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

1. We may say the followings:
   1. diffusion process appears only in gaseous state;
   2. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   3. the molecules have speeds in all gaseous, liquid and solid states;
   4. the molecules have energy in all gaseous, liquid and solid states;
   
   
2. At the ends of the tube following equilibrium reactions occurs:
   1. HCl + H₂O \=\ Cl^- + H₃O⁺
   2. H₂O \=\ H⁺ + HO^-
   3. H⁺ + HO^- \=\ H₂O
   4. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   
   
3. The chronometer is used in the experiment for:
   1. indication of the moment when we should pay attention to the experiment;
   2. extracting the information necessary to calculate the diffusion coefficients;
   3. synchronization of the diffusion times;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
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. are considered to be at the same temperature, but may have different speeds;
   3. all are moving in an arbitrary direction;
   4. all have same energy;
   
   
5. The time to the formation of the ring in the experiment is dependent on:
   1. the length of the tube and not of the width of the tube;
   2. the width of the tube and not of the length of the tube;
   3. the mode energy or mode speed of each involved species;
   4. the virtual speeds and not the real speeds of each involved species;
   
   

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

1. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. proces de difuzie apare numai īn stare gazoasa;
   2. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   3. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   4. moleculele au energie īn toate starile gazoasa, lichida si solida;
   5. energia cinetica a unei molecule este afectata de temperatura si presiune;
   
   
2. La capetele tubului urmatoarele reactii de echilibru apar:
   1. HCl + H₂O \=\ Cl^- + H₃O⁺
   2. H₂O \=\ H⁺ + HO^-
   3. H⁺ + HO^- \=\ H₂O
   4. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   5. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
3. Cronometrul este utilizat īn experimentul pentru:
   1. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   2. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   3. sincronizarea timpilor de difuzie;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   5. masurarea timpului de difuzie;
   
   
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. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   3. toate se īndreapta īntr-o directie arbitrara;
   4. toate au aceeasi energie;
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si nu latimea tubului;
   2. latimea tubului si nu lungimea tubului;
   3. viteza la moda sau energia la moda a fiecarei specii implicate;
   4. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   5. 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. At the ends of the tube following equilibrium reactions occurs:
   1. H⁺ + HO^- \=\ H₂O
   2. NH₃ + HCl \=\ NH₄Cl
   3. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
2. The position of the ring in the experiment is dependent on:
   1. the propagation of the species as neutral molecules and not as ions;
   2. the mode energy or mode speed of each involved species;
   3. the propagation of the species as ions and not as neutral molecules;
   4. the width of the tube and not of the length of the tube;
   
   
3. The chronometer is used in the experiment for:
   1. measuring of the diffusion time;
   2. indication of the moment when we should pay attention to the experiment;
   3. extracting the information necessary to calculate the diffusion coefficients;
   4. synchronization of the diffusion times;
   
   
4. 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. presence of the ammonia;
   4. formation of ammonium chloride;
   
   
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 real speeds and not the virtual speeds of each involved species;
   3. the average energy or average speed of each involved species;
   4. the concentrations of the solutions used;
   
   

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

1. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H⁺ + HO^- \=\ H₂O
   2. NH₃ + HCl \=\ NH₄Cl
   3. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   5. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   2. viteza la moda sau energia la moda a fiecarei specii implicate;
   3. propagarea speciilor ca ionii si nu ca si molecule neutre;
   4. latimea tubului si nu lungimea tubului;
   5. concentratiile solutiilor utilizate;
   
   
3. Cronometrul este utilizat īn experimentul pentru:
   1. masurarea timpului de difuzie;
   2. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   3. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   4. sincronizarea timpilor de difuzie;
   5. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   
   
4. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   2. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   3. prezentei amoniacului;
   4. formarea clorurii de amoniu;
   5. prezentei clorului;
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si latimea tubului;
   2. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   3. energia medie sau viteza medie a fiecarei specii implicate;
   4. concentratiile solutiilor utilizate;
   5. latimea tubului si nu lungimea 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. NH₃ + HCl \=\ NH₄Cl
   3. HCl + H₂O \=\ Cl^- + H₃O⁺
   4. H⁺ + HO^- \=\ H₂O
   
   
2. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same speed;
   2. all are moving in the same direction;
   3. are considered to be at the same temperature, but may have different speeds;
   4. all are moving in an arbitrary direction;
   
   
3. The position of the ring in the experiment is dependent on:
   1. the length of the tube and the width of the tube;
   2. the speed of diffusion of each involved species;
   3. the real speeds and not the virtual speeds of each involved species;
   4. the propagation of the species as ions and not as neutral molecules;
   
   
4. 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. synchronization of the diffusion times;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
5. The time to the formation of the ring in the experiment is dependent on:
   1. the average energy or average speed of each involved species;
   2. the real speeds and not the virtual speeds of each involved species;
   3. the mode energy or mode speed of each involved species;
   4. the virtual speeds and not the real speeds of each involved species;
   
   

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. NH₃ + HCl \=\ NH₄Cl
   3. HCl + H₂O \=\ Cl^- + H₃O⁺
   4. H⁺ + HO^- \=\ H₂O
   5. H₂O \=\ H⁺ + HO^-
   
   
2. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate au aceeasi viteza;
   2. toate se deplaseaza īn aceeasi directie;
   3. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   4. toate se īndreapta īntr-o directie arbitrara;
   
   
3. Pozitia inelului īn experimentul este dependenta de:
   1. lungimea tubului si latimea tubului;
   2. viteza de difuzie a fiecarei specii implicate;
   3. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   4. propagarea speciilor ca ionii si nu ca si molecule neutre;
   5. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   
   
4. Cronometrul este utilizat īn experimentul pentru:
   1. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   2. masurarea timpului de difuzie;
   3. sincronizarea timpilor de difuzie;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. energia medie sau viteza medie a fiecarei specii implicate;
   2. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   3. viteza la moda sau energia la moda a fiecarei specii implicate;
   4. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   
   

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

1. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same speed;
   2. are considered to be at the same temperature, but may have different speeds;
   3. all are moving in the same direction;
   4. all have same energy;
   
   
2. At the ends of the tube following equilibrium reactions occurs:
   1. HCl + H₂O \=\ Cl^- + H₃O⁺
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   4. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
3. We may say the followings:
   1. the kinetic energy of a molecule is affected by temperature and pressure;
   2. the kinetic energy of a molecule is affected by temperature only;
   3. the molecules have energy in all gaseous, liquid and solid states;
   4. the molecules have speeds in all gaseous, liquid and solid states;
   
   
4. The fog observed during the experiment is due to:
   1. presence of the chlorine;
   2. unproper illumination in the laboratory or our breathing;
   3. formation of ammonium chloride;
   4. our experiment designed to trap the product of the reaction;
   
   
5. The time to the formation of the ring in the experiment is dependent on:
   1. the length of the tube and not of the width of the tube;
   2. the length of the tube and the width of the tube;
   3. the concentrations of the solutions used;
   4. the real speeds and not the virtual speeds of each involved species;
   
   

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

1. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate au aceeasi viteza;
   2. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   3. toate se deplaseaza īn aceeasi directie;
   4. toate au aceeasi energie;
   
   
2. La capetele tubului urmatoarele reactii de echilibru apar:
   1. HCl + H₂O \=\ Cl^- + H₃O⁺
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   4. NH₄⁺ + Cl^- \=\ NH₄Cl
   5. H⁺ + HO^- \=\ H₂O
   
   
3. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. energia cinetica a unei molecule este afectata de temperatura si presiune;
   2. energia cinetica a unei molecule este afectata de numai temperatura;
   3. moleculele au energie īn toate starile gazoasa, lichida si solida;
   4. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   5. proces de difuzie apare numai īn stare gazoasa si lichida;
   
   
4. Ceata observata īn timpul experimentului se datoreaza:
   1. prezentei clorului;
   2. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   3. formarea clorurii de amoniu;
   4. experimentului nostru proiectat pentru a captura produsul de reactie;
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si nu latimea tubului;
   2. lungimea tubului si latimea tubului;
   3. concentratiile solutiilor utilizate;
   4. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   
   

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

1. We may say the followings:
   1. the molecules have speeds only in gaseous state;
   2. diffusion process appears only in gaseous and liquid states;
   3. diffusion process appears only in gaseous state;
   4. the kinetic energy of a molecule is affected by temperature and pressure;
   
   
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 are moving in the same direction;
   3. all have same speed;
   4. are considered to be at the same temperature, but may have different speeds;
   
   
3. The chronometer is used in the experiment for:
   1. to keep us busy;
   2. extracting the information necessary to calculate the speeds ratio;
   3. synchronization of the diffusion times;
   4. measuring of the diffusion time;
   
   
4. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   2. H⁺ + HO^- \=\ H₂O
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
5. The position of the ring in the experiment is dependent on:
   1. the length of the tube and not of the width of the tube;
   2. the propagation of the species as neutral molecules and not as ions;
   3. the real speeds and not the virtual speeds of each involved species;
   4. the virtual speeds and not the real speeds of each involved species;
   
   

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

1. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au viteze numai īn stare gazoasa;
   2. proces de difuzie apare numai īn stare gazoasa si lichida;
   3. proces de difuzie apare numai īn stare gazoasa;
   4. energia cinetica a unei molecule este afectata de temperatura si presiune;
   
   
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 se deplaseaza īn aceeasi directie;
   3. toate au aceeasi viteza;
   4. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   
   
3. Cronometrul este utilizat īn experimentul pentru:
   1. sa ne tina ocupati;
   2. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   3. sincronizarea timpilor de difuzie;
   4. masurarea timpului de difuzie;
   5. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   
   
4. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   2. H⁺ + HO^- \=\ H₂O
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   5. NH₃ + HCl \=\ NH₄Cl
   
   
5. Pozitia inelului īn experimentul este dependenta de:
   1. lungimea tubului si nu latimea tubului;
   2. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   3. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   4. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   
   

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

1. For gaseous state:
   1. the pressure is exactly the same as in liquid state;
   2. we need to take supplementary precautions in the laboratory;
   3. the pressure depends on the model which are used to approximate it;
   4. it exists an equation for all, p · V = n · R · T;
   
   
2. In the laboratory were studied:
   1. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   2. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   3. increasing of the pressure of a gas when was heated;
   4. increasing of the temperature of a solid mass when was heated;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. Ag + O₂ -> Ag₂O;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   4. KNO₃ -> KNO₂ + O₂;
   
   
4. The values taken from the experiment conducted in the laboratory indicated that:
   1. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   2. ozone were released as result of the decomposition;
   3. air were released as result of the decomposition;
   4. we do not possess enough information to decide what gas was released from the reaction;
   
   
5. A state equation for a real gas is:
   1. a relation between an certain number of state parameters;
   2. a relation which takes into account certain deviations from the ideal model;
   3. usable in the laboratory, but is not to be used somewhere else;
   4. a relation derived to approximate the relation between state parameters;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pentru stare gazoasa:
   1. presiunea este exact la fel ca si īn stare lichida;
   2. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   3. presiunea depinde de modelul care este utilizat pentru o aproxima;
   4. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   5. presiunea este mult mai mica decāt īn stare lichida;
   
   
2. Īn laborator s-au studiat:
   1. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   2. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   3. cresterea presiunii unui gaz cānd s-a īncalzit;
   4. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   5. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. Ag + O₂ -> Ag₂O;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   4. KNO₃ -> KNO₂ + O₂;
   
   
4. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   2. ozonul au fost eliberat ca urmare a descompunerii;
   3. aer a fost eliberat ca urmare a descompunerii;
   4. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un anumit numar de parametri de stare;
   2. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   3. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   4. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   
   

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

1. A state equation for a real gas is:
   1. a relation 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 obtained after conducting of the experiment;
   4. a relation between an certain number of state parameters;
   
   
2. For gaseous state:
   1. we need to take supplementary precautions in the laboratory;
   2. the pressure is subject to change when a chemical reaction occurs;
   3. the pressure is much higher than in liquid state;
   4. the pressure is exactly the same as in liquid state;
   
   
3. In the laboratory were studied:
   1. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   2. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   3. increasing of the temperature of a solid mass when was heated;
   4. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   
   
4. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. KClO₃ -> KCl + O₂;
   4. KCl + O₂ -> KClO₃;
   
   
5. The values taken from the experiment conducted in the laboratory indicated that:
   1. air were released as result of the decomposition;
   2. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   3. we do not possess enough information to decide what gas was released from the reaction;
   4. ozone were released as result of the decomposition;
   
   

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 obtinut dupa efectuarea experimentului;
   4. o relatie īntre un anumit numar de parametri de stare;
   
   
2. Pentru stare gazoasa:
   1. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   2. presiunea se pot modifica atunci cānd apare o reactie chimica;
   3. presiunea este mult mai mare decāt īn stare lichida;
   4. presiunea este exact la fel ca si īn stare lichida;
   
   
3. Īn laborator s-au studiat:
   1. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   2. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   5. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. KClO₃ -> KCl + O₂;
   4. KCl + O₂ -> KClO₃;
   5. distilarea aerului lichid;
   
   
5. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. aer a fost eliberat ca urmare a descompunerii;
   2. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   4. ozonul au fost eliberat ca urmare a descompunerii;
   
   

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

1. For gaseous state:
   1. it exists an equation for all, p · V = n · R · T;
   2. the pressure is unchanged when a chemical reaction occurs;
   3. the pressure is approximately the same as in liquid state;
   4. the pressure is subject to change when a chemical reaction occurs;
   
   
2. A state equation for a real gas is:
   1. a relation derived to approximate the relation between state parameters;
   2. a relation which is always true, independent of the values of the state parameters;
   3. a relation between an unlimited number of state parameters;
   4. a relation between an certain number of state parameters;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. the ideal model of a gas approximated the best the behavior of the released gas;
   2. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   3. we possess enough information to decide what gas was released from the reaction;
   4. air were released as result of the decomposition;
   
   
4. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   2. KCl + O₂ -> KClO₃;
   3. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   4. distillation of the liquid air;
   
   
5. In the laboratory were studied:
   1. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   2. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   3. the lost of the mass of a solid as result of producing of some gas;
   4. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pentru stare gazoasa:
   1. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   2. presiunea este neschimbata cānd apare o reactie chimica;
   3. presiunea este aproximativ aceeasi ca si īn stare lichida;
   4. presiunea se pot modifica atunci cānd apare o reactie chimica;
   5. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   
   
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 care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   3. o relatie īntre un numar nelimitat de parametri de stare;
   4. o relatie īntre un anumit numar de parametri de stare;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   2. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   4. aer a fost eliberat ca urmare a descompunerii;
   5. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   2. KCl + O₂ -> KClO₃;
   3. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   4. distilarea aerului lichid;
   
   
5. Īn laborator s-au studiat:
   1. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   2. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   3. pierdut din masa de solid ca urmare a producerii unor gaze;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   
   

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 obtained after conducting of the experiment;
   2. a relation between an unlimited number of state parameters;
   3. a relation which takes into account certain deviations from the ideal model;
   4. a relation derived to approximate the relation between state parameters;
   
   
2. 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. air were released as result of the decomposition;
   3. we do not possess enough information to decide what gas was released from the reaction;
   4. the ideal model of a gas approximated the best the behavior of the released gas;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O + O₂ -> H₂O₂;
   2. KClO₃ -> KCl + O₂;
   3. opening a bubble water bottle;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
4. In the laboratory were studied:
   1. the lost of the mass of a solid as result of producing of some gas;
   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. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   
   
5. For gaseous state:
   1. the pressure is much lower than in liquid state;
   2. we need to take supplementary precautions in the laboratory;
   3. it exists an equation for all, p · V = n · R · T;
   4. the pressure is unchanged when a chemical reaction occurs;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. O ecuatie de stare pentru un gaz real este:
   1. o relatie obtinut dupa efectuarea experimentului;
   2. o relatie īntre un numar nelimitat de parametri de stare;
   3. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   4. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   
   
2. 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. aer a fost eliberat ca urmare a descompunerii;
   3. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   4. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   5. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O + O₂ -> H₂O₂;
   2. KClO₃ -> KCl + O₂;
   3. deschiderea unei sticle de apa cu bule;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   5. distilarea aerului lichid;
   
   
4. Īn laborator s-au studiat:
   1. pierdut din masa de solid ca urmare a producerii unor gaze;
   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. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   
   
5. Pentru stare gazoasa:
   1. presiunea este mult mai mica decāt īn stare lichida;
   2. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   3. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   4. presiunea este neschimbata cānd apare o reactie chimica;
   5. presiunea este exact la fel ca si īn stare lichida;
   
   

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 obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   3. increasing of the pressure of a gas when was heated;
   4. increasing of the temperature of a solid mass when was heated;
   
   
2. A state equation for a real gas is:
   1. a relation between an certain number of state parameters;
   2. a relation which takes into account certain deviations from the ideal model;
   3. a relation obtained after conducting of the experiment;
   4. a relation which is always true, independent of the values of the state parameters;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. H₂O₂ -> H₂O + O₂;
   4. Ag₂O -> Ag + O₂;
   
   
4. The values taken from the experiment conducted in the laboratory indicated that:
   1. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   2. the ideal model of a gas approximated the worst the behavior of the released gas;
   3. we possess enough information to decide what gas was released from the reaction;
   4. we do not possess enough information to decide what gas was released from the reaction;
   
   
5. For gaseous state:
   1. we need to take supplementary precautions in the laboratory;
   2. the pressure is much higher than in liquid state;
   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;
   
   

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. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   3. cresterea presiunii unui gaz cānd s-a īncalzit;
   4. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   
   
2. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un anumit numar de parametri de stare;
   2. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   3. o relatie obtinut dupa efectuarea experimentului;
   4. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. H₂O₂ -> H₂O + O₂;
   4. Ag₂O -> Ag + O₂;
   
   
4. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   2. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   3. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   4. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
5. Pentru stare gazoasa:
   1. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   2. presiunea este mult mai mare decāt īn stare lichida;
   3. presiunea depinde de modelul care este utilizat pentru o aproxima;
   4. presiunea se pot modifica atunci cānd apare o reactie chimica;
   5. presiunea este exact la fel ca si īn stare lichida;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When aluminum is identified:
   1. the presence of other ions may produce a true positive outcome;
   2. the presence of other ions may produce a true negative outcome;
   3. using of alizarin along with ammonium hidroxide provide a red colored complex;
   4. is identified as Al²⁺ cation;
   
   
2. When lead is identified:
   1. a yellow complex appears;
   2. a heat release is observed;
   3. dangerous substances are used;
   4. a violet complex appears;
   
   
3. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   2. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   4. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   
   
4. Why moisten the paper with solution of sodium nitrate?
   1. to provide cations for analysis;
   2. for stopping after a while the chemical reaction that takes place;
   3. to be cut easily with scissors;
   4. to have something to do in the laboratory;
   
   
5. The paper requires before analysis of the sample:
   1. to be burned;
   2. to be moistened with an electrolyte;
   3. to be dry;
   4. to be cut in small pieces;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   2. prezenta altor ioni poate produce un rezultat adevarat negativ;
   3. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   4. este identificat ca cationul Al²⁺;
   
   
2. Cānd plumbul este identificat:
   1. apare un complex galben;
   2. se observa o eliberare de caldura;
   3. sunt utilizate substante periculoase;
   4. apare un complex violet;
   5. apare un complex albastru;
   
   
3. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   2. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   4. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   5. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
4. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru furniza cationi pentru analiza;
   2. pentru oprirea dupa un timp reactiei chimice care are loc;
   3. sa fie taiat cu usurinta cu foarfeca;
   4. pentru a avea ceva de a face īn laborator;
   5. pentru ca hartia sa actioneze ca izolator;
   
   
5. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa fie umezita cu un electrolit;
   3. sa fie uscata;
   4. sa fie taiata īn bucati mici;
   5. sa i se masoare suprafata;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. useful for alloys, not so useful for metals;
   2. useful for both metals and alloys;
   3. a nondestructive method of analysis;
   4. a gravimetric method of analysis;
   
   
2. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   
   
3. When lead is identified:
   1. interference of other ions may affect the outcome;
   2. dangerous substances are used;
   3. precautions should be made for toxic wastes disposal;
   4. a heat release is observed;
   
   
4. When aluminum is identified:
   1. only one identification reaction is possible;
   2. is identified as Al¹⁺ cation;
   3. is identified as Al³⁺ cation;
   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 dry;
   2. to be burned;
   3. to be weighted;
   4. to be cut in small pieces;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. utila pentru aliaje, nu atāt de utila pentru metale;
   2. utila atāt pentru metale si aliaje;
   3. o metoda nedistructiva de analiza;
   4. o metoda gravimetrica de analiza;
   5. o metoda cantitativa de analiza;
   
   
2. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   
   
3. Cānd plumbul este identificat:
   1. interferenta altor ioni poate afecta rezultatul;
   2. sunt utilizate substante periculoase;
   3. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   4. se observa o eliberare de caldura;
   
   
4. Cānd aluminiu este identificat:
   1. doar o reactie de identificare este posibila;
   2. este identificat ca cationul Al¹⁺;
   3. este identificat ca cationul Al³⁺;
   4. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   5. exista multe reactii posibile de identificare;
   
   
5. Hartia necesita ca īnainte de analiza probei:
   1. sa fie uscata;
   2. sa fie arsa;
   3. sa fie cantarita;
   4. sa fie taiata īn bucati mici;
   5. sa fie umezita cu un electrolit;
   
   

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 stopping after a while the chemical reaction that takes place;
   3. to provide cations for analysis;
   4. to have something to do in the laboratory;
   
   
2. 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. only one identification reaction is possible;
   4. using of alizarin along with ammonium hidroxide provide a red colored complex;
   
   
3. This method of analysis of metals and alloys is:
   1. useful for alloys, not so useful for metals;
   2. too ancient to be used today in the laboratory;
   3. useful for both metals and alloys;
   4. a destructive method of analysis;
   
   
4. The paper requires before analysis of the sample:
   1. to be acidified;
   2. to be tested;
   3. to be weighted;
   4. to be burned;
   
   
5. When the electrical circuit is closed:
   1. cations from the solution are passed into sample as metals;
   2. elements from the solution are passed into sample as metals;
   3. elements from the metals are passed into solution as anions;
   4. elements from the metals are passed into solution as cations;
   
   

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 oprirea dupa un timp reactiei chimice care are loc;
   3. pentru furniza cationi pentru analiza;
   4. pentru a avea ceva de a face īn laborator;
   
   
2. 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. doar o reactie de identificare este posibila;
   4. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   
   
3. Aceasta metoda de analiza de metale si aliaje este:
   1. utila pentru aliaje, nu atāt de utila pentru metale;
   2. prea veche pentru a fi utilizata īn prezent īn laborator;
   3. utila atāt pentru metale si aliaje;
   4. o metoda distructiva de analiza;
   5. o metoda nedistructiva de analiza;
   
   
4. Hartia necesita ca īnainte de analiza probei:
   1. sa fie acidulata;
   2. sa fie testata;
   3. sa fie cantarita;
   4. sa fie arsa;
   5. sa i se masoare suprafata;
   
   
5. Cānd circuitul electric este īnchis:
   1. cationii din solutie sunt trecuti īn proba ca metale;
   2. elemente din solutie sunt trecute īn proba ca metale;
   3. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   4. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. too ancient to be used today in the laboratory;
   2. useful for both metals and alloys;
   3. useful for pure metals, not so useful for alloys;
   4. a nondestructive method of analysis;
   
   
2. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   2. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
3. Why moisten the paper with solution of sodium nitrate?
   1. to provide cations for analysis;
   2. to have something to do in the laboratory;
   3. for the paper to work as isolator;
   4. for stopping after a while the chemical reaction that takes place;
   
   
4. The paper requires before analysis of the sample:
   1. to be moistened with an electrolyte;
   2. to measure its surface;
   3. to be burned;
   4. to be weighted;
   
   
5. When lead is identified:
   1. interference of other ions may affect the outcome;
   2. dangerous substances are used;
   3. a yellow complex appears;
   4. a red-brown complex appears;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. prea veche pentru a fi utilizata īn prezent īn laborator;
   2. utila atāt pentru metale si aliaje;
   3. utila pentru metale pure, nu atāt de utila pentru aliaje;
   4. o metoda nedistructiva de analiza;
   
   
2. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   2. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   5. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   
   
3. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru furniza cationi pentru analiza;
   2. pentru a avea ceva de a face īn laborator;
   3. pentru ca hartia sa actioneze ca izolator;
   4. pentru oprirea dupa un timp reactiei chimice care are loc;
   5. sa ne acomodam in a utiliza substante chimice;
   
   
4. Hartia necesita ca īnainte de analiza probei:
   1. sa fie umezita cu un electrolit;
   2. sa i se masoare suprafata;
   3. sa fie arsa;
   4. sa fie cantarita;
   5. sa fie taiata īn bucati mici;
   
   
5. Cānd plumbul este identificat:
   1. interferenta altor ioni poate afecta rezultatul;
   2. sunt utilizate substante periculoase;
   3. apare un complex galben;
   4. apare un complex rosu-brun;
   
   

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⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
2. This method of analysis of metals and alloys is:
   1. a quantitative method of analysis;
   2. a gravimetric method of analysis;
   3. useful for alloys, not so useful for metals;
   4. useful for both metals and alloys;
   
   
3. When the electrical circuit is closed:
   1. water dissociation is inhibited;
   2. elements from the metals are passed into solution as cations;
   3. cations from the solution are passed into sample as metals;
   4. elements from the solution are passed into sample as metals;
   
   
4. When lead is identified:
   1. a heat release is observed;
   2. precautions should be made for toxic wastes disposal;
   3. a yellow complex appears;
   4. dangerous substances are used;
   
   
5. When aluminum is identified:
   1. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   2. there are many identification reactions possible;
   3. the presence of other ions may produce a true positive outcome;
   4. the presence of other ions may produce a false negative outcome;
   
   

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⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   5. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
2. Aceasta metoda de analiza de metale si aliaje este:
   1. o metoda cantitativa de analiza;
   2. o metoda gravimetrica de analiza;
   3. utila pentru aliaje, nu atāt de utila pentru metale;
   4. utila atāt pentru metale si aliaje;
   5. prea veche pentru a fi utilizata īn prezent īn laborator;
   
   
3. Cānd circuitul electric este īnchis:
   1. disocierea apei este inhibata;
   2. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   3. cationii din solutie sunt trecuti īn proba ca metale;
   4. elemente din solutie sunt trecute īn proba ca metale;
   5. curent electric evita proba si hārtia;
   
   
4. Cānd plumbul este identificat:
   1. se observa o eliberare de caldura;
   2. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   3. apare un complex galben;
   4. sunt utilizate substante periculoase;
   5. apare un complex rosu-brun;
   
   
5. Cānd aluminiu este identificat:
   1. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   2. exista multe reactii posibile de identificare;
   3. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   4. prezenta altor ioni poate produce un rezultat fals negativ;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. Titration as a laboratory operation involves:
   1. a sulphuric acid solution;
   2. a pH indicator that changes color depending on the pH of the solution;
   3. a volume measurement;
   4. a salt solution;
   
   
2. Reactions between acids and bases:
   1. are always fast, taking place almost instantaneously;
   2. have as effect the change of the color of a solution;
   3. are all exothermic, being therefore dangerous outside of the laboratory;
   4. are rarely useful, and even rarely used;
   
   
3. In the calculations:
   1. are necessary to take the results imediatly after these are available from others;
   2. are necessary to discuss with our colleagues;
   3. are necessary to use some formulas expressing in different ways the concentration;
   4. are necessary to draw the tables in our notebooks after completing of the experiment;
   
   
4. The indicator should be added:
   1. only in special cases, when the burette is graded from its bottom to its top;
   2. only at the suggestion of the supervisor;
   3. to indicate our safety limits when we dealt with chemicals;
   4. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   
   
5. The equivalence point is:
   1. indicated when a color change is observed into the solution;
   2. the point in which a reactive is fully consumed in the reaction;
   3. the point in which a reactive should be added in the reaction flask;
   4. used to balance the equation;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Titrarea ca o operatiune de laborator implica:
   1. o solutie de acid sulfuric;
   2. un indicator de pH care īsi schimba culoarea īn functie de pH-ul solutiei;
   3. masurarea volumului;
   4. o solutie de sare;
   
   
2. Reactiile īntre acizi si baze:
   1. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   2. au ca efect schimbarea culorii unei solutii;
   3. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   4. sunt rareori utile, si chiar mai rar utilizate;
   5. au drept consecinta dizolvarea unei sari;
   
   
3. In calcule:
   1. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   2. este necesar sa discutam cu colegii;
   3. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   4. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   5. este necesara stabilirea coeficientilor reactiei chimice;
   
   
4. Trebuie adaugat indicatorul:
   1. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   2. numai la sugestia supraveghetorului;
   3. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   4. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   
   
5. Punctul de echivalenta este:
   1. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   2. punctul īn care un reactiv este consumat complet īn reactie;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   4. folosit pentru a echilibra ecuatia;
   
   

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. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
2. Titration as a laboratory operation involves:
   1. a standard or referential reactive;
   2. a sulphuric acid solution;
   3. a natrium hydroxide solution;
   4. an mixing of two ore more solutions;
   
   
3. The following chemical reactions were used in the experiments:
   1. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   2. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
4. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the number of atoms for each element;
   2. the principle of the conservation of the energy;
   3. the principle of the conservation of the volume;
   4. all glassware should be clean before, after and during the experiment;
   
   
5. In the calculations:
   1. are necessary to take some information from reagent bottles;
   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;
   
   

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. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   5. este īntotdeauna rapid si sigur;
   
   
2. Titrarea ca o operatiune de laborator implica:
   1. un standard sau reactiv de referinta;
   2. o solutie de acid sulfuric;
   3. o solutie de hidroxid de sodiu;
   4. amestecul a doua sau mai multe solutii;
   5. un indicator de pH care īsi schimba culoarea īn functie de pH-ul solutiei;
   
   
3. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   2. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
4. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii numarul de atomi pentru fiecare element;
   2. principiul conservarii energiei;
   3. principiul conservarii volumului;
   4. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   
   
5. In calcule:
   1. este necesar a se lua unele informatii de pe sticlele de reactivi;
   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;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. When a chemical reaction is balanced, following should be considered:
   1. all glassware should be clean before and after conducting the experiment;
   2. the principle of the conservation of the energy;
   3. the principle of the conservation of the volume;
   4. the liquid in the burette should be at the same level before and after conducting the experiment;
   
   
2. The following chemical reactions were used in the experiments:
   1. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. H₂O + CO₂ -> H₂CO₃
   4. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
3. Titration as a laboratory operation involves:
   1. a sulphuric acid solution;
   2. an mixing of two ore more solutions;
   3. a standard or referential reactive;
   4. a volume measurement;
   
   
4. The equivalence point is:
   1. the point in which a reactive should be added in the burette;
   2. used to balance the equation;
   3. something rarely encountered in chemistry;
   4. the point in which a reactive should be added in the reaction flask;
   
   
5. Reactions between acids and bases:
   1. have as a consequence the dissolution of a salt;
   2. are always fast, taking place almost instantaneously;
   3. have as effect the change of the color of a solution;
   4. always have as a consequence the formation of a quantity of water;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   2. principiul conservarii energiei;
   3. principiul conservarii volumului;
   4. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   5. principiul conservarii numarul de atomi pentru fiecare element;
   
   
2. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. H₂O + CO₂ -> H₂CO₃
   4. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   5. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   
3. Titrarea ca o operatiune de laborator implica:
   1. o solutie de acid sulfuric;
   2. amestecul a doua sau mai multe solutii;
   3. un standard sau reactiv de referinta;
   4. masurarea volumului;
   
   
4. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   2. folosit pentru a echilibra ecuatia;
   3. ceva rar īntālnit īn chimie;
   4. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   
   
5. Reactiile īntre acizi si baze:
   1. au drept consecinta dizolvarea unei sari;
   2. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   3. au ca efect schimbarea culorii unei solutii;
   4. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   5. sunt rareori utile, si chiar mai rar utilizate;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The density of the solutions depends on:
   1. temperature;
   2. concentration;
   3. time elapsed since were prepared;
   4. pressure;
   
   
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. the point in which a reactive is fully consumed in the reaction;
   4. used to balance the equation;
   
   
3. Reactions between acids and bases:
   1. have as effect the change of the color of a solution;
   2. have as a consequence the dissolution of a salt;
   3. are rarely useful, and even rarely used;
   4. are all exothermic, being therefore dangerous outside of the laboratory;
   
   
4. A redox process:
   1. involves changing of the oxidation states of some participants to the reaction;
   2. is always fast and safe;
   3. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. involves a transfer of electrons from one atom or group of atoms to another;
   
   
5. The following chemical reactions were used in the experiments:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Densitatea solutiilor depinde de:
   1. temperatura;
   2. concentratie;
   3. timpul scurs de cand au fost pregatite;
   4. presiune;
   5. cantitate;
   
   
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. punctul īn care un reactiv este consumat complet īn reactie;
   4. folosit pentru a echilibra ecuatia;
   
   
3. Reactiile īntre acizi si baze:
   1. au ca efect schimbarea culorii unei solutii;
   2. au drept consecinta dizolvarea unei sari;
   3. sunt rareori utile, si chiar mai rar utilizate;
   4. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   5. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   
   
4. Un proces redox:
   1. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   2. este īntotdeauna rapid si sigur;
   3. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   5. apare numai atunci cānd se amesteca substante gresit īn laborator;
   
   
5. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   5. H₂O + CO₂ -> H₂CO₃
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The density of the solutions depends on:
   1. time elapsed since were prepared;
   2. quantity;
   3. pressure;
   4. concentration;
   
   
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. used to balance the equation;
   4. the point in which a reactive is fully consumed in the reaction;
   
   
3. In the calculations:
   1. are necessary to establish the coefficients of the chemical reaction;
   2. are necessary to use our phones;
   3. are necessary to draw the tables in our notebooks after completing of the experiment;
   4. are necessary to take some information from reagent bottles;
   
   
4. When a chemical reaction is balanced, following should be considered:
   1. all glassware should be clean before, after and during the experiment;
   2. the principle of the conservation of the number of atoms for each element;
   3. all glassware should be clean before and after conducting the experiment;
   4. the liquid in the burette should be at the same level before and after conducting the experiment;
   
   
5. Titration as a laboratory operation involves:
   1. a natrium hydroxide solution;
   2. a mass measurement;
   3. a burette;
   4. an mixing of two ore more solutions;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Densitatea solutiilor depinde de:
   1. timpul scurs de cand au fost pregatite;
   2. cantitate;
   3. presiune;
   4. concentratie;
   
   
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. folosit pentru a echilibra ecuatia;
   4. punctul īn care un reactiv este consumat complet īn reactie;
   
   
3. In calcule:
   1. este necesara stabilirea coeficientilor reactiei chimice;
   2. este necesar sa utilizam telefoanele;
   3. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   4. este necesar a se lua unele informatii de pe sticlele de reactivi;
   5. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   
   
4. 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. principiul conservarii numarul de atomi pentru fiecare element;
   3. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   4. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   
   
5. Titrarea ca o operatiune de laborator implica:
   1. o solutie de hidroxid de sodiu;
   2. masurarea masei;
   3. o biureta;
   4. amestecul a doua sau mai multe solutii;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   2. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   3. NaOH + NO₃^- -> NaNO₃ + HO^-
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
2. EDTA is used:
   1. for complexing of Na¹⁺ and K¹⁺ ions;
   2. for safety precautions purposes;
   3. for indication of the equilibrium point in the reaction;
   4. for complexing of Ca²⁺ and Mg²⁺ ions;
   
   
3. In the laboratory were analyzed:
   1. the color of the water;
   2. the concentration of the water;
   3. the hardness of the water;
   4. the alkalinity of the water;
   
   
4. We may say the followings:
   1. purification of the water may include labeling processes;
   2. water is good for drinking, it is nothing to be analysed;
   3. water is pure only when is taken from a good freshwater mountain stream;
   4. purification of the water may include physical processes;
   
   
5. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   2. NaOH + HCOO^- -> HCOONa + HO^-
   3. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   4. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   2. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   3. NaOH + NO₃^- -> NaNO₃ + HO^-
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
2. EDTA este utilizat:
   1. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   2. ca masura de siguranta;
   3. pentru indicarea punctului de echilibru īn reactie;
   4. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   
   
3. Īn laborator au fost analizate:
   1. culoarea apei;
   2. concentratia apei;
   3. duritatea apei;
   4. alcalinitatea apei;
   
   
4. Putem spune urmatoarele:
   1. purificarea apei poate include procesele de etichetare;
   2. apa este buna pentru consum, nu este nimic de a fi analizat;
   3. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   4. purificarea apei poate include procedee fizice;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   2. NaOH + HCOO^- -> HCOONa + HO^-
   3. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   4. NaOH + CO₃^2- -> HCO₃^- + HO^-
   
   

FINAL TEST AT LABORATORY
Water analysis

1. In the laboratory were analyzed:
   1. the mass of the water;
   2. the temperature of the water;
   3. the solubility of the water;
   4. the softness of the water;
   
   
2. For a water sample following measures may be quantitatively expressed:
   1. permanent alkalinity;
   2. total acidity;
   3. mineral acidity;
   4. total alkalinity;
   
   
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. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   4. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   
   
4. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   2. NaOH + HCOO^- -> HCOONa + HO^-
   3. NaOH + HCOO⁺ -> HCOONa + HO⁺
   4. NaOH + CH₃COO^- -> CH₃COONa + HO^-
   
   
5. In the laboratory the water were:
   1. softened using the resin column;
   2. alkalinized for drinking purposes;
   3. hardened using the resin column;
   4. biologically purified using the resin column;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Īn laborator au fost analizate:
   1. masa apei;
   2. temperatura apei;
   3. solubilitatea apei;
   4. moliciunea apei;
   5. concentratia apei;
   
   
2. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. alcalinitate permanenta;
   2. aciditate totala;
   3. aciditate minerala;
   4. alcalinitate totala;
   5. duritate;
   
   
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. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   4. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   2. NaOH + HCOO^- -> HCOONa + HO^-
   3. NaOH + HCOO⁺ -> HCOONa + HO⁺
   4. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   5. NaOH + CO₃^2- -> HCO₃^- + HO^-
   
   
5. In laborator apa au fost:
   1. dedurizata folosind coloana de rasina;
   2. alcalinizeaza pentru baut;
   3. calita folosind coloana de rasina;
   4. purificata biologic utilizānd coloana de rasina;
   5. complexata prin metoda titrimetrica EDTA;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. total acidity;
   2. permanent alkalinity;
   3. color;
   4. total alkalinity;
   
   
2. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + NO₃^- -> NaNO₃ + HO^-
   2. NaOH + Cl^- -> NaCl + HO^-
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   
   
3. In the laboratory were analyzed:
   1. the alkalinity of the water;
   2. the concentration of the water;
   3. the color of the water;
   4. the softness of the water;
   
   
4. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + HCOO^- -> HCOONa + HO^-
   2. NaOH + CH₃COO^- -> CH₃COONa + HO^-
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   
   
5. EDTA is used:
   1. for recharging of the resin for water softening;
   2. as reagent for determining the hardness of the water;
   3. for complexing of Ca²⁺ and Mg²⁺ ions;
   4. for indication of the equilibrium point in the reaction;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. aciditate totala;
   2. alcalinitate permanenta;
   3. culoare;
   4. alcalinitate totala;
   5. duritate;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + NO₃^- -> NaNO₃ + HO^-
   2. NaOH + Cl^- -> NaCl + HO^-
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   5. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   
   
3. Īn laborator au fost analizate:
   1. alcalinitatea apei;
   2. concentratia apei;
   3. culoarea apei;
   4. moliciunea apei;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + HCOO^- -> HCOONa + HO^-
   2. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + CO₃^2- -> HCO₃^- + HO^-
   
   
5. EDTA este utilizat:
   1. pentru reīncarcarea rasinii la dedurizarea apei;
   2. ca reactiv pentru determinarea duritatii apei;
   3. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   4. pentru indicarea punctului de echilibru īn reactie;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   2. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   3. NaOH + HCOO⁺ -> HCOONa + HO⁺
   4. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   
   
2. In the laboratory were analyzed:
   1. the solubility of the water;
   2. the hardness of the water;
   3. the concentration of the water;
   4. the mass of the water;
   
   
3. We may say the followings:
   1. natural water may contain organic matter and living organisms;
   2. purification of the water may include biological processes;
   3. water is a good polar solvent;
   4. when water contains dissolved minerals and gases is bad for drinking;
   
   
4. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. for safety precautions purposes;
   3. for recharging of the resin for water softening;
   4. for indication of the equilibrium point in the reaction;
   
   
5. For a water sample following measures may be quantitatively expressed:
   1. hardness;
   2. purity;
   3. mineral acidity;
   4. permanent alkalinity;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   2. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   3. NaOH + HCOO⁺ -> HCOONa + HO⁺
   4. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   
   
2. Īn laborator au fost analizate:
   1. solubilitatea apei;
   2. duritatea apei;
   3. concentratia apei;
   4. masa apei;
   5. temperatura apei;
   
   
3. Putem spune urmatoarele:
   1. apa naturala poate contine materie organica si organisme vii;
   2. purificarea apei poate include procese biologice;
   3. apa este un solvent polar bun;
   4. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   
   
4. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. ca masura de siguranta;
   3. pentru reīncarcarea rasinii la dedurizarea apei;
   4. pentru indicarea punctului de echilibru īn reactie;
   5. ca reactiv pentru determinarea duritatii apei;
   
   
5. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. duritate;
   2. puritate;
   3. aciditate minerala;
   4. alcalinitate permanenta;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + HO^- -> H₂O + Cl^-
   2. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   3. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   4. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   
   
2. EDTA is used:
   1. for safety precautions purposes;
   2. as reagent for determining the hardness of the water;
   3. for recharging of the resin for water softening;
   4. for complexing of Ca²⁺ and Mg²⁺ ions;
   
   
3. We may say the followings:
   1. purification of the water may include labeling processes;
   2. purification of the water may include biological processes;
   3. when water contains dissolved minerals and gases is bad for drinking;
   4. water is a good polar solvent;
   
   
4. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + CO₃^2- -> HCO₃^- + Cl^-
   3. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
5. For a water sample following measures may be quantitatively expressed:
   1. total alkalinity;
   2. permanent alkalinity;
   3. total acidity;
   4. purity;
   
   

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 + HO^- -> H₂O + Cl^-
   2. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   3. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   4. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   
   
2. EDTA este utilizat:
   1. ca masura de siguranta;
   2. ca reactiv pentru determinarea duritatii apei;
   3. pentru reīncarcarea rasinii la dedurizarea apei;
   4. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   
   
3. Putem spune urmatoarele:
   1. purificarea apei poate include procesele de etichetare;
   2. purificarea apei poate include procese biologice;
   3. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   4. apa este un solvent polar bun;
   5. purificarea apei poate include procese chimice;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + CO₃^2- -> HCO₃^- + Cl^-
   3. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
5. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. alcalinitate totala;
   2. alcalinitate permanenta;
   3. aciditate totala;
   4. puritate;
   
   

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

1. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an anion;
   2. a gas is released only the corrosion of zinc;
   3. a gas is released at both corrosion of zinc and aluminum;
   4. a gas is released only the corrosion of aluminum;
   
   
2. Corrosion of metals:
   1. can be reduced by passivation;
   2. takes place merely from exposure to moisture in air;
   3. is the protection in time to chemical agents;
   4. is the destruction of metals under the action of external factors;
   
   
3. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. Ni(CO)₄ -> Ni + CO
   3. Fe₂O₃ + CO -> Fe + CO₂
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   
4. The aluminum plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was corroded in sodium hydroxide solution;
   3. the surface is measured before and after immersing it in NaOH;
   4. was degreased in sodium hydroxide solution;
   
   
5. 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. was corroded in sulfuric solution;
   3. the volume is measured before and after immersing it in H₂SO₄;
   4. was degreased in sulfuric acid solution;
   
   

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

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

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

1. In studied corrosion processes:
   1. a gas is released at both corrosion of zinc and aluminum;
   2. when a gas is released its volume depends on the amount of metal corroded;
   3. the metal it changes its oxidation state becoming an anion;
   4. a gas is released only the corrosion of aluminum;
   
   
2. Corrosion of metals:
   1. takes place merely from exposure to moisture in air;
   2. can be reduced by passivation;
   3. may provide useful raw materials for analysis;
   4. is a beneficial process that shows the stability of metals;
   
   
3. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. Ni(CO)₄ -> Ni + CO
   3. Al₂O₃ + NaOH -> NaAlO₂
   4. H⁺ + Ni -> H₂ + Ni²⁺
   
   
4. The zinc plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was corroded in sulfuric solution;
   3. was degreased in sulfuric acid solution;
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
5. 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. was corroded in sodium hydroxide solution;
   4. was degreased in sodium hydroxide solution;
   
   

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

1. Īn procesele de coroziune studiate:
   1. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   2. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   3. metalul isi schimba starea de oxidare pentru a deveni un anion;
   4. un gaz este eliberat numai la corodarea aluminiului;
   5. metalul isi schimba starea de oxidare pentru a deveni un cation;
   
   
2. Coroziunea metalelor:
   1. are loc pur si simplu prin expunerea la umiditate īn aer;
   2. poate fi redusa prin pasivare;
   3. poate furniza materii prime utile pentru analiza;
   4. este un proces benefic care arata stabilitatea metalelor;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. Ni(CO)₄ -> Ni + CO
   3. Al₂O₃ + NaOH -> NaAlO₂
   4. H⁺ + Ni -> H₂ + Ni²⁺
   5. H⁺ + Zn -> H₂ + Zn²⁺
   
   
4. Pentru placa de zinc:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. a fost corodata īn solutie sulfuric;
   3. a fost degresata īn solutie de acid sulfuric;
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   5. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
5. 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. a fost corodata īn solutie de hidroxid de sodiu;
   4. a fost degresata īn solutie de hidroxid de sodiu;
   
   

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

1. The aluminum plate:
   1. was involved in the gravimetric method of corrosion analysis
   2. was degreased in sodium hydroxide solution;
   3. was involved in the volumetric method of corrosion analysis
   4. was corroded in sodium hydroxide solution;
   
   
2. In studied corrosion processes:
   1. always the metal changes its oxidation state;
   2. when a gas is released its volume depends on the amount of metal corroded;
   3. the metal it changes its oxidation state becoming an anion;
   4. a gas is released only the corrosion of aluminum;
   
   
3. The zinc plate:
   1. was degreased in sulfuric acid solution;
   2. was involved in the volumetric method of corrosion analysis
   3. was involved in the gravimetric method of corrosion analysis
   4. was corroded in sulfuric solution;
   
   
4. Corrosion of metals:
   1. can be reduced by passivation;
   2. is helping in the process of cleaning the metals surfaces;
   3. is the protection in time to chemical agents;
   4. can be reduced by electroplating;
   
   
5. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. ZnO + CO -> Zn + CO₂
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   

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

1. Pentru placa de aluminiu:
   1. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   2. a fost degresata īn solutie de hidroxid de sodiu;
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. a fost corodata īn solutie de hidroxid de sodiu;
   
   
2. Īn procesele de coroziune studiate:
   1. īntotdeauna metalul isi schimba starea de oxidare;
   2. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   3. metalul isi schimba starea de oxidare pentru a deveni un anion;
   4. un gaz este eliberat numai la corodarea aluminiului;
   5. metalul isi schimba starea de oxidare pentru a deveni un cation;
   
   
3. Pentru placa de zinc:
   1. a fost degresata īn solutie de acid sulfuric;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   4. a fost corodata īn solutie sulfuric;
   
   
4. Coroziunea metalelor:
   1. poate fi redusa prin pasivare;
   2. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   3. este protectia de durata impotriva agentilor chimici;
   4. poate fi redusa prin galvanizare;
   
   
5. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. ZnO + CO -> Zn + CO₂
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   5. Ni(CO)₄ -> Ni + CO
   
   

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

1. The aluminum plate:
   1. the mass is measured before and after immersing it in NaOH;
   2. the volume is measured before and after immersing it in NaOH;
   3. the surface is measured before and after immersing it in NaOH;
   4. was involved in the gravimetric method of corrosion analysis
   
   
2. Corrosion of metals:
   1. is the destruction of metals under the action of external factors;
   2. is helping in the process of cleaning the metals surfaces;
   3. can be reduced by electroplating;
   4. may provide useful raw materials for analysis;
   
   
3. The zinc plate:
   1. the volume is measured before and after immersing it in H₂SO₄;
   2. was involved in the volumetric method of corrosion analysis
   3. was corroded in sulfuric solution;
   4. the mass is measured before and after immersing it in H₂SO₄;
   
   
4. Which of the following reactions may be called as of corrosion:
   1. Fe₂O₃ + CO -> Fe + CO₂
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. ZnO + CO -> Zn + CO₂
   
   
5. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an cation;
   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;
   
   

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

1. Pentru placa de aluminiu:
   1. masa este masurata īnainte si dupa imersia īn NaOH;
   2. volumul se masoara īnainte si dupa imersia īn NaOH;
   3. suprafata se masoara īnainte si dupa imersia īn NaOH;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
2. Coroziunea metalelor:
   1. este distrugerea metalelor sub actiunea factorilor externi;
   2. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   3. poate fi redusa prin galvanizare;
   4. poate furniza materii prime utile pentru analiza;
   5. are loc pur si simplu prin expunerea la umiditate īn aer;
   
   
3. Pentru placa de zinc:
   1. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. a fost corodata īn solutie sulfuric;
   4. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   5. a fost degresata īn solutie de acid sulfuric;
   
   
4. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. Fe₂O₃ + CO -> Fe + CO₂
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. ZnO + CO -> Zn + CO₂
   
   
5. Īn procesele de coroziune studiate:
   1. metalul isi schimba starea de oxidare pentru a deveni un cation;
   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;
   
   

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

1. The zinc plate:
   1. the surface is measured before and after immersing it in H₂SO₄;
   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. the volume is measured before and after immersing it in H₂SO₄;
   
   
2. The aluminum plate:
   1. the surface is measured before and after immersing it in NaOH;
   2. the volume is measured before and after immersing it in NaOH;
   3. the mass is measured before and after immersing it in NaOH;
   4. was involved in the gravimetric method of corrosion analysis
   
   
3. Which of the following reactions may be called as of corrosion:
   1. Ni(CO)₄ -> Ni + CO
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
4. In studied corrosion processes:
   1. a gas is released only the corrosion of zinc;
   2. when a gas is released its volume depends on the amount of metal corroded;
   3. the metal it changes its oxidation state becoming an anion;
   4. always the metal changes its oxidation state;
   
   
5. Corrosion of metals:
   1. is the destruction of metals under the action of external factors;
   2. takes place merely from exposure to moisture in air;
   3. can be reduced by electroplating;
   4. may provide useful raw materials for analysis;
   
   

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

1. Pentru placa de zinc:
   1. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   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. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   5. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   
   
2. Pentru placa de aluminiu:
   1. suprafata se masoara īnainte si dupa imersia īn NaOH;
   2. volumul se masoara īnainte si dupa imersia īn NaOH;
   3. masa este masurata īnainte si dupa imersia īn NaOH;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   5. a fost degresata īn solutie de hidroxid de sodiu;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. Ni(CO)₄ -> Ni + CO
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. Al₂O₃ + NaOH -> NaAlO₂
   5. Fe₂O₃ + CO -> Fe + CO₂
   
   
4. Īn procesele de coroziune studiate:
   1. un gaz este eliberat numai la corodarea zincului;
   2. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   3. metalul isi schimba starea de oxidare pentru a deveni un anion;
   4. īntotdeauna metalul isi schimba starea de oxidare;
   5. metalul isi schimba starea de oxidare pentru a deveni un cation;
   
   
5. Coroziunea metalelor:
   1. este distrugerea metalelor sub actiunea factorilor externi;
   2. are loc pur si simplu prin expunerea la umiditate īn aer;
   3. poate fi redusa prin galvanizare;
   4. poate furniza materii prime utile pentru analiza;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. Theoretical mass of nickel deposited is calculated using:
   1. the conservation of the energy law;
   2. law of mass action;
   3. the conservation of the number of atoms for each element law;
   4. the electrolysis law;
   
   
2. The intensity of the current:
   1. is to be adjusted when the experiment starts;
   2. does not affect the quality nor 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;
   
   
3. At the nickel plating following reactions took place:
   1. at anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   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, Ni²⁺ + 2e^- -> Ni⁰
   4. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   
   
4. It is expected to have a mass of nickel deposited:
   1. proportional with the surface of the sample;
   2. much lower than the calculated theoretical one;
   3. inversely proportional with the nickel plating time;
   4. inversely proportional with the surface of the sample;
   
   
5. Electrical conductivity of nickel salts solutions:
   1. depends on the potential of the source used;
   2. depends on the intensity of the current used;
   3. is improved by salts additions;
   4. is relatively high;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. Theoretical mass of nickel deposited is calculated using:
   1. the conservation of the energy law;
   2. solutions laws;
   3. law of mass action;
   4. the conservation of the number of atoms for each element law;
   
   
2. Electrical conductivity of nickel salts solutions:
   1. is improved by salts additions;
   2. is relatively high;
   3. depends on the intensity of the current used;
   4. depends on the potential of the source used;
   
   
3. It is expected to have a mass of nickel deposited:
   1. higher than the calculated theoretical one;
   2. proportional with the surface of the sample;
   3. much lower than the calculated theoretical one;
   4. inversely proportional with the nickel plating time;
   
   
4. The intensity of the current:
   1. affect only the quantity of the nickel deposition;
   2. should be adjusted by the technicians, we have nothing to do there;
   3. does not affect the quality nor the quantity of the nickel deposition;
   4. is to be adjusted when the experiment starts;
   
   
5. 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 cathode: O^2- - 2e^- -> O₂⁰
   3. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   4. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. 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. much lower than the calculated theoretical one;
   4. inversely proportional with the surface of the sample;
   
   
2. Electrical conductivity of nickel salts solutions:
   1. is relatively small;
   2. depends on the intensity of the current used;
   3. is relatively high;
   4. depends on the potential of the source used;
   
   
3. 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 cathode: O^2- - 2e^- -> O₂⁰
   
   
4. Theoretical mass of nickel deposited is calculated using:
   1. solutions laws;
   2. perfect gas law;
   3. the conservation of the energy law;
   4. the conservation of the number of atoms for each element law;
   
   
5. The intensity of the current:
   1. it depends on the surface of the sample;
   2. is to be calculated before to start the experiment;
   3. affect only the quality of the nickel deposition;
   4. does not affect the quality nor the quantity of the nickel deposition;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Este de asteptat ca masa de nichel depus sa fie:
   1. mai mica decāt cea teoretica calculata;
   2. proportionala cu timpul de nichelare;
   3. mult mai mica decāt cea teoretica calculata;
   4. invers proportionala cu suprafata probei;
   
   
2. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este relativ mica;
   2. depinde de intensitatea curentului utilizat;
   3. este relativ mare;
   4. depinde de potentialul sursei utilizate;
   5. este īmbunatatita prin adaosuri de saruri;
   
   
3. 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 catod: O^2- - 2e^- -> O₂⁰
   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 gazelor perfecte;
   3. legea conservarii energiei;
   4. conservarea numarului de atomi pentru fiecare element;
   
   
5. Intensitatea curentului:
   1. depinde de suprafata probei;
   2. trebuie sa fie calculata īnainte de a īncepe experimentul;
   3. afecteaza numai calitatea depunerii nichelului;
   4. nu afecteaza calitatea nici cantitatea nichelului depus;
   5. trebuie sa fie ajustata cand se incepe experimentul;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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