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

1. The chronometer is used in the experiment for:
   1. indication of the moment when we should pay attention to the experiment;
   2. measuring of the diffusion time;
   3. extracting the information necessary to calculate the speeds ratio;
   4. to keep us busy;
   
   
2. We may say the followings:
   1. the molecules have speeds only in gaseous state;
   2. diffusion process appears only in gaseous state;
   3. the molecules have energy only in gaseous and liquid states;
   4. diffusion process appears in all gaseous, liquid and solid states;
   
   
3. The position of the ring in the experiment is dependent on:
   1. the speed of diffusion of each involved species;
   2. the real speeds and not the virtual speeds of each involved species;
   3. the concentrations of the solutions used;
   4. the average energy or average speed of each involved species;
   
   
4. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. are considered to be at the same temperature, but may have different energies;
   2. all have same energy;
   3. all are moving in an arbitrary direction;
   4. all have same speed;
   
   
5. The fog observed during the experiment is due to:
   1. presence of the ammonia;
   2. unproper illumination in the laboratory or our breathing;
   3. presence of the chlorine;
   4. formation of ammonium chloride;
   
   

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

1. Cronometrul este utilizat īn experimentul pentru:
   1. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   2. masurarea timpului de difuzie;
   3. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   4. sa ne tina ocupati;
   
   
2. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au viteze numai īn stare gazoasa;
   2. proces de difuzie apare numai īn stare gazoasa;
   3. moleculele au energie numai īn stare gazoasa si lichida;
   4. proces de difuzie apare īn toate starile gazoasa, lichida si solida;
   
   
3. Pozitia inelului īn experimentul este dependenta de:
   1. viteza de difuzie a fiecarei specii implicate;
   2. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   3. concentratiile solutiilor utilizate;
   4. energia medie sau viteza medie a fiecarei specii implicate;
   5. viteza la moda sau energia la moda a fiecarei specii implicate;
   
   
4. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   2. toate au aceeasi energie;
   3. toate se īndreapta īntr-o directie arbitrara;
   4. toate au aceeasi viteza;
   5. toate se deplaseaza īn aceeasi directie;
   
   
5. Ceata observata īn timpul experimentului se datoreaza:
   1. prezentei amoniacului;
   2. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   3. prezentei clorului;
   4. formarea clorurii de amoniu;
   
   

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. formation of ammonium chloride;
   2. unproper illumination in the laboratory or our breathing;
   3. unproper illumination in the laboratory and our breathing;
   4. presence of the ammonia;
   
   
2. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. are considered to be at the same temperature, but may have different speeds;
   2. all are moving in an arbitrary direction;
   3. all are moving in the same direction;
   4. all have same speed;
   
   
3. At the ends of the tube following equilibrium reactions occurs:
   1. H⁺ + HO^- \=\ H₂O
   2. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   3. H₂O \=\ H⁺ + HO^-
   4. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
4. We may say the followings:
   1. the kinetic energy of a molecule is affected by temperature and pressure;
   2. the molecules have speeds only in gaseous and liquid states;
   3. the molecules have energy in all gaseous, liquid and solid states;
   4. the molecules have speeds in all gaseous, liquid and solid states;
   
   
5. The position of the ring in the experiment is dependent on:
   1. the real speeds and not the virtual speeds of each involved species;
   2. the length of the tube and the width of the tube;
   3. the virtual speeds and not the real speeds of each involved species;
   4. the propagation of the species as ions and not as neutral molecules;
   
   

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

1. Ceata observata īn timpul experimentului se datoreaza:
   1. formarea clorurii de amoniu;
   2. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   3. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   4. prezentei amoniacului;
   
   
2. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   2. toate se īndreapta īntr-o directie arbitrara;
   3. toate se deplaseaza īn aceeasi directie;
   4. toate au aceeasi viteza;
   5. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   
   
3. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H⁺ + HO^- \=\ H₂O
   2. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   3. H₂O \=\ H⁺ + HO^-
   4. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
4. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. energia cinetica a unei molecule este afectata de temperatura si presiune;
   2. moleculele au viteze numai īn stare gazoasa si lichida;
   3. moleculele au energie īn toate starile gazoasa, lichida si solida;
   4. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   5. moleculele au energie numai īn stare gazoasa si lichida;
   
   
5. Pozitia inelului īn experimentul este dependenta de:
   1. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   2. lungimea tubului si latimea tubului;
   3. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   4. propagarea speciilor ca ionii si nu ca si molecule neutre;
   
   

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

1. The chronometer is used in the experiment for:
   1. to keep us busy;
   2. indication of the moment when we should pay attention to the experiment;
   3. measuring of the diffusion time;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
2. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. are considered to be at the same temperature, but may have different energies;
   2. all have same energy;
   3. all have same speed;
   4. all are moving in the same direction;
   
   
3. We may say the followings:
   1. the kinetic energy of a molecule is affected by temperature only;
   2. the molecules have energy in all gaseous, liquid and solid states;
   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. 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. unproper illumination in the laboratory and our breathing;
   
   
5. 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 propagation of the species as ions and not as neutral molecules;
   3. the propagation of the species as neutral molecules and not as ions;
   4. the mode energy or mode speed of each involved species;
   
   

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

1. Cronometrul este utilizat īn experimentul pentru:
   1. sa ne tina ocupati;
   2. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   3. masurarea timpului de difuzie;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   5. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   
   
2. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   2. toate au aceeasi energie;
   3. toate au aceeasi viteza;
   4. toate se deplaseaza īn aceeasi directie;
   
   
3. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. energia cinetica a unei molecule este afectata de numai temperatura;
   2. moleculele au energie īn toate starile gazoasa, lichida si solida;
   3. moleculele au viteze numai īn stare gazoasa si lichida;
   4. moleculele au energie numai īn stare gazoasa;
   5. proces de difuzie apare īn toate starile gazoasa, lichida si solida;
   
   
4. 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. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   5. prezentei clorului;
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si latimea tubului;
   2. propagarea speciilor ca ionii si nu ca si molecule neutre;
   3. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   4. viteza la moda sau energia la moda a fiecarei specii implicate;
   5. lungimea tubului si nu latimea tubului;
   
   

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. H⁺ + HO^- \=\ H₂O
   3. NH₃ + HCl \=\ NH₄Cl
   4. H₂O \=\ H⁺ + HO^-
   
   
2. The position of the ring in the experiment is dependent on:
   1. the speed of diffusion of each involved species;
   2. the real speeds and not the virtual speeds of each involved species;
   3. the length of the tube and the width of the tube;
   4. the virtual speeds and not the real speeds of each involved species;
   
   
3. The time to the formation of the ring in the experiment is dependent on:
   1. the concentrations of the solutions used;
   2. the propagation of the species as ions and not as neutral molecules;
   3. the length of the tube and not of the width of the tube;
   4. the length of the tube and the width of the tube;
   
   
4. We may say the followings:
   1. diffusion process appears only in gaseous and liquid states;
   2. the kinetic energy of a molecule is affected by temperature only;
   3. the molecules have speeds only in gaseous state;
   4. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   
   
5. The fog observed during the experiment is due to:
   1. presence of the chlorine;
   2. formation of ammonium chloride;
   3. our experiment designed to trap the product of the reaction;
   4. unproper illumination in the laboratory and our breathing;
   
   

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. H⁺ + HO^- \=\ H₂O
   3. NH₃ + HCl \=\ NH₄Cl
   4. H₂O \=\ H⁺ + HO^-
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. viteza de difuzie a fiecarei specii implicate;
   2. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   3. lungimea tubului si latimea tubului;
   4. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   5. concentratiile solutiilor utilizate;
   
   
3. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. concentratiile solutiilor utilizate;
   2. propagarea speciilor ca ionii si nu ca si molecule neutre;
   3. lungimea tubului si nu latimea tubului;
   4. lungimea tubului si latimea tubului;
   5. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   
   
4. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. proces de difuzie apare numai īn stare gazoasa si lichida;
   2. energia cinetica a unei molecule este afectata de numai temperatura;
   3. moleculele au viteze numai īn stare gazoasa;
   4. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   
   
5. Ceata observata īn timpul experimentului se datoreaza:
   1. prezentei clorului;
   2. formarea clorurii de amoniu;
   3. experimentului nostru proiectat pentru a captura produsul de reactie;
   4. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   5. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   
   

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 concentrations of the solutions used;
   2. the speed of diffusion of each involved species;
   3. the average energy or average speed of each involved species;
   4. the propagation of the species as ions and not as neutral molecules;
   
   
2. At the ends of the tube following equilibrium reactions occurs:
   1. H₂O \=\ H⁺ + HO^-
   2. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
3. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory and our breathing;
   2. unproper illumination in the laboratory or our breathing;
   3. our experiment designed to trap the product of the reaction;
   4. presence of the ammonia;
   
   
4. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. are considered to be at the same temperature, but may have different energies;
   2. all are moving in the same direction;
   3. are considered to be at the same temperature, but may have different speeds;
   4. all have same speed;
   
   
5. The chronometer is used in the experiment for:
   1. synchronization of the diffusion times;
   2. measuring of the diffusion time;
   3. extracting the information necessary to calculate the diffusion coefficients;
   4. to keep us busy;
   
   

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

1. Pozitia inelului īn experimentul este dependenta de:
   1. concentratiile solutiilor utilizate;
   2. viteza de difuzie a fiecarei specii implicate;
   3. energia medie sau viteza medie a fiecarei specii implicate;
   4. propagarea speciilor ca ionii si nu ca si molecule neutre;
   
   
2. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H₂O \=\ H⁺ + HO^-
   2. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
3. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   2. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   3. experimentului nostru proiectat pentru a captura produsul de reactie;
   4. prezentei amoniacului;
   5. formarea clorurii de amoniu;
   
   
4. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   2. toate se deplaseaza īn aceeasi directie;
   3. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   4. toate au aceeasi viteza;
   5. toate au aceeasi energie;
   
   
5. Cronometrul este utilizat īn experimentul pentru:
   1. sincronizarea timpilor de difuzie;
   2. masurarea timpului de difuzie;
   3. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   4. sa ne tina ocupati;
   5. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   
   

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 which may involve some constants dependent of gas composition;
   2. a relation which takes into account certain deviations from the ideal model;
   3. a relation which is always true, independent of the values of the state parameters;
   4. a relation between an unlimited number of state parameters;
   
   
2. 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. 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. we possess enough information to decide what gas was released from the reaction;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KNO₃ -> KNO₂ + O₂;
   2. KCl + O₂ -> KClO₃;
   3. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   4. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   
   
4. For gaseous state:
   1. the pressure is approximately the same as in liquid state;
   2. it exists an equation for all, p · V = n · R · T;
   3. the pressure is much lower than in liquid state;
   4. the pressure depends on the model which are used to approximate it;
   
   
5. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. increasing of the temperature of a solid mass when was heated;
   3. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   4. the lost of the mass of a solid as result of producing of some gas;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. O ecuatie de stare pentru un gaz real este:
   1. o relatie care poate implica unele constante dependente de compozitia gazului;
   2. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   3. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   4. o relatie īntre un numar nelimitat de parametri de stare;
   5. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   
   
2. 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. 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. 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. KNO₃ -> KNO₂ + O₂;
   2. KCl + O₂ -> KClO₃;
   3. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   4. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   
   
4. Pentru stare gazoasa:
   1. presiunea este aproximativ aceeasi ca si īn stare lichida;
   2. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   3. presiunea este mult mai mica decāt īn stare lichida;
   4. presiunea depinde de modelul care este utilizat pentru o aproxima;
   5. presiunea este mult mai mare decāt īn stare lichida;
   
   
5. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   3. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   4. pierdut din masa de solid ca urmare a producerii unor gaze;
   5. cresterea presiunii unui gaz cānd s-a īncalzit;
   
   

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

1. In the laboratory were studied:
   1. the lost of the mass of a solid as result of producing of some gas;
   2. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   3. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   4. increasing of the temperature of a solid mass when was heated;
   
   
2. 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 possess enough information to decide what gas was released from the reaction;
   3. air were released as result of the decomposition;
   4. oxigen were released as result of the decomposition;
   
   
3. 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 depends on the model which are used to approximate it;
   4. the pressure is subject to change when a chemical reaction occurs;
   
   
4. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KClO₃ -> KCl + O₂;
   2. Ag₂O -> Ag + O₂;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. KNO₃ -> KNO₂ + O₂;
   
   
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. a relation which may involve some constants dependent of gas composition;
   3. a relation derived to approximate the relation between state parameters;
   4. a relation obtained after conducting of the experiment;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. pierdut din masa de solid ca urmare a producerii unor gaze;
   2. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   4. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   5. cresterea presiunii unui gaz cānd s-a īncalzit;
   
   
2. 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. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. aer a fost eliberat ca urmare a descompunerii;
   4. oxigenul au fost eliberat ca urmare a descompunerii;
   5. ozonul au fost eliberat ca urmare a descompunerii;
   
   
3. 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 depinde de modelul care este utilizat pentru o aproxima;
   4. presiunea se pot modifica atunci cānd apare o reactie chimica;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KClO₃ -> KCl + O₂;
   2. Ag₂O -> Ag + O₂;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. KNO₃ -> KNO₂ + O₂;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   2. o relatie care poate implica unele constante dependente de compozitia gazului;
   3. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   4. o relatie obtinut dupa efectuarea experimentului;
   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. 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. air were released as result of the decomposition;
   3. the ideal model of a gas approximated the best the behavior of the released gas;
   4. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   
   
2. In the laboratory were studied:
   1. the lost of the mass of a solid as result of producing of some gas;
   2. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   3. increasing of the pressure of a gas when was heated;
   4. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   
   
3. A state equation for a real gas is:
   1. a relation which may involve some constants dependent of gas composition;
   2. a relation which takes into account certain deviations from the ideal model;
   3. a relation between an certain number of state parameters;
   4. a relation which is always true, independent of the values of the state parameters;
   
   
4. For gaseous state:
   1. it exists an equation for all, p · V = n · R · T;
   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 much lower than in liquid state;
   
   
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. KCl + O₂ -> KClO₃;
   
   

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. aer a fost eliberat ca urmare a descompunerii;
   3. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   4. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   
   
2. Īn laborator s-au studiat:
   1. pierdut din masa de solid ca urmare a producerii unor gaze;
   2. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   3. cresterea presiunii unui gaz cānd s-a īncalzit;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   
   
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 care sa tina cont de anumite abateri de la modelul ideal;
   3. o relatie īntre un anumit numar de parametri de stare;
   4. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   
   
4. Pentru stare gazoasa:
   1. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   2. presiunea este aproximativ aceeasi ca si īn stare lichida;
   3. presiunea este neschimbata cānd apare o reactie chimica;
   4. presiunea este mult mai mica decāt īn stare lichida;
   
   
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. KCl + O₂ -> KClO₃;
   
   

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 which is always true, independent of the values of the state parameters;
   2. a relation which may involve some constants dependent of gas composition;
   3. a relation derived to approximate the relation between state parameters;
   4. a relation which takes into account certain deviations from the ideal model;
   
   
2. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O + O₂ -> H₂O₂;
   2. distillation of the liquid air;
   3. opening a bubble water bottle;
   4. KNO₂ + O₂ -> KNO₃;
   
   
3. In the laboratory were studied:
   1. increasing of the pressure of a gas when was heated;
   2. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   3. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   4. increasing of the temperature of a solid mass when was heated;
   
   
4. For gaseous state:
   1. the pressure is subject to change when a chemical reaction occurs;
   2. it exists an equation for all, p · V = n · R · T;
   3. the pressure is exactly the same as in liquid state;
   4. the pressure depends on the model which are used to approximate it;
   
   
5. The values taken from the experiment conducted in the laboratory indicated that:
   1. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   2. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   3. the ideal model of a gas approximated the worst the behavior of the released gas;
   4. the ideal model of a gas approximated the best the behavior of the released gas;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. O ecuatie de stare pentru un gaz real este:
   1. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   2. o relatie care poate implica unele constante dependente de compozitia gazului;
   3. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   4. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   5. o relatie īntre un anumit numar de parametri de stare;
   
   
2. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O + O₂ -> H₂O₂;
   2. distilarea aerului lichid;
   3. deschiderea unei sticle de apa cu bule;
   4. KNO₂ + O₂ -> KNO₃;
   5. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   
   
3. Īn laborator s-au studiat:
   1. cresterea presiunii unui gaz cānd s-a īncalzit;
   2. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   3. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   4. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   
   
4. Pentru stare gazoasa:
   1. presiunea se pot modifica atunci cānd apare o reactie chimica;
   2. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   3. presiunea este exact la fel ca si īn stare lichida;
   4. presiunea depinde de modelul care este utilizat pentru o aproxima;
   
   
5. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   2. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   4. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   
   

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

1. In the laboratory were studied:
   1. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   2. the lost of the mass of a solid as result of producing of some gas;
   3. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   4. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   
   
2. A state equation for a real gas is:
   1. a relation derived to approximate the relation between state parameters;
   2. a relation between an certain number of state parameters;
   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;
   
   
3. For gaseous state:
   1. the pressure is unchanged when a chemical reaction occurs;
   2. the pressure is much lower than in liquid state;
   3. we need to take supplementary precautions in the laboratory;
   4. it exists an equation for all, p · V = n · R · T;
   
   
4. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KClO₃ -> KCl + O₂;
   2. distillation of the liquid air;
   3. H₂O + O₂ -> H₂O₂;
   4. Ag + O₂ -> Ag₂O;
   
   
5. The values taken from the experiment conducted in the laboratory indicated that:
   1. ozone were released as result of the decomposition;
   2. the ideal model of a gas approximated the best the behavior of the released gas;
   3. oxigen were released as result of the decomposition;
   4. the ideal model of a gas approximated the worst the behavior of the released gas;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   2. pierdut din masa de solid ca urmare a producerii unor gaze;
   3. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   
   
2. O ecuatie de stare pentru un gaz real este:
   1. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   2. o relatie īntre un anumit numar de parametri de stare;
   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;
   
   
3. Pentru stare gazoasa:
   1. presiunea este neschimbata cānd apare o reactie chimica;
   2. presiunea este mult mai mica decāt īn stare lichida;
   3. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   4. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KClO₃ -> KCl + O₂;
   2. distilarea aerului lichid;
   3. H₂O + O₂ -> H₂O₂;
   4. Ag + O₂ -> Ag₂O;
   
   
5. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. ozonul au fost eliberat ca urmare a descompunerii;
   2. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   3. oxigenul au fost eliberat ca urmare a descompunerii;
   4. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. 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;
   
   
2. When aluminum is identified:
   1. is identified as Al¹⁺ cation;
   2. only one identification reaction is possible;
   3. is identified as Al³⁺ cation;
   4. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   
   
3. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   2. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
4. This method of analysis of metals and alloys is:
   1. useful for pure metals, not so useful for alloys;
   2. useful for alloys, not so useful for metals;
   3. a quantitative method of analysis;
   4. a gravimetric method of analysis;
   
   
5. When lead is identified:
   1. a heat release is observed;
   2. a yellow complex appears;
   3. interference of other ions may affect the outcome;
   4. a red-brown complex appears;
   
   

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 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;
   
   
2. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al¹⁺;
   2. doar o reactie de identificare este posibila;
   3. este identificat ca cationul Al³⁺;
   4. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   
   
3. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   2. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
4. Aceasta metoda de analiza de metale si aliaje este:
   1. utila pentru metale pure, nu atāt de utila pentru aliaje;
   2. utila pentru aliaje, nu atāt de utila pentru metale;
   3. o metoda cantitativa de analiza;
   4. o metoda gravimetrica de analiza;
   
   
5. Cānd plumbul este identificat:
   1. se observa o eliberare de caldura;
   2. apare un complex galben;
   3. interferenta altor ioni poate afecta rezultatul;
   4. apare un complex rosu-brun;
   5. apare un complex albastru;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. Why moisten the paper with solution of sodium nitrate?
   1. for stopping after a while the chemical reaction that takes place;
   2. for the paper to work as isolator;
   3. to be cut easily with scissors;
   4. to have something to do in the laboratory;
   
   
2. When lead is identified:
   1. a violet complex appears;
   2. the reactions used clearly indicates its presence;
   3. interference of other ions may affect the outcome;
   4. precautions should be made for toxic wastes disposal;
   
   
3. When the electrical circuit is closed:
   1. elements from the solution are passed into sample as metals;
   2. elements from the metals are passed into solution as cations;
   3. elements from the metals are passed into solution as anions;
   4. water dissociation is inhibited;
   
   
4. When aluminum is identified:
   1. the presence of other ions may produce a true positive outcome;
   2. there are many identification reactions possible;
   3. the presence of other ions may produce a false positive outcome;
   4. supplementary precautions should be taken, because the plates are made from aluminum too;
   
   
5. The paper requires before analysis of the sample:
   1. to be moistened with an electrolyte;
   2. to be tested;
   3. to measure its surface;
   4. to be weighted;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru oprirea dupa un timp reactiei chimice care are loc;
   2. pentru ca hartia sa actioneze ca izolator;
   3. sa fie taiat cu usurinta cu foarfeca;
   4. pentru a avea ceva de a face īn laborator;
   5. pentru furniza cationi pentru analiza;
   
   
2. Cānd plumbul este identificat:
   1. apare un complex violet;
   2. reactiile utilizate īn mod clar ii indica prezenta;
   3. interferenta altor ioni poate afecta rezultatul;
   4. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   5. sunt utilizate substante periculoase;
   
   
3. Cānd circuitul electric este īnchis:
   1. elemente din solutie sunt trecute īn proba ca metale;
   2. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   3. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   4. disocierea apei este inhibata;
   
   
4. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   2. exista multe reactii posibile de identificare;
   3. prezenta altor ioni poate produce un rezultat fals pozitiv;
   4. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   5. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   
   
5. Hartia necesita ca īnainte de analiza probei:
   1. sa fie umezita cu un electrolit;
   2. sa fie testata;
   3. sa i se masoare suprafata;
   4. sa fie cantarita;
   5. sa fie acidulata;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When aluminum is identified:
   1. is identified as Al³⁺ cation;
   2. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   3. the presence of other ions may produce a true positive outcome;
   4. supplementary precautions should be taken, because the plates are made from aluminum too;
   
   
2. This method of analysis of metals and alloys is:
   1. a destructive method of analysis;
   2. not useful for both metals and alloys;
   3. a nondestructive method of analysis;
   4. a gravimetric method of analysis;
   
   
3. Why moisten the paper with solution of sodium nitrate?
   1. for the paper to work as isolator;
   2. to provide cations for analysis;
   3. for stopping after a while the chemical reaction that takes place;
   4. to be cut easily with scissors;
   
   
4. The paper requires before analysis of the sample:
   1. to be burned;
   2. to be tested;
   3. to measure its surface;
   4. to be dry;
   
   
5. When lead is identified:
   1. a violet complex appears;
   2. a heat release is observed;
   3. a yellow complex appears;
   4. the reactions used clearly indicates its presence;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al³⁺;
   2. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   3. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   4. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   5. este identificat ca cationul Al²⁺;
   
   
2. Aceasta metoda de analiza de metale si aliaje este:
   1. o metoda distructiva de analiza;
   2. nu este utila nici pentru metale nici pentru aliaje;
   3. o metoda nedistructiva de analiza;
   4. o metoda gravimetrica de analiza;
   5. utila atāt pentru metale si aliaje;
   
   
3. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru ca hartia sa actioneze ca izolator;
   2. pentru furniza cationi pentru analiza;
   3. pentru oprirea dupa un timp reactiei chimice care are loc;
   4. sa fie taiat cu usurinta cu foarfeca;
   5. pentru a avea ceva de a face īn laborator;
   
   
4. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa fie testata;
   3. sa i se masoare suprafata;
   4. sa fie uscata;
   5. sa fie acidulata;
   
   
5. Cānd plumbul este identificat:
   1. apare un complex violet;
   2. se observa o eliberare de caldura;
   3. apare un complex galben;
   4. reactiile utilizate īn mod clar ii indica prezenta;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   
   
2. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as anions;
   2. anions from the solution are passed into sample as metals;
   3. cations from the solution are passed into sample as metals;
   4. surface of the sample is fastly covered by a protecting shield of electrons;
   
   
3. When aluminum is identified:
   1. supplementary precautions should be taken, because the plates are made from aluminum too;
   2. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   3. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   4. using of alizarin along with ammonium hidroxide provide a red colored complex;
   
   
4. The paper requires before analysis of the sample:
   1. to be burned;
   2. to measure its surface;
   3. to be tested;
   4. to be acidified;
   
   
5. Why moisten the paper with solution of sodium nitrate?
   1. for stopping after a while the chemical reaction that takes place;
   2. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   3. for the paper to work as isolator;
   4. to accomodate ourselves to use chemicals;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   5. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   
   
2. Cānd circuitul electric este īnchis:
   1. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   2. anionii din solutie sunt trecuti īn proba ca metale;
   3. cationii din solutie sunt trecuti īn proba ca metale;
   4. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   5. elemente din solutie sunt trecute īn proba ca metale;
   
   
3. Cānd aluminiu este identificat:
   1. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   2. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   3. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   4. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   
   
4. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa i se masoare suprafata;
   3. sa fie testata;
   4. sa fie acidulata;
   5. sa fie uscata;
   
   
5. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru oprirea dupa un timp reactiei chimice care are loc;
   2. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   3. pentru ca hartia sa actioneze ca izolator;
   4. sa ne acomodam in a utiliza substante chimice;
   5. pentru furniza cationi pentru analiza;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The paper requires before analysis of the sample:
   1. to measure its surface;
   2. to be dry;
   3. to be acidified;
   4. to be moistened with an electrolyte;
   
   
2. When aluminum is identified:
   1. there are many identification reactions possible;
   2. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   3. supplementary precautions should be taken, because the plates are made from aluminum too;
   4. only one identification reaction is possible;
   
   
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. to be cut easily with scissors;
   3. for stopping after a while the chemical reaction that takes place;
   4. to provide cations for analysis;
   
   
4. When lead is identified:
   1. dangerous substances are used;
   2. interference of other ions may affect the outcome;
   3. a blue complex appears;
   4. a violet complex appears;
   
   
5. When the electrical circuit is closed:
   1. electric current passes the sample and the paper;
   2. water dissociation is inhibited;
   3. elements from the solution are passed into sample as metals;
   4. elements from the metals are passed into solution as cations;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Hartia necesita ca īnainte de analiza probei:
   1. sa i se masoare suprafata;
   2. sa fie uscata;
   3. sa fie acidulata;
   4. sa fie umezita cu un electrolit;
   5. sa fie taiata īn bucati mici;
   
   
2. Cānd aluminiu este identificat:
   1. exista multe reactii posibile de identificare;
   2. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   3. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   4. doar o reactie de identificare este posibila;
   5. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   
   
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. sa fie taiat cu usurinta cu foarfeca;
   3. pentru oprirea dupa un timp reactiei chimice care are loc;
   4. pentru furniza cationi pentru analiza;
   
   
4. Cānd plumbul este identificat:
   1. sunt utilizate substante periculoase;
   2. interferenta altor ioni poate afecta rezultatul;
   3. apare un complex albastru;
   4. apare un complex violet;
   
   
5. Cānd circuitul electric este īnchis:
   1. curent electric trece prin proba si hārtie;
   2. disocierea apei este inhibata;
   3. elemente din solutie sunt trecute īn proba ca metale;
   4. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   5. cationii din solutie sunt trecuti īn proba ca metale;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. Titration as a laboratory operation involves:
   1. a sulphuric acid solution;
   2. a volume measurement;
   3. a burette;
   4. a natrium hydroxide solution;
   
   
2. A redox process:
   1. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   2. involves changing of the aggregation states of some participants to the reaction;
   3. involves changing of the oxidation states of some participants to the reaction;
   4. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
3. The density of the solutions depends on:
   1. provider;
   2. temperature;
   3. quantity;
   4. pressure;
   
   
4. The equivalence point is:
   1. something rarely encountered in chemistry;
   2. the point in which a reactive should be added in the burette;
   3. the point in which a reactive should be added in the reaction flask;
   4. used to balance the equation;
   
   
5. In the calculations:
   1. are necessary to draw the tables in our notebooks after completing of the experiment;
   2. are necessary to take some information from reagent bottles;
   3. are necessary to use some formulas expressing in different ways the concentration;
   4. are necessary to establish the coefficients of the chemical reaction;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Titrarea ca o operatiune de laborator implica:
   1. o solutie de acid sulfuric;
   2. masurarea volumului;
   3. o biureta;
   4. o solutie de hidroxid de sodiu;
   5. masurarea masei;
   
   
2. Un proces redox:
   1. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   2. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   3. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   4. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   5. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
3. Densitatea solutiilor depinde de:
   1. furnizor;
   2. temperatura;
   3. cantitate;
   4. presiune;
   5. concentratie;
   
   
4. Punctul de echivalenta este:
   1. ceva rar īntālnit īn chimie;
   2. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   4. folosit pentru a echilibra ecuatia;
   5. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   
   
5. In calcule:
   1. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   2. este necesar a se lua unele informatii de pe sticlele de reactivi;
   3. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   4. este necesara stabilirea coeficientilor reactiei chimice;
   5. este necesar sa utilizam telefoanele;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The indicator should be added:
   1. to provide a color change at equivalence point;
   2. only at the suggestion of the supervisor;
   3. to indicate our safety limits when we dealt with chemicals;
   4. in large quantities, according to the principle 'only size matters';
   
   
2. A redox process:
   1. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   2. involves changing of the oxidation states of some participants to the reaction;
   3. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
3. Reactions between acids and bases:
   1. are all exothermic, being therefore dangerous outside of the laboratory;
   2. have as effect the change of the color of a solution;
   3. are rarely useful, and even rarely used;
   4. always have as a consequence the formation of a quantity of water;
   
   
4. In the calculations:
   1. are necessary to draw the tables in our notebooks after completing of the experiment;
   2. are necessary to take some information from reagent bottles;
   3. are necessary to use some formulas expressing in different ways the concentration;
   4. are necessary to establish the coefficients of the chemical reaction;
   
   
5. The equivalence point is:
   1. the point in which a reactive is fully consumed in the reaction;
   2. used to balance the equation;
   3. indicated when a color change is observed into the solution;
   4. the point in which a reactive should be added in the reaction flask;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Trebuie adaugat indicatorul:
   1. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   2. numai la sugestia supraveghetorului;
   3. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   4. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   5. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   
   
2. Un proces redox:
   1. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   2. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   3. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   5. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   
   
3. Reactiile īntre acizi si baze:
   1. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   2. au ca efect schimbarea culorii unei solutii;
   3. sunt rareori utile, si chiar mai rar utilizate;
   4. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   
   
4. In calcule:
   1. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   2. este necesar a se lua unele informatii de pe sticlele de reactivi;
   3. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   4. este necesara stabilirea coeficientilor reactiei chimice;
   
   
5. Punctul de echivalenta este:
   1. punctul īn care un reactiv este consumat complet īn reactie;
   2. folosit pentru a echilibra ecuatia;
   3. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   4. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. A redox process:
   1. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. occurs only when we mix wrong substances in the laboratory;
   3. involves changing of the oxidation states of some participants to the reaction;
   4. is always fast and safe;
   
   
2. The equivalence point is:
   1. indicated when a color change is observed into the solution;
   2. the point in which a reactive should be added in the reaction flask;
   3. something rarely encountered in chemistry;
   4. the point in which a reactive is fully consumed in the reaction;
   
   
3. When a chemical reaction is balanced, following should be considered:
   1. all glassware should be clean before, after and during the experiment;
   2. all glassware should be clean before and after conducting the experiment;
   3. the principle of the conservation of the number of atoms for each element;
   4. the principle of the conservation of the volume;
   
   
4. Titration as a laboratory operation involves:
   1. a salt solution;
   2. a standard or referential reactive;
   3. a volume measurement;
   4. a pH-metter;
   
   
5. The density of the solutions depends on:
   1. temperature;
   2. time elapsed since were prepared;
   3. concentration;
   4. pressure;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Un proces redox:
   1. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. apare numai atunci cānd se amesteca substante gresit īn laborator;
   3. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   4. este īntotdeauna rapid si sigur;
   
   
2. Punctul de echivalenta este:
   1. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   2. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   3. ceva rar īntālnit īn chimie;
   4. punctul īn care un reactiv este consumat complet īn reactie;
   
   
3. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   2. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   3. principiul conservarii numarul de atomi pentru fiecare element;
   4. principiul conservarii volumului;
   5. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   
   
4. Titrarea ca o operatiune de laborator implica:
   1. o solutie de sare;
   2. un standard sau reactiv de referinta;
   3. masurarea volumului;
   4. un pH-metru;
   
   
5. Densitatea solutiilor depinde de:
   1. temperatura;
   2. timpul scurs de cand au fost pregatite;
   3. concentratie;
   4. presiune;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. In the calculations:
   1. are necessary to establish the coefficients of the chemical reaction;
   2. are necessary to take the results imediatly after these are available from others;
   3. are necessary to draw the tables in our notebooks after completing of the experiment;
   4. are necessary to use our phones;
   
   
2. The equivalence point is:
   1. something rarely encountered in chemistry;
   2. the point in which a reactive should be added in the burette;
   3. the point in which a reactive should be added in the reaction flask;
   4. the point in which a reactive is fully consumed in the reaction;
   
   
3. The indicator should be added:
   1. to indicate our safety limits when we dealt with chemicals;
   2. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   3. in small quantities, to avoid the errors in observations and in calculations;
   4. in large quantities, according to the principle 'only size matters';
   
   
4. A redox process:
   1. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. involves a transfer of electrons from one atom or group of atoms to another;
   3. involves changing of the aggregation states of some participants to the reaction;
   4. occurs only when we mix wrong substances in the laboratory;
   
   
5. Titration as a laboratory operation involves:
   1. a standard or referential reactive;
   2. a pH-metter;
   3. a salt solution;
   4. a sulphuric acid solution;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. In calcule:
   1. este necesara stabilirea coeficientilor reactiei chimice;
   2. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   3. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   4. este necesar sa utilizam telefoanele;
   
   
2. Punctul de echivalenta este:
   1. ceva rar īntālnit īn chimie;
   2. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   4. punctul īn care un reactiv este consumat complet īn reactie;
   
   
3. Trebuie adaugat indicatorul:
   1. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   2. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   3. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   4. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   5. numai la sugestia supraveghetorului;
   
   
4. Un proces redox:
   1. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   3. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   4. apare numai atunci cānd se amesteca substante gresit īn laborator;
   5. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
5. Titrarea ca o operatiune de laborator implica:
   1. un standard sau reactiv de referinta;
   2. un pH-metru;
   3. o solutie de sare;
   4. o solutie de acid sulfuric;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. Titration as a laboratory operation involves:
   1. a pH-metter;
   2. a mass measurement;
   3. a burette;
   4. a sulphuric acid solution;
   
   
2. Reactions between acids and bases:
   1. are rarely useful, and even rarely used;
   2. have as a consequence the dissolution of a salt;
   3. have as effect the change of the color of a solution;
   4. are always fast, taking place almost instantaneously;
   
   
3. The density of the solutions depends on:
   1. temperature;
   2. concentration;
   3. pressure;
   4. provider;
   
   
4. A redox process:
   1. is always fast and safe;
   2. involves a transfer of electrons from one atom or group of atoms to another;
   3. involves changing of the oxidation states of some participants to the reaction;
   4. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
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. the principle of the conservation of the volume;
   4. all glassware should be clean before, after and during the experiment;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Titrarea ca o operatiune de laborator implica:
   1. un pH-metru;
   2. masurarea masei;
   3. o biureta;
   4. o solutie de acid sulfuric;
   5. masurarea volumului;
   
   
2. Reactiile īntre acizi si baze:
   1. sunt rareori utile, si chiar mai rar utilizate;
   2. au drept consecinta dizolvarea unei sari;
   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;
   
   
3. Densitatea solutiilor depinde de:
   1. temperatura;
   2. concentratie;
   3. presiune;
   4. furnizor;
   5. cantitate;
   
   
4. Un proces redox:
   1. este īntotdeauna rapid si sigur;
   2. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   3. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   4. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
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. principiul conservarii volumului;
   4. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   2. HCl + HO^- -> H₂O + Cl^-
   3. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
2. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. for complexing of Na¹⁺ and K¹⁺ ions;
   3. as reagent for determining the hardness of the water;
   4. for safety precautions purposes;
   
   
3. In the laboratory were analyzed:
   1. the mass of the water;
   2. the hardness of the water;
   3. the temperature of the water;
   4. the boiling point of the water;
   
   
4. For a water sample following measures may be quantitatively expressed:
   1. purity;
   2. total acidity;
   3. color;
   4. mineral acidity;
   
   
5. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Cl^- -> NaCl + HO^-
   2. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   
   

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 + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   2. HCl + HO^- -> H₂O+Cl^-
   3. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   5. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   
   
2. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   3. ca reactiv pentru determinarea duritatii apei;
   4. ca masura de siguranta;
   
   
3. Īn laborator au fost analizate:
   1. masa apei;
   2. duritatea apei;
   3. temperatura apei;
   4. punctul de fierbere al apei;
   5. aciditatea apei;
   
   
4. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. puritate;
   2. aciditate totala;
   3. culoare;
   4. aciditate minerala;
   5. duritate;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + Cl^- -> NaCl + HO^-
   2. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   
   

FINAL TEST AT LABORATORY
Water analysis

1. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. as reagent for determining the hardness of the water;
   3. for indication of the equilibrium point in the reaction;
   4. for safety precautions purposes;
   
   
2. 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 + CH₃COO⁺ -> CH₃COONa + HO⁺
   
   
3. We may say the followings:
   1. water is pure only when is taken from a good freshwater mountain stream;
   2. water is a good polar solvent;
   3. purification of the water may include biological processes;
   4. when water contains dissolved minerals and gases is bad for drinking;
   
   
4. In the laboratory were analyzed:
   1. the concentration of the water;
   2. the boiling point of the water;
   3. the acidity of the water;
   4. the softness of the water;
   
   
5. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   3. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   4. HCl + HO^- -> H₂O + Cl^-
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. ca reactiv pentru determinarea duritatii apei;
   3. pentru indicarea punctului de echilibru īn reactie;
   4. ca masura de siguranta;
   
   
2. 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 + CH₃COO⁺ -> CH₃COONa + HO⁺
   
   
3. Putem spune urmatoarele:
   1. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   2. apa este un solvent polar bun;
   3. purificarea apei poate include procese biologice;
   4. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   5. apa este buna pentru consum, nu este nimic de a fi analizat;
   
   
4. Īn laborator au fost analizate:
   1. concentratia apei;
   2. punctul de fierbere al apei;
   3. aciditatea apei;
   4. moliciunea apei;
   5. duritatea apei;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   3. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   4. HCl + HO^- -> H₂O + Cl^-
   5. HCl + HO⁺ -> H₂O + Cl⁺
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   2. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   3. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
2. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Cl⁺ -> NaCl + HO⁺
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   
   
3. EDTA is used:
   1. for indication of the equilibrium point in the reaction;
   2. for complexing of Na¹⁺ and K¹⁺ ions;
   3. for recharging of the resin for water softening;
   4. as reagent for determining the hardness of the water;
   
   
4. In the laboratory were analyzed:
   1. the boiling point of the water;
   2. the color of the water;
   3. the mass of the water;
   4. the temperature of the water;
   
   
5. In the laboratory the water were:
   1. acidified for drinking purposes;
   2. hardened using the resin column;
   3. alkalinized for drinking purposes;
   4. biologically purified using the resin column;
   
   

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 + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   2. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   3. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + Cl⁺ -> NaCl + HO⁺
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   
   
3. EDTA este utilizat:
   1. pentru indicarea punctului de echilibru īn reactie;
   2. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   3. pentru reīncarcarea rasinii la dedurizarea apei;
   4. ca reactiv pentru determinarea duritatii apei;
   5. ca masura de siguranta;
   
   
4. Īn laborator au fost analizate:
   1. punctul de fierbere al apei;
   2. culoarea apei;
   3. masa apei;
   4. temperatura apei;
   5. concentratia apei;
   
   
5. In laborator apa au fost:
   1. acidulata pentru baut;
   2. calita folosind coloana de rasina;
   3. alcalinizeaza pentru baut;
   4. purificata biologic utilizānd coloana de rasina;
   5. complexata prin metoda titrimetrica EDTA;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. HCl + HO^- -> H₂O + Cl^-
   3. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   
   
2. We may say the followings:
   1. when water contains dissolved minerals and gases is bad for drinking;
   2. purification of the water may include labeling processes;
   3. purification of the water may include physical processes;
   4. water is pure only when is taken from a good freshwater mountain stream;
   
   
3. In the laboratory were analyzed:
   1. the concentration of the water;
   2. the color of the water;
   3. the mass of the water;
   4. the boiling point of the water;
   
   
4. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CH₃COO^- -> CH₃COONa + HO^-
   2. NaOH + HCOO^- -> HCOONa + HO^-
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   
   
5. In the laboratory the water were:
   1. alkalinized for drinking purposes;
   2. hardened using the resin column;
   3. acidified for drinking purposes;
   4. complexed by using EDTA titrimetric method;
   
   

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 + HO⁺ -> H₂O + Cl⁺
   2. HCl + HO^- -> H₂O+Cl^-
   3. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   5. HCl + CO₃^2- -> HCO₃^- + Cl^-
   
   
2. Putem spune urmatoarele:
   1. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   2. purificarea apei poate include procesele de etichetare;
   3. purificarea apei poate include procedee fizice;
   4. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   5. apa naturala poate contine materie organica si organisme vii;
   
   
3. Īn laborator au fost analizate:
   1. concentratia apei;
   2. culoarea apei;
   3. masa apei;
   4. punctul de fierbere al apei;
   5. solubilitatea apei;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   2. NaOH + HCOO^- -> HCOONa + HO^-
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   5. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   
   
5. In laborator apa au fost:
   1. alcalinizeaza pentru baut;
   2. calita folosind coloana de rasina;
   3. acidulata pentru baut;
   4. complexata prin metoda titrimetrica EDTA;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. In the laboratory the water were:
   1. acidified for drinking purposes;
   2. biologically purified using the resin column;
   3. hardened using the resin column;
   4. alkalinized for drinking purposes;
   
   
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 + HO⁺ -> H₂O + Cl⁺
   
   
3. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + HO^- -> H₂O + Cl^-
   2. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
4. In the laboratory were analyzed:
   1. the color of the water;
   2. the concentration of the water;
   3. the acidity of the water;
   4. the alkalinity of the water;
   
   
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 + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. In laborator apa au fost:
   1. acidulata pentru baut;
   2. purificata biologic utilizānd coloana de rasina;
   3. calita folosind coloana de rasina;
   4. alcalinizeaza pentru baut;
   5. dedurizata folosind coloana de rasina;
   
   
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 + HO⁺ -> H₂O + Cl⁺
   5. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + HO^- -> H₂O + Cl^-
   2. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
4. Īn laborator au fost analizate:
   1. culoarea apei;
   2. concentratia apei;
   3. aciditatea apei;
   4. alcalinitatea apei;
   5. temperatura apei;
   
   
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 + CO₃²⁺ -> HCO₃⁺ + HO⁺
   5. NaOH + CO₃^2- -> HCO₃^- + HO^-
   
   

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

1. The zinc plate:
   1. the mass is measured before and after immersing it in H₂SO₄;
   2. the surface is measured before and after immersing it in H₂SO₄;
   3. the volume is measured before and after immersing it in H₂SO₄;
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
2. Corrosion of metals:
   1. is the destruction of metals under the action of external factors;
   2. can be reduced by passivation;
   3. is a beneficial process that shows the stability of metals;
   4. is the protection in time to chemical agents;
   
   
3. 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. the mass is measured before and after immersing it in NaOH;
   3. the volume is measured before and after immersing it in NaOH;
   4. was corroded in sodium hydroxide solution;
   
   
4. In studied corrosion processes:
   1. always the metal changes its oxidation state;
   2. the metal it changes its oxidation state becoming an anion;
   3. a gas is released at both corrosion of zinc and aluminum;
   4. a gas is released only the corrosion of zinc;
   
   
5. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. Ni(CO)₄ -> Ni + CO
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   

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

1. Pentru placa de zinc:
   1. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   2. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   3. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
2. Coroziunea metalelor:
   1. este distrugerea metalelor sub actiunea factorilor externi;
   2. poate fi redusa prin pasivare;
   3. este un proces benefic care arata stabilitatea metalelor;
   4. este protectia de durata impotriva agentilor chimici;
   5. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   
   
3. Pentru placa de aluminiu:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. masa este masurata īnainte si dupa imersia īn NaOH;
   3. volumul se masoara īnainte si dupa imersia īn NaOH;
   4. a fost corodata īn solutie de hidroxid de sodiu;
   
   
4. Īn procesele de coroziune studiate:
   1. īntotdeauna metalul isi schimba starea de oxidare;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   4. un gaz este eliberat numai la corodarea zincului;
   5. un gaz este eliberat numai la corodarea aluminiului;
   
   
5. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. Ni(CO)₄ -> Ni + CO
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   5. Fe₂O₃ + CO -> Fe + CO₂
   
   

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

1. The aluminum plate:
   1. the volume is measured before and after immersing it in NaOH;
   2. was involved in the gravimetric method of corrosion analysis
   3. was involved in the volumetric method of corrosion analysis
   4. was corroded in sodium hydroxide solution;
   
   
2. Corrosion of metals:
   1. takes place merely from exposure to moisture in air;
   2. can be reduced by electroplating;
   3. is the destruction of metals under the action of external factors;
   4. is a beneficial process that shows the stability of metals;
   
   
3. Which of the following reactions may be called as of corrosion:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. Ni(CO)₄ -> Ni + CO
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. Fe₂O₃ + CO -> Fe + CO₂
   
   
4. The zinc plate:
   1. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   2. the mass is measured before and after immersing it in H₂SO₄;
   3. was degreased in sulfuric acid solution;
   4. the volume is measured before and after immersing it in H₂SO₄;
   
   
5. In studied corrosion processes:
   1. always the metal changes its oxidation state;
   2. the metal it changes its oxidation state becoming an cation;
   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 anion;
   
   

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

1. Pentru placa de aluminiu:
   1. volumul se masoara īnainte si dupa imersia īn NaOH;
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. a fost corodata īn solutie de hidroxid de sodiu;
   5. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
2. Coroziunea metalelor:
   1. are loc pur si simplu prin expunerea la umiditate īn aer;
   2. poate fi redusa prin galvanizare;
   3. este distrugerea metalelor sub actiunea factorilor externi;
   4. este un proces benefic care arata stabilitatea metalelor;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. Ni(CO)₄ -> Ni + CO
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. Fe₂O₃ + CO -> Fe + CO₂
   
   
4. Pentru placa de zinc:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   3. a fost degresata īn solutie de acid sulfuric;
   4. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   5. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   
   
5. Īn procesele de coroziune studiate:
   1. īntotdeauna metalul isi schimba starea de oxidare;
   2. metalul isi schimba starea de oxidare pentru a deveni un cation;
   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 anion;
   5. un gaz este eliberat numai la corodarea zincului;
   
   

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

1. Corrosion of metals:
   1. can be reduced by electroplating;
   2. is a beneficial process that shows the stability of metals;
   3. is helping in the process of cleaning the metals surfaces;
   4. is the protection in time to chemical agents;
   
   
2. The aluminum plate:
   1. the mass is measured before and after immersing it in NaOH;
   2. was corroded in sodium hydroxide solution;
   3. the volume is measured before and after immersing it in NaOH;
   4. was involved in the gravimetric method of corrosion analysis
   
   
3. In studied corrosion processes:
   1. a gas is released at both corrosion of zinc and aluminum;
   2. the metal it changes its oxidation state becoming an anion;
   3. a gas is released only the corrosion of aluminum;
   4. always the metal changes its oxidation state;
   
   
4. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
5. The zinc plate:
   1. the surface is measured before and after immersing it in H₂SO₄;
   2. the mass is measured before and after immersing it in H₂SO₄;
   3. was corroded in sulfuric solution;
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   

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

1. Coroziunea metalelor:
   1. poate fi redusa prin galvanizare;
   2. este un proces benefic care arata stabilitatea metalelor;
   3. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   4. este protectia de durata impotriva agentilor chimici;
   5. are loc pur si simplu prin expunerea la umiditate īn aer;
   
   
2. Pentru placa de aluminiu:
   1. masa este masurata īnainte si dupa imersia īn NaOH;
   2. a fost corodata īn solutie de hidroxid de sodiu;
   3. volumul se masoara īnainte si dupa imersia īn NaOH;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
3. Īn procesele de coroziune studiate:
   1. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. un gaz este eliberat numai la corodarea aluminiului;
   4. īntotdeauna metalul isi schimba starea de oxidare;
   5. un gaz este eliberat numai la corodarea zincului;
   
   
4. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
5. Pentru placa de zinc:
   1. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   2. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   3. a fost corodata īn solutie sulfuric;
   4. 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. Which of the following reactions may be called as of corrosion:
   1. ZnO + CO -> Zn + CO₂
   2. H⁺ + Ni -> H₂ + Ni²⁺
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. Fe₂O₃ + CO -> Fe + CO₂
   
   
2. In studied corrosion processes:
   1. a gas is released only the corrosion of zinc;
   2. always the metal changes its oxidation state;
   3. the metal it changes its oxidation state becoming an cation;
   4. a gas is released at both corrosion of zinc and aluminum;
   
   
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. the volume is measured before and after immersing it in H₂SO₄;
   
   
4. 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 corroded in sodium hydroxide solution;
   3. the surface is measured before and after immersing it in NaOH;
   4. the mass is measured before and after immersing it in NaOH;
   
   
5. Corrosion of metals:
   1. is the protection in time to chemical agents;
   2. is helping in the process of cleaning the metals surfaces;
   3. may provide useful raw materials for analysis;
   4. can be reduced by electroplating;
   
   

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. ZnO + CO -> Zn + CO₂
   2. H⁺ + Ni -> H₂ + Ni²⁺
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. Fe₂O₃ + CO -> Fe + CO₂
   5. H⁺ + Zn -> H₂ + Zn²⁺
   
   
2. Īn procesele de coroziune studiate:
   1. un gaz este eliberat numai la corodarea zincului;
   2. īntotdeauna metalul isi schimba starea de oxidare;
   3. metalul isi schimba starea de oxidare pentru a deveni un cation;
   4. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   5. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   
   
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. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   5. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   
   
4. Pentru placa de aluminiu:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. a fost corodata īn solutie de hidroxid de sodiu;
   3. suprafata se masoara īnainte si dupa imersia īn NaOH;
   4. masa este masurata īnainte si dupa imersia īn NaOH;
   5. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
5. Coroziunea metalelor:
   1. este protectia de durata impotriva agentilor chimici;
   2. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   3. poate furniza materii prime utile pentru analiza;
   4. poate fi redusa prin galvanizare;
   
   

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

1. Corrosion of metals:
   1. can be reduced by passivation;
   2. may provide useful raw materials for analysis;
   3. takes place merely from exposure to moisture in air;
   4. can be reduced by electroplating;
   
   
2. The aluminum plate:
   1. was degreased 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 corroded in sodium hydroxide solution;
   
   
3. Which of the following reactions may be called as of corrosion:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. ZnO + CO -> Zn + CO₂
   4. H⁺ + Fe -> H₂ + Fe²⁺
   
   
4. The zinc plate:
   1. was degreased in sulfuric acid solution;
   2. the surface is measured before and after immersing it in H₂SO₄;
   3. the volume is measured before and after immersing it in H₂SO₄;
   4. was corroded in sulfuric solution;
   
   
5. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an cation;
   2. a gas is released only the corrosion of zinc;
   3. when a gas is released its volume depends on the amount of metal corroded;
   4. a gas is released at both corrosion of zinc and aluminum;
   
   

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

1. Coroziunea metalelor:
   1. poate fi redusa prin pasivare;
   2. poate furniza materii prime utile pentru analiza;
   3. are loc pur si simplu prin expunerea la umiditate īn aer;
   4. poate fi redusa prin galvanizare;
   
   
2. Pentru placa de aluminiu:
   1. a fost degresata 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 corodata īn solutie de hidroxid de sodiu;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. ZnO + CO -> Zn + CO₂
   4. H⁺ + Fe -> H₂ + Fe²⁺
   5. Fe₂O₃ + CO -> Fe + CO₂
   
   
4. Pentru placa de zinc:
   1. a fost degresata īn solutie de acid sulfuric;
   2. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   3. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   4. a fost corodata īn solutie sulfuric;
   
   
5. Īn procesele de coroziune studiate:
   1. metalul isi schimba starea de oxidare pentru a deveni un cation;
   2. un gaz este eliberat numai la corodarea zincului;
   3. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   4. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. The intensity of the current:
   1. is to be adjusted when the experiment starts;
   2. affect only the quantity of the nickel deposition;
   3. is to be calculated before to start the experiment;
   4. is to be calculated after conducting the experiment;
   
   
2. Electrical conductivity of nickel salts solutions:
   1. is improved by salts additions;
   2. is relatively high;
   3. is reduced by salts additions;
   4. depends on the intensity of the current used;
   
   
3. 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 cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   
   
4. Theoretical mass of nickel deposited is calculated using:
   1. solutions laws;
   2. the electrolysis law;
   3. perfect gas law;
   4. the conservation of the energy law;
   
   
5. It is expected to have a mass of nickel deposited:
   1. inversely proportional with the surface of the sample;
   2. much higher than the calculated theoretical one;
   3. higher than the calculated theoretical one;
   4. proportional with the intensity of the current used;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Intensitatea curentului:
   1. trebuie sa fie ajustata cand se incepe experimentul;
   2. afecteaza numai cantitatea de nichel depus;
   3. trebuie sa fie calculata īnainte de a īncepe experimentul;
   4. se calculeaza dupa efectuarea experimentului;
   5. afecteaza numai calitatea depunerii nichelului;
   
   
2. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este īmbunatatita prin adaosuri de saruri;
   2. este relativ mare;
   3. este redusa prin adaosuri de saruri;
   4. depinde de intensitatea curentului utilizat;
   5. depinde de potentialul sursei utilizate;
   
   
3. 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 catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   5. la anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   
   
4. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea solutilor;
   2. legea electrolizei;
   3. legea gazelor perfecte;
   4. legea conservarii energiei;
   5. legea actiunii maselor;
   
   
5. Este de asteptat ca masa de nichel depus sa fie:
   1. invers proportionala cu suprafata probei;
   2. mult mai mare decāt cea teoretica calculata;
   3. mai mare decāt cea teoretica calculata;
   4. proportionala cu intensitatea curentului utilizat;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. The intensity of the current:
   1. is to be adjusted when the experiment starts;
   2. affect only the quality of the nickel deposition;
   3. is to be calculated after conducting the experiment;
   4. affect only the quantity of the nickel deposition;
   
   
2. Theoretical mass of nickel deposited is calculated using:
   1. law of mass action;
   2. solutions laws;
   3. the conservation of the number of atoms for each element law;
   4. the electrolysis law;
   
   
3. Electrical conductivity of nickel salts solutions:
   1. is reduced by salts additions;
   2. is relatively small;
   3. is improved by salts additions;
   4. is relatively high;
   
   
4. 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, Ni⁰ - 2e^- -> Ni²⁺
   3. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   4. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   
   
5. It is expected to have a mass of nickel deposited:
   1. lower than the calculated theoretical one;
   2. proportional with the nickel plating time;
   3. proportional with the surface of the sample;
   4. higher than the calculated theoretical one;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. At the nickel plating following reactions took place:
   1. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   2. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   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
   
   
2. Theoretical mass of nickel deposited is calculated using:
   1. the electrolysis law;
   2. law of mass action;
   3. perfect gas law;
   4. the conservation of the energy law;
   
   
3. It is expected to have a mass of nickel deposited:
   1. higher than the calculated theoretical one;
   2. proportional with the nickel plating time;
   3. much higher than the calculated theoretical one;
   4. lower than the calculated theoretical one;
   
   
4. Electrical conductivity of nickel salts solutions:
   1. is improved by salts additions;
   2. is reduced by salts additions;
   3. is relatively small;
   4. is relatively high;
   
   
5. The intensity of the current:
   1. affect only the quality of the nickel deposition;
   2. does not affect the quality nor the quantity of the nickel deposition;
   3. affect only the quantity of the nickel deposition;
   4. it depends on the surface of the sample;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. La nichelare urmatoarele reactii au avut loc:
   1. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la anod: O^2- - 2e^- -> O₂⁰
   2. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   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
   
   
2. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea electrolizei;
   2. legea actiunii maselor;
   3. legea gazelor perfecte;
   4. legea conservarii energiei;
   
   
3. Este de asteptat ca masa de nichel depus sa fie:
   1. mai mare decāt cea teoretica calculata;
   2. proportionala cu timpul de nichelare;
   3. mult mai mare decāt cea teoretica calculata;
   4. mai mica decāt cea teoretica calculata;
   5. invers proportionala cu suprafata probei;
   
   
4. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este īmbunatatita prin adaosuri de saruri;
   2. este redusa prin adaosuri de saruri;
   3. este relativ mica;
   4. este relativ mare;
   5. depinde de potentialul sursei utilizate;
   
   
5. Intensitatea curentului:
   1. afecteaza numai calitatea depunerii nichelului;
   2. nu afecteaza calitatea nici cantitatea nichelului depus;
   3. afecteaza numai cantitatea de nichel depus;
   4. depinde de suprafata probei;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. It is expected to have a mass of nickel deposited:
   1. proportional with the surface of the sample;
   2. inversely proportional with the surface of the sample;
   3. inversely proportional with the nickel plating time;
   4. proportional with the intensity of the current used;
   
   
2. Theoretical mass of nickel deposited is calculated using:
   1. solutions laws;
   2. the conservation of the number of atoms for each element law;
   3. the conservation of the energy law;
   4. perfect gas law;
   
   
3. The intensity of the current:
   1. affect only the quantity of the nickel deposition;
   2. affect only the quality of the nickel deposition;
   3. should be adjusted by the technicians, we have nothing to do there;
   4. is to be calculated after conducting the experiment;
   
   
4. Electrical conductivity of nickel salts solutions:
   1. is reduced by salts additions;
   2. depends on the potential of the source used;
   3. is improved by salts additions;
   4. is relatively high;
   
   
5. At the nickel plating following reactions took place:
   1. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   2. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   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 anode: 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. proportionala cu suprafata probei;
   2. invers proportionala cu suprafata probei;
   3. invers proportional cu timpul de nichelare;
   4. proportionala cu intensitatea curentului utilizat;
   
   
2. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea solutilor;
   2. conservarea numarului de atomi pentru fiecare element;
   3. legea conservarii energiei;
   4. legea gazelor perfecte;
   
   
3. Intensitatea curentului:
   1. afecteaza numai cantitatea de nichel depus;
   2. afecteaza numai calitatea depunerii nichelului;
   3. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   4. se calculeaza dupa efectuarea experimentului;
   
   
4. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este redusa prin adaosuri de saruri;
   2. depinde de potentialul sursei utilizate;
   3. este īmbunatatita prin adaosuri de saruri;
   4. este relativ mare;
   5. este relativ mica;
   
   
5. La nichelare urmatoarele reactii au avut loc:
   1. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   2. la anod (+), īn contact cu piesa de nichel, Ni⁰ - 2e^- -> Ni²⁺
   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 anod: O^2- - 2e^- -> O₂⁰
   5. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la catod: O^2- - 2e^- -> O₂⁰