecules have energy only in gaseous state;
   
   
4. The fog observed during the experiment is due to:
   1. formation of ammonium chloride;
   2. presence of the ammonia;
   3. unproper illumination in the laboratory and our breathing;
   4. presence of the chlorine;
   
   
5. The time to the formation of the ring in the experiment is dependent on:
   1. the average energy or average speed of each involved species;
   2. the virtual speeds and not the real speeds of each involved species;
   3. the propagation of the species as ions and not as neutral molecules;
   4. the length of the tube and the width of the tube;
   
   

TEST DE FINAL DE LABORATOR
Studiul difuziei in stare gazoasa si a vitezelor moleculare

1. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + HCl \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   5. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
2. Cronometrul este utilizat īn experimentul pentru:
   1. masurarea timpului de difuzie;
   2. sa ne tina ocupati;
   3. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   4. sincronizarea timpilor de difuzie;
   5. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   
   
3. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au viteze numai īn stare gazoasa;
   2. energia cinetica a unei molecule este afectata de temperatura si presiune;
   3. moleculele au viteze numai īn stare gazoasa si lichida;
   4. moleculele au energie numai īn stare gazoasa;
   5. moleculele au energie numai īn stare gazoasa si lichida;
   
   
4. Ceata observata īn timpul experimentului se datoreaza:
   1. formarea clorurii de amoniu;
   2. prezentei amoniacului;
   3. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   4. prezentei clorului;
   5. experimentului nostru proiectat pentru a captura produsul de reactie;
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. energia medie sau viteza medie a fiecarei specii implicate;
   2. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   3. propagarea speciilor ca ionii si nu ca si molecule neutre;
   4. lungimea tubului si latimea tubului;
   5. latimea tubului si nu lungimea tubului;
   
   

FINAL TEST AT LABORATORY
Study of the diffusion in gaseous state and molecular speeds

1. The time to the formation of the ring in the experiment is dependent on:
   1. the concentrations of the solutions used;
   2. the virtual speeds and not the real speeds of each involved species;
   3. the average energy or average speed of each involved species;
   4. the mode energy or mode speed of each involved species;
   
   
2. We may say the followings:
   1. the molecules have energy in all gaseous, liquid and solid states;
   2. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   3. diffusion process appears only in gaseous and liquid states;
   4. the kinetic energy of a molecule is affected by temperature and pressure;
   
   
3. The position of the ring in the experiment is dependent on:
   1. the propagation of the species as neutral molecules and not as ions;
   2. the propagation of the species as ions and not as neutral molecules;
   3. the virtual speeds and not the real speeds of each involved species;
   4. the concentrations of the solutions used;
   
   
4. At the ends of the tube following equilibrium reactions occurs:
   1. H₂O \=\ H⁺ + HO^-
   2. H⁺ + HO^- \=\ H₂O
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   
   
5. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the speeds ratio;
   2. synchronization of the diffusion times;
   3. to keep us busy;
   4. measuring of the diffusion time;
   
   

TEST DE FINAL DE LABORATOR
Studiul difuziei in stare gazoasa si a vitezelor moleculare

1. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. concentratiile solutiilor utilizate;
   2. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   3. energia medie sau viteza medie a fiecarei specii implicate;
   4. viteza la moda sau energia la moda a fiecarei specii implicate;
   
   
2. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au energie īn toate starile gazoasa, lichida si solida;
   2. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   3. proces de difuzie apare numai īn stare gazoasa si lichida;
   4. energia cinetica a unei molecule este afectata de temperatura si presiune;
   
   
3. Pozitia inelului īn experimentul este dependenta de:
   1. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   2. propagarea speciilor ca ionii si nu ca si molecule neutre;
   3. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   4. concentratiile solutiilor utilizate;
   
   
4. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H₂O \=\ H⁺ + HO^-
   2. H⁺ + HO^- \=\ H₂O
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   5. NH₃ + HCl \=\ NH₄Cl
   
   
5. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   2. sincronizarea timpilor de difuzie;
   3. sa ne tina ocupati;
   4. masurarea timpului de difuzie;
   5. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   
   

FINAL TEST AT LABORATORY
Obtaining of the oxygen: study of the gases laws

1. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   2. KNO₃ -> KNO₂ + O₂;
   3. opening a bubble water bottle;
   4. H₂O₂ -> H₂O + O₂;
   
   
2. For gaseous state:
   1. the pressure is much higher than in liquid state;
   2. the pressure is approximately the same as in liquid state;
   3. the pressure is unchanged when a chemical reaction occurs;
   4. the pressure is subject to change when a chemical reaction occurs;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. we do not possess enough information to decide what gas was released from the reaction;
   2. ozone were released as result of the decomposition;
   3. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   4. the ideal model of a gas approximated the worst the behavior of the released gas;
   
   
4. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. increasing of the pressure of a gas when was heated;
   3. increasing of the temperature of a solid mass when was heated;
   4. the producing of some gas as result of a lost of the mass of a solid;
   
   
5. A state equation for a real gas is:
   1. a relation which may involve some constants dependent of gas composition;
   2. a relation derived to approximate the relation between state parameters;
   3. a relation obtained after conducting of the experiment;
   4. a relation between an unlimited number of state parameters;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   2. KNO₃ -> KNO₂ + O₂;
   3. deschiderea unei sticle de apa cu bule;
   4. H₂O₂ -> H₂O + O₂;
   5. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   
   
2. Pentru stare gazoasa:
   1. presiunea este mult mai mare decāt īn stare lichida;
   2. presiunea este aproximativ aceeasi ca si īn stare lichida;
   3. presiunea este neschimbata cānd apare o reactie chimica;
   4. presiunea se pot modifica atunci cānd apare o reactie chimica;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   2. ozonul au fost eliberat ca urmare a descompunerii;
   3. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   
   
4. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. cresterea presiunii unui gaz cānd s-a īncalzit;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie care poate implica unele constante dependente de compozitia gazului;
   2. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   3. o relatie obtinut dupa efectuarea experimentului;
   4. o relatie īntre un numar nelimitat de parametri de stare;
   
   

FINAL TEST AT LABORATORY
Obtaining of the oxygen: study of the gases laws

1. For gaseous state:
   1. the pressure is much higher than in liquid state;
   2. we need to take supplementary precautions in the laboratory;
   3. the pressure is approximately the same as in liquid state;
   4. the pressure depends on the model which are used to approximate it;
   
   
2. The values taken from the experiment conducted in the laboratory indicated that:
   1. air were released as result of the decomposition;
   2. we possess enough information to decide what gas was released from the reaction;
   3. the ideal model of a gas approximated the worst the behavior of the released gas;
   4. ozone were released as result of the decomposition;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O + O₂ -> H₂O₂;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. KNO₃ -> KNO₂ + O₂;
   4. H₂O₂ -> H₂O + O₂;
   
   
4. In the laboratory were studied:
   1. the producing of some gas as result of a lost of the mass of a solid;
   2. the lost of the mass of a solid as result of producing of some gas;
   3. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   4. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   
   
5. A state equation for a real gas is:
   1. a relation which is always true, independent of the values of the state parameters;
   2. usable in the laboratory, but is not to be used somewhere else;
   3. a relation which takes into account certain deviations from the ideal model;
   4. a relation which may involve some constants dependent of gas composition;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pentru stare gazoasa:
   1. presiunea este mult mai mare decāt īn stare lichida;
   2. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   3. presiunea este aproximativ aceeasi ca si īn stare lichida;
   4. presiunea depinde de modelul care este utilizat pentru o aproxima;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. aer a fost eliberat ca urmare a descompunerii;
   2. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   4. ozonul au fost eliberat ca urmare a descompunerii;
   5. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O + O₂ -> H₂O₂;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. KNO₃ -> KNO₂ + O₂;
   4. H₂O₂ -> H₂O + O₂;
   
   
4. Īn laborator s-au studiat:
   1. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   2. pierdut din masa de solid ca urmare a producerii unor gaze;
   3. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   5. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   2. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   3. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   4. o relatie care poate implica unele constante dependente de compozitia gazului;
   5. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   
   

FINAL TEST AT LABORATORY
Obtaining of the oxygen: study of the gases laws

1. A state equation for a real gas is:
   1. a relation between an certain number of state parameters;
   2. usable in the laboratory, but is not to be used somewhere else;
   3. a relation between an unlimited number of state parameters;
   4. a relation which takes into account certain deviations from the ideal model;
   
   
2. In the laboratory were studied:
   1. increasing of the temperature of a solid mass when was heated;
   2. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   3. the lost of the mass of a solid as result of producing of some gas;
   4. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   
   
3. For gaseous state:
   1. the pressure depends on the model which are used to approximate it;
   2. the pressure is exactly the same as in liquid state;
   3. we need to take supplementary precautions in the laboratory;
   4. the pressure is much lower than in liquid state;
   
   
4. The values taken from the experiment conducted in the laboratory indicated that:
   1. we do not possess enough information to decide what gas was released from the reaction;
   2. oxigen were released as result of the decomposition;
   3. we possess enough information to decide what gas was released from the reaction;
   4. the ideal model of a gas approximated the worst the behavior of the released gas;
   
   
5. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   2. Ag + O₂ -> Ag₂O;
   3. KClO₃ -> KCl + O₂;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un anumit numar de parametri de stare;
   2. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   3. o relatie īntre un numar nelimitat de parametri de stare;
   4. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   5. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   
   
2. Īn laborator s-au studiat:
   1. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   2. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   3. pierdut din masa de solid ca urmare a producerii unor gaze;
   4. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   5. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   
   
3. Pentru stare gazoasa:
   1. presiunea depinde de modelul care este utilizat pentru o aproxima;
   2. presiunea este exact la fel ca si īn stare lichida;
   3. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   4. presiunea este mult mai mica decāt īn stare lichida;
   5. presiunea este neschimbata cānd apare o reactie chimica;
   
   
4. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   2. oxigenul au fost eliberat ca urmare a descompunerii;
   3. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   4. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   
   
5. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   2. Ag + O₂ -> Ag₂O;
   3. KClO₃ -> KCl + O₂;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   5. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   
   

FINAL TEST AT LABORATORY
Obtaining of the oxygen: study of the gases laws

1. The values taken from the experiment conducted in the laboratory indicated that:
   1. the ideal model of a gas approximated the worst the behavior of the released gas;
   2. we do not possess enough information to decide what gas was released from the reaction;
   3. the ideal model of a gas approximated the best the behavior of the released gas;
   4. ozone were released as result of the decomposition;
   
   
2. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O₂ -> H₂O + O₂;
   2. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. Ag + O₂ -> Ag₂O;
   4. Ag₂O -> Ag + O₂;
   
   
3. For gaseous state:
   1. we need to take supplementary precautions in the laboratory;
   2. the pressure is approximately the same as in liquid state;
   3. the pressure is exactly the same as in liquid state;
   4. the pressure is much higher than in liquid state;
   
   
4. In the laboratory were studied:
   1. the producing of some gas as result of a lost of the mass of a solid;
   2. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   3. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   4. increasing of the pressure of a gas when was heated;
   
   
5. A state equation for a real gas is:
   1. a relation derived to approximate the relation between state parameters;
   2. a relation which may involve some constants dependent of gas composition;
   3. a relation which is always true, independent of the values of the state parameters;
   4. usable in the laboratory, but is not to be used somewhere else;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   2. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   4. ozonul au fost eliberat ca urmare a descompunerii;
   
   
2. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O₂ -> H₂O + O₂;
   2. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. Ag + O₂ -> Ag₂O;
   4. Ag₂O -> Ag + O₂;
   5. KNO₃ -> KNO₂ + O₂;
   
   
3. Pentru stare gazoasa:
   1. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   2. presiunea este aproximativ aceeasi ca si īn stare lichida;
   3. presiunea este exact la fel ca si īn stare lichida;
   4. presiunea este mult mai mare decāt īn stare lichida;
   
   
4. Īn laborator s-au studiat:
   1. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   2. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   3. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   4. cresterea presiunii unui gaz cānd s-a īncalzit;
   5. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   2. o relatie care poate implica unele constante dependente de compozitia gazului;
   3. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   4. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   5. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   
   

FINAL TEST AT LABORATORY
Obtaining of the oxygen: study of the gases laws

1. In the laboratory were studied:
   1. increasing of the pressure of a gas when was heated;
   2. the producing of some gas as result of a lost of the mass of a solid;
   3. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   4. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   
   
2. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O + O₂ -> H₂O₂;
   2. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   3. Ag₂O -> Ag + O₂;
   4. distillation of the liquid air;
   
   
3. A state equation for a real gas is:
   1. a relation which may involve some constants dependent of gas composition;
   2. a relation obtained after conducting of the experiment;
   3. a relation between an unlimited number of state parameters;
   4. a relation derived to approximate the relation between state parameters;
   
   
4. The values taken from the experiment conducted in the laboratory indicated that:
   1. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   2. we do not possess enough information to decide what gas was released from the reaction;
   3. oxigen were released as result of the decomposition;
   4. the ideal model of a gas approximated the best the behavior of the released gas;
   
   
5. For gaseous state:
   1. the pressure is exactly the same as in liquid state;
   2. we need to take supplementary precautions in the laboratory;
   3. the pressure is much lower than in liquid state;
   4. the pressure depends on the model which are used to approximate it;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. cresterea presiunii unui gaz cānd s-a īncalzit;
   2. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   3. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   4. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   5. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   
   
2. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O + O₂ -> H₂O₂;
   2. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   3. Ag₂O -> Ag + O₂;
   4. distilarea aerului lichid;
   
   
3. O ecuatie de stare pentru un gaz real este:
   1. o relatie care poate implica unele constante dependente de compozitia gazului;
   2. o relatie obtinut dupa efectuarea experimentului;
   3. o relatie īntre un numar nelimitat de parametri de stare;
   4. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   5. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   
   
4. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   2. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. oxigenul au fost eliberat ca urmare a descompunerii;
   4. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   
   
5. Pentru stare gazoasa:
   1. presiunea este exact la fel ca si īn stare lichida;
   2. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   3. presiunea este mult mai mica decāt īn stare lichida;
   4. presiunea depinde de modelul care este utilizat pentru o aproxima;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When aluminum is identified:
   1. is identified as Al¹⁺ cation;
   2. the presence of other ions may produce a false negative outcome;
   3. only one identification reaction is possible;
   4. using of alizarin along with ammonium hidroxide provide a red colored complex;
   
   
2. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   3. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   
   
3. Why moisten the paper with solution of sodium nitrate?
   1. to be cut easily with scissors;
   2. to provide cations for analysis;
   3. for the paper to work as isolator;
   4. to accomodate ourselves to use chemicals;
   
   
4. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as anions;
   2. surface of the sample is fastly covered by a protecting shield of electrons;
   3. electric current avoids the sample and the paper;
   4. anions from the solution are passed into sample as metals;
   
   
5. When lead is identified:
   1. dangerous substances are used;
   2. a red-brown complex appears;
   3. the reactions used clearly indicates its presence;
   4. a yellow complex appears;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al¹⁺;
   2. prezenta altor ioni poate produce un rezultat fals negativ;
   3. doar o reactie de identificare este posibila;
   4. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   
   
2. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   3. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   5. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
3. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. sa fie taiat cu usurinta cu foarfeca;
   2. pentru furniza cationi pentru analiza;
   3. pentru ca hartia sa actioneze ca izolator;
   4. sa ne acomodam in a utiliza substante chimice;
   
   
4. Cānd circuitul electric este īnchis:
   1. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   2. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   3. curent electric evita proba si hārtia;
   4. anionii din solutie sunt trecuti īn proba ca metale;
   5. disocierea apei este inhibata;
   
   
5. Cānd plumbul este identificat:
   1. sunt utilizate substante periculoase;
   2. apare un complex rosu-brun;
   3. reactiile utilizate īn mod clar ii indica prezenta;
   4. apare un complex galben;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   3. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   
   
2. This method of analysis of metals and alloys is:
   1. not useful for both metals and alloys;
   2. too ancient to be used today in the laboratory;
   3. a destructive method of analysis;
   4. useful for both metals and alloys;
   
   
3. Why moisten the paper with solution of sodium nitrate?
   1. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   2. for the paper to work as isolator;
   3. to have something to do in the laboratory;
   4. to provide cations for analysis;
   
   
4. When lead is identified:
   1. interference of other ions may affect the outcome;
   2. precautions should be made for toxic wastes disposal;
   3. a red-brown complex appears;
   4. a yellow complex appears;
   
   
5. When the electrical circuit is closed:
   1. water dissociation is inhibited;
   2. elements from the metals are passed into solution as anions;
   3. surface of the sample is fastly covered by a protecting shield of electrons;
   4. elements from the solution are passed into sample as metals;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   3. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   
   
2. Aceasta metoda de analiza de metale si aliaje este:
   1. nu este utila nici pentru metale nici pentru aliaje;
   2. prea veche pentru a fi utilizata īn prezent īn laborator;
   3. o metoda distructiva de analiza;
   4. utila atāt pentru metale si aliaje;
   
   
3. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   2. pentru ca hartia sa actioneze ca izolator;
   3. pentru a avea ceva de a face īn laborator;
   4. pentru furniza cationi pentru analiza;
   
   
4. Cānd plumbul este identificat:
   1. interferenta altor ioni poate afecta rezultatul;
   2. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   3. apare un complex rosu-brun;
   4. apare un complex galben;
   
   
5. Cānd circuitul electric este īnchis:
   1. disocierea apei este inhibata;
   2. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   3. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   4. elemente din solutie sunt trecute īn proba ca metale;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. too ancient to be used today in the laboratory;
   2. a quantitative method of analysis;
   3. useful for both metals and alloys;
   4. useful for alloys, not so useful for metals;
   
   
2. When lead is identified:
   1. a blue complex appears;
   2. the reactions used clearly indicates its presence;
   3. a yellow complex appears;
   4. a violet complex appears;
   
   
3. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   2. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
4. Why moisten the paper with solution of sodium nitrate?
   1. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   2. to be cut easily with scissors;
   3. for stopping after a while the chemical reaction that takes place;
   4. to accomodate ourselves to use chemicals;
   
   
5. When aluminum is identified:
   1. the presence of other ions may produce a false positive outcome;
   2. the presence of other ions may produce a false negative outcome;
   3. the presence of other ions may produce a true negative outcome;
   4. only one identification reaction is possible;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. prea veche pentru a fi utilizata īn prezent īn laborator;
   2. o metoda cantitativa de analiza;
   3. utila atāt pentru metale si aliaje;
   4. utila pentru aliaje, nu atāt de utila pentru metale;
   
   
2. Cānd plumbul este identificat:
   1. apare un complex albastru;
   2. reactiile utilizate īn mod clar ii indica prezenta;
   3. apare un complex galben;
   4. apare un complex violet;
   5. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   
   
3. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   2. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
4. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   2. sa fie taiat cu usurinta cu foarfeca;
   3. pentru oprirea dupa un timp reactiei chimice care are loc;
   4. sa ne acomodam in a utiliza substante chimice;
   
   
5. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat fals pozitiv;
   2. prezenta altor ioni poate produce un rezultat fals negativ;
   3. prezenta altor ioni poate produce un rezultat adevarat negativ;
   4. doar o reactie de identificare este posibila;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. Why moisten the paper with solution of sodium nitrate?
   1. to have something to do in the laboratory;
   2. for stopping after a while the chemical reaction that takes place;
   3. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   4. for the paper to work as isolator;
   
   
2. When the electrical circuit is closed:
   1. anions from the solution are passed into sample as metals;
   2. electric current avoids the sample and the paper;
   3. elements from the metals are passed into solution as anions;
   4. cations from the solution are passed into sample as metals;
   
   
3. When aluminum is identified:
   1. is identified as Al¹⁺ cation;
   2. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   3. is identified as Al³⁺ cation;
   4. the presence of other ions may produce a false positive outcome;
   
   
4. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   2. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
5. The paper requires before analysis of the sample:
   1. to be burned;
   2. to be moistened with an electrolyte;
   3. to measure its surface;
   4. to be acidified;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru a avea ceva de a face īn laborator;
   2. pentru oprirea dupa un timp reactiei chimice care are loc;
   3. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   4. pentru ca hartia sa actioneze ca izolator;
   5. pentru furniza cationi pentru analiza;
   
   
2. Cānd circuitul electric este īnchis:
   1. anionii din solutie sunt trecuti īn proba ca metale;
   2. curent electric evita proba si hārtia;
   3. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   4. cationii din solutie sunt trecuti īn proba ca metale;
   
   
3. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al¹⁺;
   2. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   3. este identificat ca cationul Al³⁺;
   4. prezenta altor ioni poate produce un rezultat fals pozitiv;
   5. doar o reactie de identificare este posibila;
   
   
4. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   2. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
5. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa fie umezita cu un electrolit;
   3. sa i se masoare suprafata;
   4. sa fie acidulata;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   2. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
2. When aluminum is identified:
   1. only one identification reaction is possible;
   2. is identified as Al¹⁺ cation;
   3. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   4. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   
   
3. This method of analysis of metals and alloys is:
   1. useful for both metals and alloys;
   2. useful for pure metals, not so useful for alloys;
   3. not useful for both metals and alloys;
   4. useful for alloys, not so useful for metals;
   
   
4. When lead is identified:
   1. a red-brown complex appears;
   2. a yellow complex appears;
   3. precautions should be made for toxic wastes disposal;
   4. a heat release is observed;
   
   
5. The paper requires before analysis of the sample:
   1. to be cut in small pieces;
   2. to be burned;
   3. to be acidified;
   4. to be tested;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   2. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   5. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
2. Cānd aluminiu este identificat:
   1. doar o reactie de identificare este posibila;
   2. este identificat ca cationul Al¹⁺;
   3. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   4. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   
   
3. Aceasta metoda de analiza de metale si aliaje este:
   1. utila atāt pentru metale si aliaje;
   2. utila pentru metale pure, nu atāt de utila pentru aliaje;
   3. nu este utila nici pentru metale nici pentru aliaje;
   4. utila pentru aliaje, nu atāt de utila pentru metale;
   
   
4. Cānd plumbul este identificat:
   1. apare un complex rosu-brun;
   2. apare un complex galben;
   3. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   4. se observa o eliberare de caldura;
   
   
5. Hartia necesita ca īnainte de analiza probei:
   1. sa fie taiata īn bucati mici;
   2. sa fie arsa;
   3. sa fie acidulata;
   4. sa fie testata;
   5. sa i se masoare suprafata;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. A redox process:
   1. involves changing of the oxidation states of some participants to the reaction;
   2. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. involves changing of the aggregation states of some participants to the reaction;
   
   
2. The density of the solutions depends on:
   1. concentration;
   2. time elapsed since were prepared;
   3. quantity;
   4. pressure;
   
   
3. When a chemical reaction is balanced, following should be considered:
   1. all glassware should be clean before and after conducting the experiment;
   2. the liquid in the burette should be at the same level before and after conducting the experiment;
   3. the principle of the conservation of the energy;
   4. all glassware should be clean before, after and during the experiment;
   
   
4. Titration as a laboratory operation involves:
   1. an mixing of two ore more solutions;
   2. a volume measurement;
   3. a salt solution;
   4. a mass measurement;
   
   
5. The following chemical reactions were used in the experiments:
   1. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Un proces redox:
   1. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   2. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   
   
2. Densitatea solutiilor depinde de:
   1. concentratie;
   2. timpul scurs de cand au fost pregatite;
   3. cantitate;
   4. presiune;
   5. furnizor;
   
   
3. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   2. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   3. principiul conservarii energiei;
   4. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   5. principiul conservarii volumului;
   
   
4. Titrarea ca o operatiune de laborator implica:
   1. amestecul a doua sau mai multe solutii;
   2. masurarea volumului;
   3. o solutie de sare;
   4. masurarea masei;
   
   
5. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the volume;
   2. all glassware should be clean before, after and during the experiment;
   3. the principle of the conservation of the energy;
   4. the principle of the conservation of the number of atoms for each element;
   
   
2. The indicator should be added:
   1. to indicate our safety limits when we dealt with chemicals;
   2. to provide a color change at equivalence point;
   3. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   4. in small quantities, to avoid the errors in observations and in calculations;
   
   
3. Reactions between acids and bases:
   1. are all exothermic, being therefore dangerous outside of the laboratory;
   2. have as a consequence the dissolution of a salt;
   3. have as effect the change of the color of a solution;
   4. always have as a consequence the formation of a quantity of water;
   
   
4. In the calculations:
   1. are necessary to use some formulas expressing in different ways the concentration;
   2. are necessary to establish the coefficients of the chemical reaction;
   3. are necessary to take the results imediatly after these are available from others;
   4. are necessary to take some information from reagent bottles;
   
   
5. Titration as a laboratory operation involves:
   1. a pH-metter;
   2. an mixing of two ore more solutions;
   3. a mass measurement;
   4. a natrium hydroxide solution;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii volumului;
   2. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   3. principiul conservarii energiei;
   4. principiul conservarii numarul de atomi pentru fiecare element;
   5. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   
   
2. Trebuie adaugat indicatorul:
   1. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   2. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   3. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   4. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   5. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   
   
3. Reactiile īntre acizi si baze:
   1. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   2. au drept consecinta dizolvarea unei sari;
   3. au ca efect schimbarea culorii unei solutii;
   4. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   5. sunt rareori utile, si chiar mai rar utilizate;
   
   
4. In calcule:
   1. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   2. este necesara stabilirea coeficientilor reactiei chimice;
   3. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   4. este necesar a se lua unele informatii de pe sticlele de reactivi;
   
   
5. Titrarea ca o operatiune de laborator implica:
   1. un pH-metru;
   2. amestecul a doua sau mai multe solutii;
   3. masurarea masei;
   4. o solutie de hidroxid de sodiu;
   5. o biureta;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The density of the solutions depends on:
   1. time elapsed since were prepared;
   2. pressure;
   3. temperature;
   4. provider;
   
   
2. The following chemical reactions were used in the experiments:
   1. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. H₂O + CO₂ -> H₂CO₃
   
   
3. Reactions between acids and bases:
   1. have as a consequence the dissolution of a salt;
   2. always have as a consequence the formation of a quantity of water;
   3. have as effect the change of the color of a solution;
   4. are always fast, taking place almost instantaneously;
   
   
4. The equivalence point is:
   1. the point in which a reactive should be added in the reaction flask;
   2. indicated when a color change is observed into the solution;
   3. the point in which a reactive should be added in the burette;
   4. something rarely encountered in chemistry;
   
   
5. When a chemical reaction is balanced, following should be considered:
   1. the liquid in the burette should be at the same level before and after conducting the experiment;
   2. the principle of the conservation of the volume;
   3. the principle of the conservation of the number of atoms for each element;
   4. all glassware should be clean before, after and during the experiment;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Densitatea solutiilor depinde de:
   1. timpul scurs de cand au fost pregatite;
   2. presiune;
   3. temperatura;
   4. furnizor;
   5. concentratie;
   
   
2. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. H₂O + CO₂ -> H₂CO₃
   5. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   
3. Reactiile īntre acizi si baze:
   1. au drept consecinta dizolvarea unei sari;
   2. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   3. au ca efect schimbarea culorii unei solutii;
   4. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   5. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   
   
4. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   2. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   4. ceva rar īntālnit īn chimie;
   5. punctul īn care un reactiv este consumat complet īn reactie;
   
   
5. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   2. principiul conservarii volumului;
   3. principiul conservarii numarul de atomi pentru fiecare element;
   4. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. In the calculations:
   1. are necessary to take the results imediatly after these are available from others;
   2. are necessary to establish the coefficients of the chemical reaction;
   3. are necessary to discuss with our colleagues;
   4. are necessary to draw the tables in our notebooks after completing of the experiment;
   
   
2. A redox process:
   1. involves changing of the oxidation states of some participants to the reaction;
   2. is always fast and safe;
   3. involves a transfer of electrons from one atom or group of atoms to another;
   4. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
3. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the volume;
   2. the liquid in the burette should be at the same level before and after conducting the experiment;
   3. the principle of the conservation of the energy;
   4. all glassware should be clean before, after and during the experiment;
   
   
4. The density of the solutions depends on:
   1. pressure;
   2. temperature;
   3. quantity;
   4. time elapsed since were prepared;
   
   
5. Reactions between acids and bases:
   1. have as a consequence the dissolution of a salt;
   2. always have as a consequence the formation of a quantity of water;
   3. have as effect the change of the color of a solution;
   4. are always fast, taking place almost instantaneously;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. In calcule:
   1. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   2. este necesara stabilirea coeficientilor reactiei chimice;
   3. este necesar sa discutam cu colegii;
   4. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   5. este necesar sa utilizam telefoanele;
   
   
2. Un proces redox:
   1. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   2. este īntotdeauna rapid si sigur;
   3. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   4. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   5. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
3. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii volumului;
   2. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   3. principiul conservarii energiei;
   4. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   5. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   
   
4. Densitatea solutiilor depinde de:
   1. presiune;
   2. temperatura;
   3. cantitate;
   4. timpul scurs de cand au fost pregatite;
   
   
5. Reactiile īntre acizi si baze:
   1. au drept consecinta dizolvarea unei sari;
   2. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   3. au ca efect schimbarea culorii unei solutii;
   4. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The indicator should be added:
   1. only at the suggestion of the supervisor;
   2. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   3. to indicate our safety limits when we dealt with chemicals;
   4. to provide a color change at equivalence point;
   
   
2. The following chemical reactions were used in the experiments:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. H₂O + CO₂ -> H₂CO₃
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
3. Titration as a laboratory operation involves:
   1. a burette;
   2. a pH-metter;
   3. a volume measurement;
   4. a sulphuric acid solution;
   
   
4. In the calculations:
   1. are necessary to use some formulas expressing in different ways the concentration;
   2. are necessary to use our phones;
   3. are necessary to discuss with our colleagues;
   4. are necessary to draw the tables in our notebooks after completing of the experiment;
   
   
5. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the energy;
   2. the liquid in the burette should be at the same level before and after conducting the experiment;
   3. all glassware should be clean before, after and during the experiment;
   4. the principle of the conservation of the volume;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Trebuie adaugat indicatorul:
   1. numai la sugestia supraveghetorului;
   2. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   3. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   4. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   5. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   
   
2. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. H₂O + CO₂ -> H₂CO₃
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   5. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
3. Titrarea ca o operatiune de laborator implica:
   1. o biureta;
   2. un pH-metru;
   3. masurarea volumului;
   4. o solutie de acid sulfuric;
   
   
4. In calcule:
   1. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   2. este necesar sa utilizam telefoanele;
   3. este necesar sa discutam cu colegii;
   4. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   5. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   
   
5. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii energiei;
   2. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   3. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   4. principiul conservarii volumului;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + HO⁺ -> H₂O + Cl⁺
   3. HCl + HO^- -> H₂O + Cl^-
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   
2. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + CO₃^2- -> HCO₃^- + Cl^-
   2. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   3. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   
   
3. We may say the followings:
   1. natural water may contain organic matter and living organisms;
   2. water is pure only when is taken from a good freshwater mountain stream;
   3. water is a good polar solvent;
   4. purification of the water may include biological processes;
   
   
4. For a water sample following measures may be quantitatively expressed:
   1. permanent alkalinity;
   2. mineral acidity;
   3. total acidity;
   4. color;
   
   
5. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   2. NaOH + CH₃COO^- -> CH₃COONa + HO^-
   3. NaOH + HCOO⁺ -> HCOONa + HO⁺
   4. NaOH + HCOO^- -> HCOONa + HO^-
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + HO⁺ -> H₂O + Cl⁺
   3. HCl + HO^- -> H₂O + Cl^-
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + CO₃^2- -> HCO₃^- + Cl^-
   2. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   3. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   5. HCl + HO⁺ -> H₂O + Cl⁺
   
   
3. Putem spune urmatoarele:
   1. apa naturala poate contine materie organica si organisme vii;
   2. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   3. apa este un solvent polar bun;
   4. purificarea apei poate include procese biologice;
   5. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   
   
4. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. alcalinitate permanenta;
   2. aciditate minerala;
   3. aciditate totala;
   4. culoare;
   5. alcalinitate totala;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   2. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   3. NaOH + HCOO⁺ -> HCOONa + HO⁺
   4. NaOH + HCOO^- -> HCOONa + HO^-
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + CO₃^2- -> HCO₃^- + Cl^-
   2. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   3. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   4. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   
   
2. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   
3. For a water sample following measures may be quantitatively expressed:
   1. color;
   2. hardness;
   3. total alkalinity;
   4. total acidity;
   
   
4. We may say the followings:
   1. water is good for drinking, it is nothing to be analysed;
   2. purification of the water may include biological processes;
   3. natural water may contain organic matter and living organisms;
   4. purification of the water may include physical processes;
   
   
5. In the laboratory were analyzed:
   1. the concentration of the water;
   2. the softness of the water;
   3. the mass of the water;
   4. the temperature of the water;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + CO₃^2- -> HCO₃^- + Cl^-
   2. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   3. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   4. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   5. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   
   
3. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. culoare;
   2. duritate;
   3. alcalinitate totala;
   4. aciditate totala;
   5. aciditate minerala;
   
   
4. Putem spune urmatoarele:
   1. apa este buna pentru consum, nu este nimic de a fi analizat;
   2. purificarea apei poate include procese biologice;
   3. apa naturala poate contine materie organica si organisme vii;
   4. purificarea apei poate include procedee fizice;
   
   
5. Īn laborator au fost analizate:
   1. concentratia apei;
   2. moliciunea apei;
   3. masa apei;
   4. temperatura apei;
   5. punctul de fierbere al apei;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. mineral acidity;
   2. purity;
   3. total acidity;
   4. color;
   
   
2. We may say the followings:
   1. when water contains dissolved minerals and gases is bad for drinking;
   2. water is good for drinking, it is nothing to be analysed;
   3. water is pure only when is taken from a good freshwater mountain stream;
   4. purification of the water may include biological processes;
   
   
3. In the laboratory the water were:
   1. acidified for drinking purposes;
   2. softened using the resin column;
   3. alkalinized for drinking purposes;
   4. complexed by using EDTA titrimetric method;
   
   
4. In the laboratory were analyzed:
   1. the softness of the water;
   2. the hardness of the water;
   3. the mass of the water;
   4. the boiling point of the water;
   
   
5. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. for indication of the equilibrium point in the reaction;
   3. for safety precautions purposes;
   4. for recharging of the resin for water softening;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. aciditate minerala;
   2. puritate;
   3. aciditate totala;
   4. culoare;
   
   
2. Putem spune urmatoarele:
   1. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   2. apa este buna pentru consum, nu este nimic de a fi analizat;
   3. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   4. purificarea apei poate include procese biologice;
   
   
3. In laborator apa au fost:
   1. acidulata pentru baut;
   2. dedurizata folosind coloana de rasina;
   3. alcalinizeaza pentru baut;
   4. complexata prin metoda titrimetrica EDTA;
   5. calita folosind coloana de rasina;
   
   
4. Īn laborator au fost analizate:
   1. moliciunea apei;
   2. duritatea apei;
   3. masa apei;
   4. punctul de fierbere al apei;
   
   
5. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. pentru indicarea punctului de echilibru īn reactie;
   3. ca masura de siguranta;
   4. pentru reīncarcarea rasinii la dedurizarea apei;
   5. ca reactiv pentru determinarea duritatii apei;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   2. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   3. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   4. NaOH + HCOO⁺ -> HCOONa + HO⁺
   
   
2. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   2. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   
   
3. EDTA is used:
   1. for recharging of the resin for water softening;
   2. for complexing of Na¹⁺ and K¹⁺ ions;
   3. for complexing of Ca²⁺ and Mg²⁺ ions;
   4. for indication of the equilibrium point in the reaction;
   
   
4. In the laboratory were analyzed:
   1. the solubility of the water;
   2. the acidity of the water;
   3. the hardness of the water;
   4. the temperature of the water;
   
   
5. We may say the followings:
   1. water is pure only when is taken from a good freshwater mountain stream;
   2. purification of the water may include chemical processes;
   3. natural water may contain organic matter and living organisms;
   4. purification of the water may include physical processes;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   2. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   3. NaOH + CO₃^2- -> HCO₃^- + HO^-
   4. NaOH + HCOO⁺ -> HCOONa + HO⁺
   5. NaOH + HCOO^- -> HCOONa + HO^-
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   2. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   5. NaOH + NO₃^- -> NaNO₃ + HO^-
   
   
3. EDTA este utilizat:
   1. pentru reīncarcarea rasinii la dedurizarea apei;
   2. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   3. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   4. pentru indicarea punctului de echilibru īn reactie;
   
   
4. Īn laborator au fost analizate:
   1. solubilitatea apei;
   2. aciditatea apei;
   3. duritatea apei;
   4. temperatura apei;
   
   
5. Putem spune urmatoarele:
   1. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   2. purificarea apei poate include procese chimice;
   3. apa naturala poate contine materie organica si organisme vii;
   4. purificarea apei poate include procedee fizice;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. We may say the followings:
   1. purification of the water may include labeling processes;
   2. water is a good polar solvent;
   3. purification of the water may include chemical processes;
   4. natural water may contain organic matter and living organisms;
   
   
2. EDTA is used:
   1. as reagent for determining the hardness of the water;
   2. for recharging of the resin for water softening;
   3. for safety precautions purposes;
   4. for complexing of Ca²⁺ and Mg²⁺ ions;
   
   
3. In the laboratory the water were:
   1. softened using the resin column;
   2. alkalinized for drinking purposes;
   3. complexed by using EDTA titrimetric method;
   4. hardened using the resin column;
   
   
4. In the laboratory were analyzed:
   1. the mass of the water;
   2. the hardness of the water;
   3. the boiling point of the water;
   4. the softness of the water;
   
   
5. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Putem spune urmatoarele:
   1. purificarea apei poate include procesele de etichetare;
   2. apa este un solvent polar bun;
   3. purificarea apei poate include procese chimice;
   4. apa naturala poate contine materie organica si organisme vii;
   5. purificarea apei poate include procedee fizice;
   
   
2. EDTA este utilizat:
   1. ca reactiv pentru determinarea duritatii apei;
   2. pentru reīncarcarea rasinii la dedurizarea apei;
   3. ca masura de siguranta;
   4. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   5. pentru indicarea punctului de echilibru īn reactie;
   
   
3. In laborator apa au fost:
   1. dedurizata folosind coloana de rasina;
   2. alcalinizeaza pentru baut;
   3. complexata prin metoda titrimetrica EDTA;
   4. calita folosind coloana de rasina;
   5. purificata biologic utilizānd coloana de rasina;
   
   
4. Īn laborator au fost analizate:
   1. masa apei;
   2. duritatea apei;
   3. punctul de fierbere al apei;
   4. moliciunea apei;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   
   

FINAL TEST AT LABORATORY
Volumetric and gravimetric methods in study of corrosion

1. Which of the following reactions may be called as of corrosion:
   1. Ni(CO)₄ -> Ni + CO
   2. H⁺ + Ni -> H₂ + Ni²⁺
   3. ZnO + CO -> Zn + CO₂
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
2. Corrosion of metals:
   1. is the protection in time to chemical agents;
   2. is a beneficial process that shows the stability of metals;
   3. may provide useful raw materials for analysis;
   4. is helping in the process of cleaning the metals surfaces;
   
   
3. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an cation;
   2. always the metal changes its oxidation state;
   3. a gas is released at both corrosion of zinc and aluminum;
   4. a gas is released only the corrosion of zinc;
   
   
4. The aluminum plate:
   1. the volume is measured before and after immersing it in NaOH;
   2. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   3. the mass is measured before and after immersing it in NaOH;
   4. was corroded in sodium hydroxide solution;
   
   
5. The zinc plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was degreased in sulfuric acid solution;
   3. the volume is measured before and after immersing it in H₂SO₄;
   4. was involved in the gravimetric method of corrosion analysis
   
   

TEST DE FINAL DE LABORATOR
Metode volumetrice si gravimetrice in studiul coroziunii

1. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. Ni(CO)₄ -> Ni + CO
   2. H⁺ + Ni -> H₂ + Ni²⁺
   3. ZnO + CO -> Zn + CO₂
   4. Al₂O₃ + NaOH -> NaAlO₂
   5. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   
2. Coroziunea metalelor:
   1. este protectia de durata impotriva agentilor chimici;
   2. este un proces benefic care arata stabilitatea metalelor;
   3. poate furniza materii prime utile pentru analiza;
   4. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   
   
3. Īn procesele de coroziune studiate:
   1. metalul isi schimba starea de oxidare pentru a deveni un cation;
   2. īntotdeauna metalul isi schimba starea de oxidare;
   3. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   4. un gaz este eliberat numai la corodarea zincului;
   5. metalul isi schimba starea de oxidare pentru a deveni un anion;
   
   
4. Pentru placa de aluminiu:
   1. volumul se masoara īnainte si dupa imersia īn NaOH;
   2. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   3. masa este masurata īnainte si dupa imersia īn NaOH;
   4. a fost corodata īn solutie de hidroxid de sodiu;
   
   
5. Pentru placa de zinc:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. a fost degresata īn solutie de acid sulfuric;
   3. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   5. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   

FINAL TEST AT LABORATORY
Volumetric and gravimetric methods in study of corrosion

1. The aluminum plate:
   1. was involved in the volumetric method of corrosion analysis
   2. the surface is measured before and after immersing it in NaOH;
   3. the mass is measured before and after immersing it in NaOH;
   4. was involved in the gravimetric method of corrosion analysis
   
   
2. Which of the following reactions may be called as of corrosion:
   1. ZnO + CO -> Zn + CO₂
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. Fe₂O₃ + CO -> Fe + CO₂
   4. H⁺ + Zn -> H₂ + Zn²⁺
   
   
3. The zinc plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was corroded in sulfuric solution;
   3. was degreased in sulfuric acid solution;
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
4. Corrosion of metals:
   1. is helping in the process of cleaning the metals surfaces;
   2. takes place merely from exposure to moisture in air;
   3. may provide useful raw materials for analysis;
   4. is the protection in time to chemical agents;
   
   
5. In studied corrosion processes:
   1. when a gas is released its volume depends on the amount of metal corroded;
   2. a gas is released only the corrosion of aluminum;
   3. a gas is released at both corrosion of zinc and aluminum;
   4. a gas is released only the corrosion of zinc;
   
   

TEST DE FINAL DE LABORATOR
Metode volumetrice si gravimetrice in studiul coroziunii

1. Pentru placa de aluminiu:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. suprafata se masoara īnainte si dupa imersia īn NaOH;
   3. masa este masurata īnainte si dupa imersia īn NaOH;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. ZnO + CO -> Zn + CO₂
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. Fe₂O₃ + CO -> Fe + CO₂
   4. H⁺ + Zn -> H₂ + Zn²⁺
   5. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   
3. Pentru placa de zinc:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. a fost corodata īn solutie sulfuric;
   3. a fost degresata īn solutie de acid sulfuric;
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
4. Coroziunea metalelor:
   1. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   2. are loc pur si simplu prin expunerea la umiditate īn aer;
   3. poate furniza materii prime utile pentru analiza;
   4. este protectia de durata impotriva agentilor chimici;
   
   
5. Īn procesele de coroziune studiate:
   1. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   2. un gaz este eliberat numai la corodarea aluminiului;
   3. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   4. un gaz este eliberat numai la corodarea zincului;
   
   

FINAL TEST AT LABORATORY
Volumetric and gravimetric methods in study of corrosion

1. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   
2. The aluminum plate:
   1. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   2. was involved in the volumetric method of corrosion analysis
   3. the surface is measured before and after immersing it in NaOH;
   4. the volume is measured before and after immersing it in NaOH;
   
   
3. The zinc plate:
   1. the surface is measured before and after immersing it in H₂SO₄;
   2. was involved in the gravimetric method of corrosion analysis
   3. was corroded in sulfuric solution;
   4. was involved in the volumetric method of corrosion analysis
   
   
4. In studied corrosion processes:
   1. a gas is released only the corrosion of zinc;
   2. the metal it changes its oxidation state becoming an anion;
   3. when a gas is released its volume depends on the amount of metal corroded;
   4. the metal it changes its oxidation state becoming an cation;
   
   
5. Corrosion of metals:
   1. is a beneficial process that shows the stability of metals;
   2. is the protection in time to chemical agents;
   3. is helping in the process of cleaning the metals surfaces;
   4. is the destruction of metals under the action of external factors;
   
   

TEST DE FINAL DE LABORATOR
Metode volumetrice si gravimetrice in studiul coroziunii

1. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   5. Al₂O₃ + NaOH -> NaAlO₂
   
   
2. Pentru placa de aluminiu:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. suprafata se masoara īnainte si dupa imersia īn NaOH;
   4. volumul se masoara īnainte si dupa imersia īn NaOH;
   
   
3. Pentru placa de zinc:
   1. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. a fost corodata īn solutie sulfuric;
   4. a fost implicata īn metoda volumetrica de analiza a coroziunii
   5. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   
   
4. Īn procesele de coroziune studiate:
   1. un gaz este eliberat numai la corodarea zincului;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   4. metalul isi schimba starea de oxidare pentru a deveni un cation;
   5. un gaz este eliberat numai la corodarea aluminiului;
   
   
5. Coroziunea metalelor:
   1. este un proces benefic care arata stabilitatea metalelor;
   2. este protectia de durata impotriva agentilor chimici;
   3. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   4. este distrugerea metalelor sub actiunea factorilor externi;
   5. poate furniza materii prime utile pentru analiza;
   
   

FINAL TEST AT LABORATORY
Volumetric and gravimetric methods in study of corrosion

1. Corrosion of metals:
   1. can be reduced by electroplating;
   2. is helping in the process of cleaning the metals surfaces;
   3. takes place merely from exposure to moisture in air;
   4. may provide useful raw materials for analysis;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
3. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an anion;
   2. a gas is released only the corrosion of aluminum;
   3. a gas is released only the corrosion of zinc;
   4. when a gas is released its volume depends on the amount of metal corroded;
   
   
4. The zinc plate:
   1. was degreased in sulfuric acid solution;
   2. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   3. was corroded in sulfuric solution;
   4. the surface is measured before and after immersing it in H₂SO₄;
   
   
5. The aluminum plate:
   1. was corroded in sodium hydroxide solution;
   2. was involved in the volumetric method of corrosion analysis
   3. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   4. was involved in the gravimetric method of corrosion analysis
   
   

TEST DE FINAL DE LABORATOR
Metode volumetrice si gravimetrice in studiul coroziunii

1. Coroziunea metalelor:
   1. poate fi redusa prin galvanizare;
   2. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   3. are loc pur si simplu prin expunerea la umiditate īn aer;
   4. poate furniza materii prime utile pentru analiza;
   5. este protectia de durata impotriva agentilor chimici;
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
3. Īn procesele de coroziune studiate:
   1. metalul isi schimba starea de oxidare pentru a deveni un anion;
   2. un gaz este eliberat numai la corodarea aluminiului;
   3. un gaz este eliberat numai la corodarea zincului;
   4. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   5. īntotdeauna metalul isi schimba starea de oxidare;
   
   
4. Pentru placa de zinc:
   1. a fost degresata īn solutie de acid sulfuric;
   2. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   3. a fost corodata īn solutie sulfuric;
   4. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   5. a fost implicata īn metoda volumetrica de analiza a coroziunii
   
   
5. Pentru placa de aluminiu:
   1. a fost corodata īn solutie de hidroxid de sodiu;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   5. masa este masurata īnainte si dupa imersia īn NaOH;
   
   

FINAL TEST AT LABORATORY
Volumetric and gravimetric methods in study of corrosion

1. The aluminum plate:
   1. was involved in the gravimetric method of corrosion analysis
   2. was involved in the volumetric method of corrosion analysis
   3. the surface is measured before and after immersing it in NaOH;
   4. the mass is measured before and after immersing it in NaOH;
   
   
2. In studied corrosion processes:
   1. a gas is released only the corrosion of zinc;
   2. the metal it changes its oxidation state becoming an cation;
   3. the metal it changes its oxidation state becoming an anion;
   4. a gas is released at both corrosion of zinc and aluminum;
   
   
3. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. ZnO + CO -> Zn + CO₂
   3. Fe₂O₃ + CO -> Fe + CO₂
   4. Ni(CO)₄ -> Ni + CO
   
   
4. Corrosion of metals:
   1. is helping in the process of cleaning the metals surfaces;
   2. is a beneficial process that shows the stability of metals;
   3. can be reduced by passivation;
   4. takes place merely from exposure to moisture in air;
   
   
5. The zinc plate:
   1. was involved in the volumetric method of corrosion analysis
   2. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   3. the surface is measured before and after immersing it in H₂SO₄;
   4. was degreased in sulfuric acid solution;
   
   

TEST DE FINAL DE LABORATOR
Metode volumetrice si gravimetrice in studiul coroziunii

1. Pentru placa de aluminiu:
   1. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. suprafata se masoara īnainte si dupa imersia īn NaOH;
   4. masa este masurata īnainte si dupa imersia īn NaOH;
   5. a fost degresata īn solutie de hidroxid de sodiu;
   
   
2. Īn procesele de coroziune studiate:
   1. un gaz este eliberat numai la corodarea zincului;
   2. metalul isi schimba starea de oxidare pentru a deveni un cation;
   3. metalul isi schimba starea de oxidare pentru a deveni un anion;
   4. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. ZnO + CO -> Zn + CO₂
   3. Fe₂O₃ + CO -> Fe + CO₂
   4. Ni(CO)₄ -> Ni + CO
   
   
4. Coroziunea metalelor:
   1. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   2. este un proces benefic care arata stabilitatea metalelor;
   3. poate fi redusa prin pasivare;
   4. are loc pur si simplu prin expunerea la umiditate īn aer;
   
   
5. Pentru placa de zinc:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   3. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   4. a fost degresata īn solutie de acid sulfuric;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. At the nickel plating following reactions took place:
   1. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   2. at anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   3. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   4. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the cathode: O^2- - 2e^- -> O₂⁰
   
   
2. Theoretical mass of nickel deposited is calculated using:
   1. perfect gas law;
   2. solutions laws;
   3. the conservation of the number of atoms for each element law;
   4. law of mass action;
   
   
3. It is expected to have a mass of nickel deposited:
   1. proportional with the surface of the sample;
   2. much lower than the calculated theoretical one;
   3. much higher than the calculated theoretical one;
   4. inversely proportional with the surface of the sample;
   
   
4. The intensity of the current:
   1. should be adjusted by the technicians, we have nothing to do there;
   2. is to be calculated after conducting the experiment;
   3. is to be adjusted when the experiment starts;
   4. affect only the quality of the nickel deposition;
   
   
5. Electrical conductivity of nickel salts solutions:
   1. depends on the intensity of the current used;
   2. depends on the potential of the source used;
   3. is improved by salts additions;
   4. is relatively high;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. La nichelare urmatoarele reactii au avut loc:
   1. la catod (-), īn legatura cu piesa metalica, Ni⁰ - 2e^- -> Ni²⁺
   2. la anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   3. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la anod: O^2- - 2e^- -> O₂⁰
   4. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la catod: O^2- - 2e^- -> O₂⁰
   
   
2. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea gazelor perfecte;
   2. legea solutilor;
   3. conservarea numarului de atomi pentru fiecare element;
   4. legea actiunii maselor;
   5. legea conservarii energiei;
   
   
3. Este de asteptat ca masa de nichel depus sa fie:
   1. proportionala cu suprafata probei;
   2. mult mai mica decāt cea teoretica calculata;
   3. mult mai mare decāt cea teoretica calculata;
   4. invers proportionala cu suprafata probei;
   
   
4. Intensitatea curentului:
   1. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   2. se calculeaza dupa efectuarea experimentului;
   3. trebuie sa fie ajustata cand se incepe experimentul;
   4. afecteaza numai calitatea depunerii nichelului;
   
   
5. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. depinde de intensitatea curentului utilizat;
   2. depinde de potentialul sursei utilizate;
   3. este īmbunatatita prin adaosuri de saruri;
   4. este relativ mare;
   5. este redusa prin adaosuri de saruri;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. The intensity of the current:
   1. does not affect the quality nor the quantity of the nickel deposition;
   2. is to be calculated after conducting the experiment;
   3. should be adjusted by the technicians, we have nothing to do there;
   4. is to be adjusted when the experiment starts;
   
   
2. It is expected to have a mass of nickel deposited:
   1. inversely proportional with the intensity of the current used;
   2. proportional with the nickel plating time;
   3. higher than the calculated theoretical one;
   4. much higher than the calculated theoretical one;
   
   
3. At the nickel plating following reactions took place:
   1. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   2. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   3. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   4. at anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   
   
4. Electrical conductivity of nickel salts solutions:
   1. is improved by salts additions;
   2. is reduced by salts additions;
   3. depends on the intensity of the current used;
   4. is relatively small;
   
   
5. Theoretical mass of nickel deposited is calculated using:
   1. the conservation of the energy law;
   2. solutions laws;
   3. the electrolysis law;
   4. the conservation of the number of atoms for each element law;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Intensitatea curentului:
   1. nu afecteaza calitatea nici cantitatea nichelului depus;
   2. se calculeaza dupa efectuarea experimentului;
   3. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   4. trebuie sa fie ajustata cand se incepe experimentul;
   
   
2. Este de asteptat ca masa de nichel depus sa fie:
   1. invers proportionala cu intensitatea curentului utilizat;
   2. proportionala cu timpul de nichelare;
   3. mai mare decāt cea teoretica calculata;
   4. mult mai mare decāt cea teoretica calculata;
   5. invers proportional cu timpul de nichelare;
   
   
3. La nichelare urmatoarele reactii au avut loc:
   1. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   2. la catod (-), īn legatura cu piesa metalica, Ni⁰ - 2e^- -> Ni²⁺
   3. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la anod: O^2- - 2e^- -> O₂⁰
   4. la anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   
   
4. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este īmbunatatita prin adaosuri de saruri;
   2. este redusa prin adaosuri de saruri;
   3. depinde de intensitatea curentului utilizat;
   4. este relativ mica;
   5. depinde de potentialul sursei utilizate;
   
   
5. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea conservarii energiei;
   2. legea solutilor;
   3. legea electrolizei;
   4. conservarea numarului de atomi pentru fiecare element;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. It is expected to have a mass of nickel deposited:
   1. inversely proportional with the surface of the sample;
   2. higher than the calculated theoretical one;
   3. proportional with the intensity of the current used;
   4. inversely proportional with the nickel plating time;
   
   
2. Theoretical mass of nickel deposited is calculated using:
   1. the electrolysis law;
   2. the conservation of the energy law;
   3. the conservation of the number of atoms for each element law;
   4. solutions laws;
   
   
3. The intensity of the current:
   1. is to be calculated before to start the experiment;
   2. should be adjusted by the technicians, we have nothing to do there;
   3. is to be adjusted when the experiment starts;
   4. affect only the quantity of the nickel deposition;
   
   
4. Electrical conductivity of nickel salts solutions:
   1. is reduced by salts additions;
   2. is relatively high;
   3. depends on the potential of the source used;
   4. is improved by salts additions;
   
   
5. At the nickel plating following reactions took place:
   1. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   2. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   3. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   4. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the cathode: O^2- - 2e^- -> O₂⁰
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Este de asteptat ca masa de nichel depus sa fie:
   1. invers proportionala cu suprafata probei;
   2. mai mare decāt cea teoretica calculata;
   3. proportionala cu intensitatea curentului utilizat;
   4. invers proportional cu timpul de nichelare;
   5. mult mai mare decāt cea teoretica calculata;
   
   
2. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea electrolizei;
   2. legea conservarii energiei;
   3. conservarea numarului de atomi pentru fiecare element;
   4. legea solutilor;
   5. legea gazelor perfecte;
   
   
3. Intensitatea curentului:
   1. trebuie sa fie calculata īnainte de a īncepe experimentul;
   2. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   3. trebuie sa fie ajustata cand se incepe experimentul;
   4. afecteaza numai cantitatea de nichel depus;
   
   
4. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este redusa prin adaosuri de saruri;
   2. este relativ mare;
   3. depinde de potentialul sursei utilizate;
   4. este īmbunatatita prin adaosuri de saruri;
   
   
5. La nichelare urmatoarele reactii au avut loc:
   1. la catod (-), īn legatura cu piesa metalica, Ni⁰ - 2e^- -> Ni²⁺
   2. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   3. la anod (+), īn contact cu piesa de nichel, Ni⁰ - 2e^- -> Ni²⁺
   4. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la catod: O^2- - 2e^- -> O₂⁰
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. The intensity of the current:
   1. should be adjusted by the technicians, we have nothing to do there;
   2. affect only the quality of the nickel deposition;
   3. is to be adjusted when the experiment starts;
   4. affect only the quantity of the nickel deposition;
   
   
2. At the nickel plating following reactions took place:
   1. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   2. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   3. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   4. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the cathode: O^2- - 2e^- -> O₂⁰
   
   
3. Theoretical mass of nickel deposited is calculated using:
   1. perfect gas law;
   2. the electrolysis law;
   3. the conservation of the energy law;
   4. the conservation of the number of atoms for each element law;
   
   
4. It is expected to have a mass of nickel deposited:
   1. much higher than the calculated theoretical one;
   2. proportional with the surface of the sample;
   3. proportional with the intensity of the current used;
   4. proportional with the nickel plating time;
   
   
5. Electrical conductivity of nickel salts solutions:
   1. is relatively small;
   2. depends on the potential of the source used;
   3. is reduced by salts additions;
   4. depends on the intensity of the current used;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Intensitatea curentului:
   1. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   2. afecteaza numai calitatea depunerii nichelului;
   3. trebuie sa fie ajustata cand se incepe experimentul;
   4. afecteaza numai cantitatea de nichel depus;
   
   
2. La nichelare urmatoarele reactii au avut loc:
   1. la anod (+), īn contact cu piesa de nichel, Ni⁰ - 2e^- -> Ni²⁺
   2. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la anod: O^2- - 2e^- -> O₂⁰
   3. la catod (-), īn legatura cu piesa metalica, Ni⁰ - 2e^- -> Ni²⁺
   4. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la catod: O^2- - 2e^- -> O₂⁰
   
   
3. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea gazelor perfecte;
   2. legea electrolizei;
   3. legea conservarii energiei;
   4. conservarea numarului de atomi pentru fiecare element;
   
   
4. Este de asteptat ca masa de nichel depus sa fie:
   1. mult mai mare decāt cea teoretica calculata;
   2. proportionala cu suprafata probei;
   3. proportionala cu intensitatea curentului utilizat;
   4. proportionala cu timpul de nichelare;
   
   
5. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este relativ mica;
   2. depinde de potentialul sursei utilizate;
   3. este redusa prin adaosuri de saruri;
   4. depinde de intensitatea curentului utilizat;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. It is expected to have a mass of nickel deposited:
   1. much lower than the calculated theoretical one;
   2. inversely proportional with the intensity of the current used;
   3. inversely proportional with the surface of the sample;
   4. lower than the calculated theoretical one;
   
   
2. Electrical conductivity of nickel salts solutions:
   1. depends on the intensity of the current used;
   2. is reduced by salts additions;
   3. is relatively small;
   4. is relatively high;
   
   
3. At the nickel plating following reactions took place:
   1. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   2. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   3. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the cathode: O^2- - 2e^- -> O₂⁰
   4. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   
   
4. Theoretical mass of nickel deposited is calculated using:
   1. law of mass action;
   2. perfect gas law;
   3. the conservation of the energy law;
   4. solutions laws;
   
   
5. The intensity of the current:
   1. does not affect the quality nor the quantity of the nickel deposition;
   2. is to be calculated after conducting the experiment;
   3. is to be adjusted when the experiment starts;
   4. should be adjusted by the technicians, we have nothing to do there;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Este de asteptat ca masa de nichel depus sa fie:
   1. mult mai mica decāt cea teoretica calculata;
   2. invers proportionala cu intensitatea curentului utilizat;
   3. invers proportionala cu suprafata probei;
   4. mai mica decāt cea teoretica calculata;
   5. proportionala cu intensitatea curentului utilizat;
   
   
2. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. depinde de intensitatea curentului utilizat;
   2. este redusa prin adaosuri de saruri;
   3. este relativ mica;
   4. este relativ mare;
   
   
3. La nichelare urmatoarele reactii au avut loc:
   1. la anod (+), īn contact cu piesa de nichel, Ni⁰ - 2e^- -> Ni²⁺
   2. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   3. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la catod: O^2- - 2e^- -> O₂⁰
   4. la catod (-), īn legatura cu piesa metalica, Ni⁰ - 2e^- -> Ni²⁺
   5. la anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   
   
4. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea actiunii maselor;
   2. legea gazelor perfecte;
   3. legea conservarii energiei;
   4. legea solutilor;
   5. legea electrolizei;
   
   
5. Intensitatea curentului:
   1. nu afecteaza calitatea nici cantitatea nichelului depus;
   2. se calculeaza dupa efectuarea experimentului;
   3. trebuie sa fie ajustata cand se incepe experimentul;
   4. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   5. afecteaza numai calitatea depunerii nichelului;