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. H₂O \=\ H⁺ + HO^-
   2. NH₄⁺ + Cl^- \=\ NH₄Cl
   3. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
2. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. are considered to be at the same temperature, but may have different speeds;
   2. are considered to be at the same temperature, but may have different energies;
   3. all have same energy;
   4. all have same speed;
   
   
3. The chronometer is used in the experiment for:
   1. indication of the moment when we should pay attention to the experiment;
   2. synchronization of the diffusion times;
   3. measuring of the diffusion time;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
4. We may say the followings:
   1. the molecules have speeds in all gaseous, liquid and solid states;
   2. diffusion process appears only in gaseous state;
   3. the molecules have speeds only in gaseous and liquid states;
   4. the molecules have energy only in gaseous state;
   
   
5. The position of the ring in the experiment is dependent on:
   1. the real speeds and not the virtual speeds of each involved species;
   2. the length of the tube and the width of the tube;
   3. the propagation of the species as neutral molecules and not as ions;
   4. the average energy or average speed 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. H₂O \=\ H⁺ + HO^-
   2. NH₄⁺ + Cl^- \=\ NH₄Cl
   3. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
2. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   2. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   3. toate au aceeasi energie;
   4. toate au aceeasi viteza;
   5. toate se deplaseaza īn aceeasi directie;
   
   
3. Cronometrul este utilizat īn experimentul pentru:
   1. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   2. sincronizarea timpilor de difuzie;
   3. masurarea timpului de difuzie;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   
   
4. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   2. proces de difuzie apare numai īn stare gazoasa;
   3. moleculele au viteze numai īn stare gazoasa si lichida;
   4. moleculele au energie numai īn stare gazoasa;
   5. energia cinetica a unei molecule este afectata de temperatura si presiune;
   
   
5. Pozitia inelului īn experimentul este dependenta de:
   1. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   2. lungimea tubului si latimea tubului;
   3. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   4. energia medie sau viteza medie a 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. 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 concentrations of the solutions used;
   3. the propagation of the species as neutral molecules and not as ions;
   4. the real speeds and not the virtual speeds of each involved species;
   
   
2. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory or our breathing;
   2. formation of ammonium chloride;
   3. presence of the chlorine;
   4. unproper illumination in the laboratory and our breathing;
   
   
3. At the ends of the tube following equilibrium reactions occurs:
   1. H⁺ + HO^- \=\ H₂O
   2. H₂O \=\ H⁺ + HO^-
   3. HCl + H₂O \=\ Cl^- + H₃O⁺
   4. NH₃ + HCl \=\ NH₄Cl
   
   
4. We may say the followings:
   1. the molecules have energy only in gaseous state;
   2. the molecules have speeds in all gaseous, liquid and solid states;
   3. the molecules have energy only in gaseous and liquid states;
   4. the molecules have speeds only in gaseous state;
   
   
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 mode energy or mode speed of each involved species;
   3. the propagation of the species as neutral molecules and not as ions;
   4. the propagation of the species as ions and not as neutral molecules;
   
   

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

1. Pozitia inelului īn experimentul este dependenta de:
   1. lungimea tubului si latimea tubului;
   2. concentratiile solutiilor utilizate;
   3. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   4. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   5. viteza de difuzie a fiecarei specii implicate;
   
   
2. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   2. formarea clorurii de amoniu;
   3. prezentei clorului;
   4. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   5. prezentei amoniacului;
   
   
3. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H⁺ + HO^- \=\ H₂O
   2. H₂O \=\ H⁺ + HO^-
   3. HCl + H₂O \=\ Cl^- + H₃O⁺
   4. NH₃ + HCl \=\ NH₄Cl
   
   
4. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au energie numai īn stare gazoasa;
   2. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   3. moleculele au energie numai īn stare gazoasa si lichida;
   4. moleculele au viteze numai īn stare gazoasa;
   5. proces de difuzie apare numai īn stare gazoasa si lichida;
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si nu latimea tubului;
   2. viteza la moda sau energia la moda a fiecarei specii implicate;
   3. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   4. propagarea speciilor ca ionii si nu ca si molecule neutre;
   5. lungimea tubului si latimea tubului;
   
   

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

1. We may say the followings:
   1. diffusion process appears in all gaseous, liquid and solid states;
   2. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   3. the kinetic energy of a molecule is affected by temperature and pressure;
   4. diffusion process appears only in gaseous and liquid states;
   
   
2. At the ends of the tube following equilibrium reactions occurs:
   1. HCl + H₂O \=\ Cl^- + H₃O⁺
   2. NH₃ + HCl \=\ NH₄Cl
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   
   
3. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the speeds ratio;
   2. to keep us busy;
   3. synchronization of the diffusion times;
   4. measuring of the diffusion time;
   
   
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 speeds;
   2. all have same energy;
   3. all are moving in the same direction;
   4. all are moving in an arbitrary direction;
   
   
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 length of the tube and the width of the tube;
   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;
   
   

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 īn toate starile gazoasa, lichida si solida;
   2. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   3. energia cinetica a unei molecule este afectata de temperatura si presiune;
   4. proces de difuzie apare numai īn stare gazoasa si lichida;
   5. moleculele au energie numai īn stare gazoasa si lichida;
   
   
2. La capetele tubului urmatoarele reactii de echilibru apar:
   1. HCl + H₂O \=\ Cl^- + H₃O⁺
   2. NH₃ + HCl \=\ NH₄Cl
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   5. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   
   
3. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   2. sa ne tina ocupati;
   3. sincronizarea timpilor de difuzie;
   4. 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 viteze diferite;
   2. toate au aceeasi energie;
   3. toate se deplaseaza īn aceeasi directie;
   4. toate se īndreapta īntr-o directie arbitrara;
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. energia medie sau viteza medie a fiecarei specii implicate;
   2. lungimea tubului si latimea tubului;
   3. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   4. propagarea speciilor ca ionii si nu ca si molecule neutre;
   
   

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

1. The fog observed during the experiment is due to:
   1. formation of ammonium chloride;
   2. unproper illumination in the laboratory and our breathing;
   3. presence of the ammonia;
   4. unproper illumination in the laboratory or our breathing;
   
   
2. The time to the formation of the ring in the experiment is dependent on:
   1. the mode energy or mode speed of each involved species;
   2. the real speeds and not the virtual speeds 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. At the ends of the tube following equilibrium reactions occurs:
   1. H₂O \=\ H⁺ + HO^-
   2. NH₃ + HCl \=\ NH₄Cl
   3. H⁺ + HO^- \=\ H₂O
   4. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   
   
4. The chronometer is used in the experiment for:
   1. to keep us busy;
   2. extracting the information necessary to calculate the diffusion coefficients;
   3. measuring of the diffusion time;
   4. indication of the moment when we should pay attention to the experiment;
   
   
5. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same energy;
   2. are considered to be at the same temperature, but may have different energies;
   3. all are moving in an arbitrary direction;
   4. all are moving in the same direction;
   
   

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

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

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. 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 have same energy;
   4. all have same speed;
   
   
2. The fog observed during the experiment is due to:
   1. our experiment designed to trap the product of the reaction;
   2. unproper illumination in the laboratory and our breathing;
   3. unproper illumination in the laboratory or our breathing;
   4. formation of ammonium chloride;
   
   
3. The time to the formation of the ring in the experiment is dependent on:
   1. the length of the tube and not of the width of the tube;
   2. the virtual speeds and not the real speeds of each involved species;
   3. the width of the tube and not of the length of the tube;
   4. the average energy or average speed of each involved species;
   
   
4. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + HCl \=\ NH₄Cl
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. H⁺ + HO^- \=\ H₂O
   4. H₂O \=\ H⁺ + HO^-
   
   
5. The position of the ring in the experiment is dependent on:
   1. the speed of diffusion of each involved species;
   2. the mode energy or mode speed of each involved species;
   3. the real speeds and not the virtual speeds of each involved species;
   4. the propagation of the species as ions and not as neutral molecules;
   
   

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

1. 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 au aceeasi energie;
   4. toate au aceeasi viteza;
   5. toate se īndreapta īntr-o directie arbitrara;
   
   
2. Ceata observata īn timpul experimentului se datoreaza:
   1. experimentului nostru proiectat pentru a captura produsul de reactie;
   2. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   3. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   4. formarea clorurii de amoniu;
   5. prezentei clorului;
   
   
3. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si nu latimea tubului;
   2. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   3. latimea tubului si nu lungimea tubului;
   4. energia medie sau viteza medie a fiecarei specii implicate;
   
   
4. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + HCl \=\ NH₄Cl
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. H⁺ + HO^- \=\ H₂O
   4. H₂O \=\ H⁺ + HO^-
   
   
5. Pozitia inelului īn experimentul este dependenta de:
   1. viteza de difuzie a fiecarei specii implicate;
   2. viteza la moda sau energia la moda 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;
   
   

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

1. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   2. KNO₃ -> KNO₂ + O₂;
   3. KClO₃ -> KCl + O₂;
   4. Ag + O₂ -> Ag₂O;
   
   
2. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. increasing of the pressure of a gas when was heated;
   3. increasing of the temperature of a solid mass when was heated;
   4. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   
   
3. A state equation for a real gas is:
   1. a relation between an unlimited number of state parameters;
   2. a relation obtained after conducting of the experiment;
   3. a relation which takes into account certain deviations from the ideal model;
   4. a relation derived to approximate the relation between state parameters;
   
   
4. The values taken from the experiment conducted in the laboratory indicated that:
   1. 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. oxigen were released as result of the decomposition;
   
   
5. For gaseous state:
   1. the pressure is approximately the same as in liquid state;
   2. the pressure is exactly the same as in liquid state;
   3. we need to take supplementary precautions in the laboratory;
   4. the pressure is subject to change when a chemical reaction occurs;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   2. KNO₃ -> KNO₂ + O₂;
   3. KClO₃ -> KCl + O₂;
   4. Ag + O₂ -> Ag₂O;
   5. Ag₂O -> Ag + O₂;
   
   
2. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. cresterea presiunii unui gaz cānd s-a īncalzit;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   5. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   
   
3. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un numar nelimitat de parametri de stare;
   2. o relatie obtinut dupa efectuarea experimentului;
   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;
   5. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   
   
4. 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. oxigenul au fost eliberat ca urmare a descompunerii;
   5. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   
   
5. Pentru stare gazoasa:
   1. presiunea este aproximativ aceeasi ca si īn stare lichida;
   2. presiunea este exact la fel ca si īn stare lichida;
   3. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   4. presiunea se pot modifica atunci cānd apare o reactie chimica;
   5. presiunea este neschimbata cānd apare o reactie chimica;
   
   

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

1. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   2. the lost of the mass of a solid as result of producing of some gas;
   3. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   4. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   
   
2. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. Ag₂O -> Ag + O₂;
   4. distillation of the liquid air;
   
   
3. A state equation for a real gas is:
   1. a relation which may involve some constants dependent of gas composition;
   2. usable in the laboratory, but is not to be used somewhere else;
   3. a relation which is always true, independent of the values of the state parameters;
   4. a relation between an unlimited number of state parameters;
   
   
4. The values taken from the experiment conducted in the laboratory indicated that:
   1. air were released as result of the decomposition;
   2. oxigen were released as result of the decomposition;
   3. ozone were released as result of the decomposition;
   4. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   
   
5. For gaseous state:
   1. the pressure is exactly the same as in liquid state;
   2. the pressure is much lower than in liquid state;
   3. the pressure is subject to change when a chemical reaction occurs;
   4. we need to take supplementary precautions in the laboratory;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   2. pierdut din masa de solid ca urmare a producerii unor gaze;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   5. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   
   
2. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. Ag₂O -> Ag + O₂;
   4. distilarea aerului lichid;
   5. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   
   
3. O ecuatie de stare pentru un gaz real este:
   1. o relatie care poate implica unele constante dependente de compozitia gazului;
   2. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   3. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   4. o relatie īntre un numar nelimitat de parametri de stare;
   
   
4. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. aer a fost eliberat ca urmare a descompunerii;
   2. oxigenul au fost eliberat ca urmare a descompunerii;
   3. ozonul au fost eliberat ca urmare a descompunerii;
   4. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   5. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
5. Pentru stare gazoasa:
   1. presiunea este exact la fel ca si īn stare lichida;
   2. presiunea este mult mai mica decāt īn stare lichida;
   3. presiunea se pot modifica atunci cānd apare o reactie chimica;
   4. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   5. presiunea este neschimbata cānd apare o reactie chimica;
   
   

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

1. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   2. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   3. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   4. increasing of the pressure of a gas when was heated;
   
   
2. A state equation for a real gas is:
   1. a relation between an certain number of state parameters;
   2. usable in the laboratory, but is not to be used somewhere else;
   3. a relation between an unlimited number of state parameters;
   4. a relation which takes into account certain deviations from the ideal model;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. oxigen were released as result of the decomposition;
   2. the ideal model of a gas approximated the worst the behavior of the released gas;
   3. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   4. ozone 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. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. KNO₃ -> KNO₂ + O₂;
   3. KNO₂ + O₂ -> KNO₃;
   4. KClO₃ -> KCl + O₂;
   
   
5. For gaseous state:
   1. the pressure is unchanged when a chemical reaction occurs;
   2. the pressure is much lower than in liquid state;
   3. the pressure is exactly the same as in liquid state;
   4. we need to take supplementary precautions in the laboratory;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   2. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   4. cresterea presiunii unui gaz 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. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   3. o relatie īntre un numar nelimitat de parametri de stare;
   4. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. oxigenul au fost eliberat ca urmare a descompunerii;
   2. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   3. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. ozonul au fost eliberat ca urmare a descompunerii;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. KNO₃ -> KNO₂ + O₂;
   3. KNO₂ + O₂ -> KNO₃;
   4. KClO₃ -> KCl + O₂;
   
   
5. Pentru stare gazoasa:
   1. presiunea este neschimbata cānd apare o reactie chimica;
   2. presiunea este mult mai mica decāt īn stare lichida;
   3. presiunea este exact la fel ca si īn stare lichida;
   4. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   
   

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

1. The values taken from the experiment conducted in the laboratory indicated that:
   1. we possess enough information to decide what gas was released from the reaction;
   2. air were released as result of the decomposition;
   3. ozone were released as result of the decomposition;
   4. the ideal model of a gas approximated the worst the behavior of the released gas;
   
   
2. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. distillation of the liquid air;
   2. H₂O + O₂ -> H₂O₂;
   3. KNO₂ + O₂ -> KNO₃;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
3. 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 between an unlimited number of state parameters;
   3. a relation between an certain number of state parameters;
   4. a relation derived to approximate the relation between state parameters;
   
   
4. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   3. the producing of some gas as result of a lost of the mass of a solid;
   4. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   
   
5. For gaseous state:
   1. the pressure depends on the model which are used to approximate it;
   2. we need to take supplementary precautions in the laboratory;
   3. the pressure is exactly the same as in liquid state;
   4. the pressure is subject to change when a chemical reaction occurs;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   2. aer a fost eliberat ca urmare a descompunerii;
   3. ozonul au fost eliberat ca urmare a descompunerii;
   4. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   5. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
2. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. distilarea aerului lichid;
   2. H₂O + O₂ -> H₂O₂;
   3. KNO₂ + O₂ -> KNO₃;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
3. 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 īntre un numar nelimitat de parametri de stare;
   3. o relatie īntre un anumit numar de parametri de stare;
   4. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   5. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   
   
4. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   3. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   4. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   
   
5. Pentru stare gazoasa:
   1. presiunea depinde de modelul care este utilizat pentru o aproxima;
   2. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   3. presiunea este exact la fel ca si īn stare lichida;
   4. presiunea se pot modifica atunci cānd apare o reactie chimica;
   
   

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 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 which may involve some constants dependent of gas composition;
   4. a relation which takes into account certain deviations from the ideal model;
   
   
2. 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. we possess enough information to decide what gas was released from the reaction;
   3. air were released as result of the decomposition;
   4. the ideal model of a gas approximated the worst the behavior of the released gas;
   
   
3. In the laboratory were studied:
   1. increasing of the temperature of a solid mass when was heated;
   2. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   3. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   4. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   
   
4. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. Ag + O₂ -> Ag₂O;
   
   
5. For gaseous state:
   1. the pressure is exactly the same as in liquid state;
   2. the pressure is much higher than in liquid state;
   3. the pressure is approximately the same as in liquid state;
   4. the pressure depends on the model which are used to approximate it;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. 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 care poate implica unele constante dependente de compozitia gazului;
   4. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   2. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. aer a fost eliberat ca urmare a descompunerii;
   4. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   5. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
3. Īn laborator s-au studiat:
   1. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   2. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   3. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   5. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. Ag + O₂ -> Ag₂O;
   5. H₂O₂ -> H₂O + O₂;
   
   
5. Pentru stare gazoasa:
   1. presiunea este exact la fel ca si īn stare lichida;
   2. presiunea este mult mai mare decāt īn stare lichida;
   3. presiunea este aproximativ aceeasi ca si īn stare lichida;
   4. presiunea depinde de modelul care este utilizat pentru o aproxima;
   5. presiunea este neschimbata cānd apare o reactie chimica;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. Why moisten the paper with solution of sodium nitrate?
   1. for stopping after a while the chemical reaction that takes place;
   2. for the paper to work as isolator;
   3. to have something to do in the laboratory;
   4. to be cut easily with scissors;
   
   
2. The paper requires before analysis of the sample:
   1. to be tested;
   2. to be dry;
   3. to be acidified;
   4. to be moistened with an electrolyte;
   
   
3. When aluminum is identified:
   1. supplementary precautions should be taken, because the plates are made from aluminum too;
   2. the presence of other ions may produce a true negative outcome;
   3. is identified as Al²⁺ cation;
   4. using of alizarin along with ammonium hidroxide provide a red colored complex;
   
   
4. When lead is identified:
   1. a violet complex appears;
   2. the reactions used clearly indicates its presence;
   3. a blue complex appears;
   4. a heat release is observed;
   
   
5. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as cations;
   2. surface of the sample is fastly covered by a protecting shield of electrons;
   3. cations from the solution are passed into sample as metals;
   4. water dissociation is inhibited;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru oprirea dupa un timp reactiei chimice care are loc;
   2. pentru ca hartia sa actioneze ca izolator;
   3. pentru a avea ceva de a face īn laborator;
   4. sa fie taiat cu usurinta cu foarfeca;
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa fie testata;
   2. sa fie uscata;
   3. sa fie acidulata;
   4. sa fie umezita cu un electrolit;
   
   
3. Cānd aluminiu este identificat:
   1. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   2. prezenta altor ioni poate produce un rezultat adevarat negativ;
   3. este identificat ca cationul Al²⁺;
   4. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   5. prezenta altor ioni poate produce un rezultat fals negativ;
   
   
4. Cānd plumbul este identificat:
   1. apare un complex violet;
   2. reactiile utilizate īn mod clar ii indica prezenta;
   3. apare un complex albastru;
   4. se observa o eliberare de caldura;
   5. apare un complex rosu-brun;
   
   
5. Cānd circuitul electric este īnchis:
   1. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   2. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   3. cationii din solutie sunt trecuti īn proba ca metale;
   4. disocierea apei este inhibata;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   2. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   
   
2. When aluminum is identified:
   1. the presence of other ions may produce a false negative outcome;
   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. supplementary precautions should be taken, because the plates are made from aluminum too;
   
   
3. This method of analysis of metals and alloys is:
   1. not useful for both metals and alloys;
   2. useful for alloys, not so useful for metals;
   3. a gravimetric method of analysis;
   4. useful for pure metals, not so useful for alloys;
   
   
4. The paper requires before analysis of the sample:
   1. to be tested;
   2. to measure its surface;
   3. to be acidified;
   4. to be weighted;
   
   
5. Why moisten the paper with solution of sodium nitrate?
   1. for stopping after a while the chemical reaction that takes place;
   2. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   3. to accomodate ourselves to use chemicals;
   4. to have something to do in the laboratory;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   2. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   5. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   
   
2. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat fals negativ;
   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. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   5. prezenta altor ioni poate produce un rezultat fals pozitiv;
   
   
3. Aceasta metoda de analiza de metale si aliaje este:
   1. nu este utila nici pentru metale nici pentru aliaje;
   2. utila pentru aliaje, nu atāt de utila pentru metale;
   3. o metoda gravimetrica de analiza;
   4. utila pentru metale pure, nu atāt de utila pentru aliaje;
   5. o metoda distructiva de analiza;
   
   
4. Hartia necesita ca īnainte de analiza probei:
   1. sa fie testata;
   2. sa i se masoare suprafata;
   3. sa fie acidulata;
   4. sa fie cantarita;
   
   
5. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru oprirea dupa un timp reactiei chimice care are loc;
   2. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   3. sa ne acomodam in a utiliza substante chimice;
   4. pentru a avea ceva de a face īn laborator;
   5. sa fie taiat cu usurinta cu foarfeca;
   
   

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. not useful for both metals and alloys;
   3. a gravimetric method of analysis;
   4. useful for both metals and alloys;
   
   
2. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   
   
3. The paper requires before analysis of the sample:
   1. to be burned;
   2. to be dry;
   3. to be acidified;
   4. to measure its surface;
   
   
4. When the electrical circuit is closed:
   1. cations from the solution are passed into sample as metals;
   2. electric current avoids the sample and the paper;
   3. elements from the metals are passed into solution as anions;
   4. anions from the solution are passed into sample as metals;
   
   
5. When lead is identified:
   1. a violet complex appears;
   2. a blue complex appears;
   3. precautions should be made for toxic wastes disposal;
   4. the reactions used clearly indicates its presence;
   
   

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. nu este utila nici pentru metale nici pentru aliaje;
   3. o metoda gravimetrica de analiza;
   4. utila atāt pentru metale si aliaje;
   5. o metoda nedistructiva de analiza;
   
   
2. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   5. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
3. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa fie uscata;
   3. sa fie acidulata;
   4. sa i se masoare suprafata;
   
   
4. Cānd circuitul electric este īnchis:
   1. cationii din solutie sunt trecuti īn proba ca metale;
   2. curent electric evita proba si hārtia;
   3. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   4. anionii din solutie sunt trecuti īn proba ca metale;
   5. curent electric trece prin proba si hārtie;
   
   
5. Cānd plumbul este identificat:
   1. apare un complex violet;
   2. apare un complex albastru;
   3. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   4. reactiile utilizate īn mod clar ii indica prezenta;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When lead is identified:
   1. a red-brown complex appears;
   2. a violet complex appears;
   3. precautions should be made for toxic wastes disposal;
   4. interference of other ions may affect the outcome;
   
   
2. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as cations;
   2. water dissociation is inhibited;
   3. anions from the solution are passed into sample as metals;
   4. electric current avoids the sample and the paper;
   
   
3. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
4. Why moisten the paper with solution of sodium nitrate?
   1. to accomodate ourselves to use chemicals;
   2. for the paper to work as isolator;
   3. to be cut easily with scissors;
   4. for stopping after a while the chemical reaction that takes place;
   
   
5. This method of analysis of metals and alloys is:
   1. useful for pure metals, not so useful for alloys;
   2. a nondestructive method of analysis;
   3. too ancient to be used today in the laboratory;
   4. a destructive method of analysis;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd plumbul este identificat:
   1. apare un complex rosu-brun;
   2. apare un complex violet;
   3. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   4. interferenta altor ioni poate afecta rezultatul;
   5. apare un complex albastru;
   
   
2. Cānd circuitul electric este īnchis:
   1. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   2. disocierea apei este inhibata;
   3. anionii din solutie sunt trecuti īn proba ca metale;
   4. curent electric evita proba si hārtia;
   5. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   
   
3. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
4. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. sa ne acomodam in a utiliza substante chimice;
   2. pentru ca hartia sa actioneze ca izolator;
   3. sa fie taiat cu usurinta cu foarfeca;
   4. pentru oprirea dupa un timp reactiei chimice care are loc;
   
   
5. Aceasta metoda de analiza de metale si aliaje este:
   1. utila pentru metale pure, nu atāt de utila pentru aliaje;
   2. o metoda nedistructiva de analiza;
   3. prea veche pentru a fi utilizata īn prezent īn laborator;
   4. o metoda distructiva de analiza;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   
   
2. This method of analysis of metals and alloys is:
   1. useful for pure metals, not so useful for alloys;
   2. useful for alloys, not so useful for metals;
   3. a nondestructive method of analysis;
   4. a destructive method of analysis;
   
   
3. When the electrical circuit is closed:
   1. electric current avoids the sample and the paper;
   2. water dissociation is inhibited;
   3. elements from the metals are passed into solution as anions;
   4. elements from the solution are passed into sample as metals;
   
   
4. Why moisten the paper with solution of sodium nitrate?
   1. to provide cations for analysis;
   2. to accomodate ourselves to use chemicals;
   3. for stopping after a while the chemical reaction that takes place;
   4. for the paper to work as isolator;
   
   
5. The paper requires before analysis of the sample:
   1. to be moistened with an electrolyte;
   2. to be tested;
   3. to be dry;
   4. to be cut in small pieces;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   
   
2. Aceasta metoda de analiza de metale si aliaje este:
   1. utila pentru metale pure, nu atāt de utila pentru aliaje;
   2. utila pentru aliaje, nu atāt de utila pentru metale;
   3. o metoda nedistructiva de analiza;
   4. o metoda distructiva de analiza;
   
   
3. Cānd circuitul electric este īnchis:
   1. curent electric evita proba si hārtia;
   2. disocierea apei este inhibata;
   3. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   4. elemente din solutie sunt trecute īn proba ca metale;
   5. cationii din solutie sunt trecuti īn proba ca metale;
   
   
4. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru furniza cationi pentru analiza;
   2. sa ne acomodam in a utiliza substante chimice;
   3. pentru oprirea dupa un timp reactiei chimice care are loc;
   4. pentru ca hartia sa actioneze ca izolator;
   5. pentru a avea ceva de a face īn laborator;
   
   
5. Hartia necesita ca īnainte de analiza probei:
   1. sa fie umezita cu un electrolit;
   2. sa fie testata;
   3. sa fie uscata;
   4. sa fie taiata īn bucati mici;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The equivalence point is:
   1. the point in which a reactive should be added in the reaction flask;
   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 burette;
   4. used to balance the equation;
   
   
2. Reactions between acids and bases:
   1. always have as a consequence the formation of a quantity of water;
   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;
   
   
3. The indicator should be added:
   1. in large quantities, according to the principle 'only size matters';
   2. only at the suggestion of the supervisor;
   3. to provide a color change at equivalence point;
   4. to indicate our safety limits when we dealt with chemicals;
   
   
4. Titration as a laboratory operation involves:
   1. a pH indicator that changes color depending on the pH of the solution;
   2. a pH-metter;
   3. a mass measurement;
   4. a sulphuric acid solution;
   
   
5. 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 energy;
   3. all glassware should be clean before and after conducting the experiment;
   4. the principle of the conservation of the volume;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   2. punctul īn care un reactiv este consumat complet īn reactie;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   4. folosit pentru a echilibra ecuatia;
   
   
2. Reactiile īntre acizi si baze:
   1. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   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;
   
   
3. Trebuie adaugat indicatorul:
   1. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   2. numai la sugestia supraveghetorului;
   3. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   4. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   5. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   
   
4. Titrarea ca o operatiune de laborator implica:
   1. un indicator de pH care īsi schimba culoarea īn functie de pH-ul solutiei;
   2. un pH-metru;
   3. masurarea masei;
   4. o solutie de acid sulfuric;
   
   
5. 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 energiei;
   3. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   4. principiul conservarii volumului;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. Titration as a laboratory operation involves:
   1. a sulphuric acid solution;
   2. a natrium hydroxide solution;
   3. a standard or referential reactive;
   4. an mixing of two ore more solutions;
   
   
2. The equivalence point is:
   1. used to balance the equation;
   2. the point in which a reactive should be added in the burette;
   3. indicated when a color change is observed into the solution;
   4. the point in which a reactive should be added in the reaction flask;
   
   
3. The indicator should be added:
   1. in large quantities, according to the principle 'only size matters';
   2. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   3. only at the suggestion of the supervisor;
   4. in small quantities, to avoid the errors in observations and in calculations;
   
   
4. The density of the solutions depends on:
   1. provider;
   2. pressure;
   3. temperature;
   4. time elapsed since were prepared;
   
   
5. In the calculations:
   1. are necessary to establish the coefficients of the chemical reaction;
   2. are necessary to use some formulas expressing in different ways the concentration;
   3. are necessary to take the results imediatly after these are available from others;
   4. are necessary to use our phones;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Titrarea ca o operatiune de laborator implica:
   1. o solutie de acid sulfuric;
   2. o solutie de hidroxid de sodiu;
   3. un standard sau reactiv de referinta;
   4. amestecul a doua sau mai multe solutii;
   5. masurarea volumului;
   
   
2. Punctul de echivalenta este:
   1. folosit pentru a echilibra ecuatia;
   2. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   3. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   4. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   
   
3. Trebuie adaugat indicatorul:
   1. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   2. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   3. numai la sugestia supraveghetorului;
   4. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   5. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   
   
4. Densitatea solutiilor depinde de:
   1. furnizor;
   2. presiune;
   3. temperatura;
   4. timpul scurs de cand au fost pregatite;
   5. cantitate;
   
   
5. In calcule:
   1. este necesara stabilirea coeficientilor reactiei chimice;
   2. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   3. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   4. este necesar sa utilizam telefoanele;
   5. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. Titration as a laboratory operation involves:
   1. a pH-metter;
   2. a mass measurement;
   3. an mixing of two ore more solutions;
   4. a natrium hydroxide solution;
   
   
2. A redox process:
   1. involves changing of the oxidation states of some participants to the reaction;
   2. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. involves a transfer of electrons from one atom or group of atoms to another;
   4. is always fast and safe;
   
   
3. The equivalence point is:
   1. indicated when a color change is observed into the solution;
   2. something rarely encountered in chemistry;
   3. the point in which a reactive should be added in the reaction flask;
   4. used to balance the equation;
   
   
4. Reactions between acids and bases:
   1. have as effect the change of the color of a solution;
   2. are rarely useful, and even rarely used;
   3. are always fast, taking place almost instantaneously;
   4. have as a consequence the dissolution of a salt;
   
   
5. The following chemical reactions were used in the experiments:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. H₂O + CO₂ -> H₂CO₃
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Titrarea ca o operatiune de laborator implica:
   1. un pH-metru;
   2. masurarea masei;
   3. amestecul a doua sau mai multe solutii;
   4. o solutie de hidroxid de sodiu;
   
   
2. Un proces redox:
   1. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   2. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   4. este īntotdeauna rapid si sigur;
   5. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   
   
3. Punctul de echivalenta este:
   1. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   2. ceva rar īntālnit īn chimie;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   4. folosit pentru a echilibra ecuatia;
   5. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   
   
4. Reactiile īntre acizi si baze:
   1. au ca efect schimbarea culorii unei solutii;
   2. sunt rareori utile, si chiar mai rar utilizate;
   3. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   4. au drept consecinta dizolvarea unei sari;
   
   
5. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. H₂O + CO₂ -> H₂CO₃
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. In the calculations:
   1. are necessary to draw the tables in our notebooks after completing of the experiment;
   2. are necessary to use some formulas expressing in different ways the concentration;
   3. are necessary to take some information from reagent bottles;
   4. are necessary to discuss with our colleagues;
   
   
2. The indicator should be added:
   1. to indicate our safety limits when we dealt with chemicals;
   2. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   3. only at the suggestion of the supervisor;
   4. only in special cases, when the burette is graded from its bottom to its top;
   
   
3. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the energy;
   2. the principle of the conservation of the number of atoms for each element;
   3. the liquid in the burette should be at the same level before and after conducting the experiment;
   4. the principle of the conservation of the volume;
   
   
4. Reactions between acids and bases:
   1. are all exothermic, being therefore dangerous outside of the laboratory;
   2. are always fast, taking place almost instantaneously;
   3. are rarely useful, and even rarely used;
   4. have as a consequence the dissolution of a salt;
   
   
5. The equivalence point is:
   1. the point in which a reactive is fully consumed in the reaction;
   2. something rarely encountered in chemistry;
   3. the point in which a reactive should be added in the burette;
   4. used to balance the equation;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. In calcule:
   1. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   2. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   3. este necesar a se lua unele informatii de pe sticlele de reactivi;
   4. este necesar sa discutam cu colegii;
   5. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   
   
2. Trebuie adaugat indicatorul:
   1. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   2. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   3. numai la sugestia supraveghetorului;
   4. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   
   
3. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii energiei;
   2. principiul conservarii numarul de atomi pentru fiecare element;
   3. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   4. principiul conservarii volumului;
   
   
4. Reactiile īntre acizi si baze:
   1. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   2. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   3. sunt rareori utile, si chiar mai rar utilizate;
   4. au drept consecinta dizolvarea unei sari;
   5. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   
   
5. Punctul de echivalenta este:
   1. punctul īn care un reactiv este consumat complet īn reactie;
   2. ceva rar īntālnit īn chimie;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   4. folosit pentru a echilibra ecuatia;
   5. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. A redox process:
   1. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. involves changing of the oxidation states of some participants to the reaction;
   4. occurs only when we mix wrong substances in the laboratory;
   
   
2. In the calculations:
   1. are necessary to draw the tables in our notebooks after completing of the experiment;
   2. are necessary to take the results imediatly after these are available from others;
   3. are necessary to use our phones;
   4. are necessary to use some formulas expressing in different ways the concentration;
   
   
3. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the energy;
   2. all glassware should be clean before, after and during the experiment;
   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;
   
   
4. Reactions between acids and bases:
   1. always have as a consequence the formation of a quantity of water;
   2. are always fast, taking place almost instantaneously;
   3. are rarely useful, and even rarely used;
   4. have as effect the change of the color of a solution;
   
   
5. The indicator should be added:
   1. in large quantities, according to the principle 'only size matters';
   2. to indicate our safety limits when we dealt with chemicals;
   3. only at the suggestion of the supervisor;
   4. to provide a color change at equivalence point;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Un proces redox:
   1. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   4. apare numai atunci cānd se amesteca substante gresit īn laborator;
   
   
2. In calcule:
   1. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   2. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   3. este necesar sa utilizam telefoanele;
   4. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   5. este necesar a se lua unele informatii de pe sticlele de reactivi;
   
   
3. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii energiei;
   2. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   3. principiul conservarii volumului;
   4. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   
   
4. Reactiile īntre acizi si baze:
   1. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   2. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   3. sunt rareori utile, si chiar mai rar utilizate;
   4. au ca efect schimbarea culorii unei solutii;
   
   
5. Trebuie adaugat indicatorul:
   1. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   2. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   3. numai la sugestia supraveghetorului;
   4. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. mineral acidity;
   2. hardness;
   3. total alkalinity;
   4. color;
   
   
2. In the laboratory were analyzed:
   1. the mass of the water;
   2. the softness of the water;
   3. the hardness of the water;
   4. the color of the water;
   
   
3. We may say the followings:
   1. purification of the water may include physical processes;
   2. purification of the water may include chemical processes;
   3. water is a good polar solvent;
   4. water is good for drinking, it is nothing to be analysed;
   
   
4. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   2. HCl + HO⁺ -> H₂O + Cl⁺
   3. HCl + HO^- -> H₂O + Cl^-
   4. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   
   
5. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   2. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   3. NaOH + HCOO^- -> HCOONa + HO^-
   4. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. aciditate minerala;
   2. duritate;
   3. alcalinitate totala;
   4. culoare;
   5. aciditate totala;
   
   
2. Īn laborator au fost analizate:
   1. masa apei;
   2. moliciunea apei;
   3. duritatea apei;
   4. culoarea apei;
   
   
3. Putem spune urmatoarele:
   1. purificarea apei poate include procedee fizice;
   2. purificarea apei poate include procese chimice;
   3. apa este un solvent polar bun;
   4. apa este buna pentru consum, nu este nimic de a fi analizat;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   2. HCl + HO⁺ -> H₂O + Cl⁺
   3. HCl + HO^- -> H₂O + Cl^-
   4. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   5. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CO₃^2- -> HCO₃^- + HO^-
   2. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   3. NaOH + HCOO^- -> HCOONa + HO^-
   4. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   5. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. permanent alkalinity;
   2. mineral acidity;
   3. total alkalinity;
   4. hardness;
   
   
2. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. HCl + HO^- -> H₂O + Cl^-
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   
   
3. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   3. HCl + HO^- -> H₂O + Cl^-
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   
4. In the laboratory were analyzed:
   1. the boiling point of the water;
   2. the hardness of the water;
   3. the acidity of the water;
   4. the solubility of the water;
   
   
5. We may say the followings:
   1. water is a good polar solvent;
   2. purification of the water may include biological processes;
   3. when water contains dissolved minerals and gases is bad for drinking;
   4. purification of the water may include chemical processes;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. alcalinitate permanenta;
   2. aciditate minerala;
   3. alcalinitate totala;
   4. duritate;
   5. culoare;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. HCl + HO^- -> H₂O+Cl^-
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   3. HCl + HO^- -> H₂O + Cl^-
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   
4. Īn laborator au fost analizate:
   1. punctul de fierbere al apei;
   2. duritatea apei;
   3. aciditatea apei;
   4. solubilitatea apei;
   
   
5. Putem spune urmatoarele:
   1. apa este un solvent polar bun;
   2. purificarea apei poate include procese biologice;
   3. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   4. purificarea apei poate include procese chimice;
   
   

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 + PO₄^3- -> H₂PO₄^- + Cl^-
   4. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   
   
2. In the laboratory the water were:
   1. softened using the resin column;
   2. alkalinized for drinking purposes;
   3. complexed by using EDTA titrimetric method;
   4. biologically purified using the resin column;
   
   
3. In the laboratory were analyzed:
   1. the temperature of the water;
   2. the alkalinity of the water;
   3. the solubility of the water;
   4. the acidity of the water;
   
   
4. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Cl^- -> NaCl + HO^-
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   
   
5. For a water sample following measures may be quantitatively expressed:
   1. hardness;
   2. purity;
   3. total acidity;
   4. mineral acidity;
   
   

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 + PO₄^3- -> H₂PO₄^- + Cl^-
   4. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   
   
2. In laborator apa au fost:
   1. dedurizata folosind coloana de rasina;
   2. alcalinizeaza pentru baut;
   3. complexata prin metoda titrimetrica EDTA;
   4. purificata biologic utilizānd coloana de rasina;
   
   
3. Īn laborator au fost analizate:
   1. temperatura apei;
   2. alcalinitatea apei;
   3. solubilitatea apei;
   4. aciditatea apei;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + Cl^- -> NaCl + HO^-
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   
   
5. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. duritate;
   2. puritate;
   3. aciditate totala;
   4. aciditate minerala;
   5. 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. HCl + HO^- -> H₂O + Cl^-
   3. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   
   
2. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. for indication of the equilibrium point in the reaction;
   3. for recharging of the resin for water softening;
   4. for safety precautions purposes;
   
   
3. We may say the followings:
   1. purification of the water may include physical processes;
   2. purification of the water may include labeling processes;
   3. water is a good polar solvent;
   4. purification of the water may include biological processes;
   
   
4. For a water sample following measures may be quantitatively expressed:
   1. color;
   2. mineral acidity;
   3. total alkalinity;
   4. permanent alkalinity;
   
   
5. In the laboratory the water were:
   1. complexed by using EDTA titrimetric method;
   2. alkalinized for drinking purposes;
   3. acidified for drinking purposes;
   4. biologically purified using the resin column;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. HCl + HO^- -> H₂O + Cl^-
   3. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   5. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   
2. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. pentru indicarea punctului de echilibru īn reactie;
   3. pentru reīncarcarea rasinii la dedurizarea apei;
   4. ca masura de siguranta;
   
   
3. Putem spune urmatoarele:
   1. purificarea apei poate include procedee fizice;
   2. purificarea apei poate include procesele de etichetare;
   3. apa este un solvent polar bun;
   4. purificarea apei poate include procese biologice;
   5. apa naturala poate contine materie organica si organisme vii;
   
   
4. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. culoare;
   2. aciditate minerala;
   3. alcalinitate totala;
   4. alcalinitate permanenta;
   
   
5. In laborator apa au fost:
   1. complexata prin metoda titrimetrica EDTA;
   2. alcalinizeaza pentru baut;
   3. acidulata pentru baut;
   4. purificata biologic utilizānd coloana de rasina;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Cl^- -> NaCl + HO^-
   2. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   
   
2. For a water sample following measures may be quantitatively expressed:
   1. permanent alkalinity;
   2. mineral acidity;
   3. hardness;
   4. color;
   
   
3. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   2. NaOH + HCOO⁺ -> HCOONa + HO⁺
   3. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   4. NaOH + HCOO^- -> HCOONa + HO^-
   
   
4. In the laboratory the water were:
   1. acidified for drinking purposes;
   2. softened using the resin column;
   3. alkalinized for drinking purposes;
   4. complexed by using EDTA titrimetric method;
   
   
5. EDTA is used:
   1. for complexing of Na¹⁺ and K¹⁺ ions;
   2. for indication of the equilibrium point in the reaction;
   3. as reagent for determining the hardness of the water;
   4. for safety precautions purposes;
   
   

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 + Cl^- -> NaCl + HO^-
   2. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   
   
2. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. alcalinitate permanenta;
   2. aciditate minerala;
   3. duritate;
   4. culoare;
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   2. NaOH + HCOO⁺ -> HCOONa + HO⁺
   3. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   4. NaOH + HCOO^- -> HCOONa + HO^-
   5. NaOH + CO₃^2- -> HCO₃^- + HO^-
   
   
4. In laborator apa au fost:
   1. acidulata pentru baut;
   2. dedurizata folosind coloana de rasina;
   3. alcalinizeaza pentru baut;
   4. complexata prin metoda titrimetrica EDTA;
   
   
5. EDTA este utilizat:
   1. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   2. pentru indicarea punctului de echilibru īn reactie;
   3. ca reactiv pentru determinarea duritatii apei;
   4. ca masura de siguranta;
   5. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   
   

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

1. The zinc plate:
   1. the volume is measured before and after immersing it in H₂SO₄;
   2. the surface is measured before and after immersing it in H₂SO₄;
   3. was involved in the volumetric method of corrosion analysis
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
2. Corrosion of metals:
   1. is helping in the process of cleaning the metals surfaces;
   2. is the destruction of metals under the action of external factors;
   3. is the protection in time to chemical agents;
   4. may provide useful raw materials for analysis;
   
   
3. In studied corrosion processes:
   1. always the metal changes its oxidation state;
   2. a gas is released at both corrosion of zinc and aluminum;
   3. a gas is released only the corrosion of zinc;
   4. a gas is released only the corrosion of aluminum;
   
   
4. The aluminum plate:
   1. was involved in the gravimetric method of corrosion analysis
   2. was involved in the volumetric method of corrosion analysis
   3. the surface is measured before and after immersing it in NaOH;
   4. was degreased in sodium hydroxide solution;
   
   
5. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. ZnO + CO -> Zn + CO₂
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   

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

1. Pentru placa de zinc:
   1. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   2. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   5. a fost corodata īn solutie sulfuric;
   
   
2. Coroziunea metalelor:
   1. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   2. este distrugerea metalelor sub actiunea factorilor externi;
   3. este protectia de durata impotriva agentilor chimici;
   4. poate furniza materii prime utile pentru analiza;
   
   
3. Īn procesele de coroziune studiate:
   1. īntotdeauna metalul isi schimba starea de oxidare;
   2. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   3. un gaz este eliberat numai la corodarea zincului;
   4. un gaz este eliberat numai la corodarea aluminiului;
   
   
4. Pentru placa de aluminiu:
   1. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. suprafata se masoara īnainte si dupa imersia īn NaOH;
   4. a fost degresata īn solutie de hidroxid de sodiu;
   5. a fost corodata īn solutie de hidroxid de sodiu;
   
   
5. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. ZnO + CO -> Zn + CO₂
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   

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

1. In studied corrosion processes:
   1. always the metal changes its oxidation state;
   2. the metal it changes its oxidation state becoming an anion;
   3. a gas is released only the corrosion of zinc;
   4. a gas is released at both corrosion of zinc and aluminum;
   
   
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. takes place merely from exposure to moisture in air;
   
   
3. The aluminum plate:
   1. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   2. was involved in the gravimetric method of corrosion analysis
   3. was corroded in sodium hydroxide solution;
   4. the mass is measured before and after immersing it in NaOH;
   
   
4. The zinc plate:
   1. the mass is measured before and after immersing it in H₂SO₄;
   2. was involved in the gravimetric method of corrosion analysis
   3. was involved in the volumetric method of corrosion analysis
   4. was corroded in sulfuric solution;
   
   
5. Which of the following reactions may be called as of corrosion:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. ZnO + CO -> Zn + CO₂
   3. Ni(CO)₄ -> Ni + CO
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   

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

1. Īn procesele de coroziune studiate:
   1. īntotdeauna metalul isi schimba starea de oxidare;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. un gaz este eliberat numai la corodarea zincului;
   4. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   
   
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. are loc pur si simplu prin expunerea la umiditate īn aer;
   5. este protectia de durata impotriva agentilor chimici;
   
   
3. Pentru placa de aluminiu:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. a fost corodata īn solutie de hidroxid de sodiu;
   4. masa este masurata īnainte si dupa imersia īn NaOH;
   
   
4. Pentru placa de zinc:
   1. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. a fost corodata īn solutie sulfuric;
   
   
5. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. ZnO + CO -> Zn + CO₂
   3. Ni(CO)₄ -> Ni + CO
   4. Al₂O₃ + NaOH -> NaAlO₂
   5. Fe₂O₃ + CO -> Fe + CO₂
   
   

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

1. The zinc plate:
   1. the volume is measured before and after immersing it in H₂SO₄;
   2. was degreased in sulfuric acid solution;
   3. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   4. the mass is measured before and after immersing it in H₂SO₄;
   
   
2. The aluminum plate:
   1. was corroded in sodium hydroxide solution;
   2. was degreased in sodium hydroxide solution;
   3. was involved in the gravimetric method of corrosion analysis
   4. the mass is measured before and after immersing it in NaOH;
   
   
3. Which of the following reactions may be called as of corrosion:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. Fe₂O₃ + CO -> Fe + CO₂
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. H⁺ + Zn -> H₂ + Zn²⁺
   
   
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. always the metal changes its oxidation state;
   4. a gas is released at both corrosion of zinc and aluminum;
   
   
5. Corrosion of metals:
   1. is the protection in time to chemical agents;
   2. can be reduced by electroplating;
   3. is helping in the process of cleaning the metals surfaces;
   4. is the destruction of metals under the action of external factors;
   
   

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

1. Pentru placa de zinc:
   1. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   2. a fost degresata īn solutie de acid sulfuric;
   3. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   4. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   5. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
2. Pentru placa de aluminiu:
   1. a fost corodata īn solutie de hidroxid de sodiu;
   2. a fost degresata īn solutie de hidroxid de sodiu;
   3. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   4. masa este masurata īnainte si dupa imersia īn NaOH;
   5. volumul se masoara īnainte si dupa imersia īn NaOH;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. Fe₂O₃ + CO -> Fe + CO₂
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. H⁺ + Zn -> H₂ + Zn²⁺
   5. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   
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. īntotdeauna metalul isi schimba starea de oxidare;
   4. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   
   
5. Coroziunea metalelor:
   1. este protectia de durata impotriva agentilor chimici;
   2. poate fi redusa prin galvanizare;
   3. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   4. este distrugerea metalelor sub actiunea factorilor externi;
   5. este un proces benefic care arata stabilitatea metalelor;
   
   

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

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

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

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

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

1. Corrosion of metals:
   1. may provide useful raw materials for analysis;
   2. is helping in the process of cleaning the metals surfaces;
   3. can be reduced by passivation;
   4. is a beneficial process that shows the stability of metals;
   
   
2. The zinc plate:
   1. was corroded in sulfuric solution;
   2. was degreased in sulfuric acid solution;
   3. the mass is measured before and after immersing it in H₂SO₄;
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
3. 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. always the metal changes its oxidation state;
   4. the metal it changes its oxidation state becoming an cation;
   
   
4. The aluminum plate:
   1. the mass is measured before and after immersing it in NaOH;
   2. was corroded in sodium hydroxide solution;
   3. was involved in the volumetric method of corrosion analysis
   4. was degreased in sodium hydroxide solution;
   
   
5. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. Ni(CO)₄ -> Ni + CO
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   

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

1. Coroziunea metalelor:
   1. poate furniza materii prime utile pentru analiza;
   2. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   3. poate fi redusa prin pasivare;
   4. este un proces benefic care arata stabilitatea metalelor;
   5. poate fi redusa prin galvanizare;
   
   
2. Pentru placa de zinc:
   1. a fost corodata īn solutie sulfuric;
   2. a fost degresata īn solutie de acid sulfuric;
   3. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
3. 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. īntotdeauna metalul isi schimba starea de oxidare;
   4. metalul isi schimba starea de oxidare pentru a deveni un cation;
   
   
4. Pentru placa de aluminiu:
   1. masa este masurata īnainte si dupa imersia īn NaOH;
   2. a fost corodata īn solutie de hidroxid de sodiu;
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. a fost degresata īn solutie de hidroxid de sodiu;
   
   
5. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. Ni(CO)₄ -> Ni + CO
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. Theoretical mass of nickel deposited is calculated using:
   1. the conservation of the number of atoms for each element law;
   2. the electrolysis law;
   3. law of mass action;
   4. the conservation of the energy law;
   
   
2. It is expected to have a mass of nickel deposited:
   1. inversely proportional with the intensity of the current used;
   2. inversely proportional with the surface of the sample;
   3. much lower than the calculated theoretical one;
   4. proportional with the surface of the sample;
   
   
3. Electrical conductivity of nickel salts solutions:
   1. depends on the intensity of the current used;
   2. is relatively high;
   3. depends on the potential of the source used;
   4. is reduced by salts additions;
   
   
4. The intensity of the current:
   1. is to be adjusted when the experiment starts;
   2. is to be calculated before to start the experiment;
   3. does not affect the quality nor the quantity of the nickel deposition;
   4. affect only the quantity of the nickel deposition;
   
   
5. 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 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. conservarea numarului de atomi pentru fiecare element;
   2. legea electrolizei;
   3. legea actiunii maselor;
   4. legea conservarii energiei;
   5. legea solutilor;
   
   
2. Este de asteptat ca masa de nichel depus sa fie:
   1. invers proportionala cu intensitatea curentului utilizat;
   2. invers proportionala cu suprafata probei;
   3. mult mai mica decāt cea teoretica calculata;
   4. proportionala cu suprafata probei;
   5. mult mai mare decāt cea teoretica calculata;
   
   
3. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. depinde de intensitatea curentului utilizat;
   2. este relativ mare;
   3. depinde de potentialul sursei utilizate;
   4. este redusa prin adaosuri de saruri;
   
   
4. Intensitatea curentului:
   1. trebuie sa fie ajustata cand se incepe experimentul;
   2. trebuie sa fie calculata īnainte de a īncepe experimentul;
   3. nu afecteaza calitatea nici cantitatea nichelului depus;
   4. afecteaza numai cantitatea de nichel depus;
   5. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   
   
5. 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 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⁺
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. Theoretical mass of nickel deposited is calculated using:
   1. solutions laws;
   2. law of mass action;
   3. the conservation of the energy law;
   4. perfect gas law;
   
   
2. It is expected to have a mass of nickel deposited:
   1. higher than the calculated theoretical one;
   2. much lower than the calculated theoretical one;
   3. inversely proportional with the surface of the sample;
   4. proportional with the surface of the sample;
   
   
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 anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   4. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   
   
4. The intensity of the current:
   1. does not affect the quality nor the quantity of the nickel deposition;
   2. affect only the quality of the nickel deposition;
   3. should be adjusted by the technicians, we have nothing to do there;
   4. is to be calculated after conducting the experiment;
   
   
5. Electrical conductivity of nickel salts solutions:
   1. is reduced by salts additions;
   2. depends on the potential of the source used;
   3. is relatively small;
   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 solutilor;
   2. legea actiunii maselor;
   3. legea conservarii energiei;
   4. legea gazelor perfecte;
   5. legea electrolizei;
   
   
2. Este de asteptat ca masa de nichel depus sa fie:
   1. mai mare decāt cea teoretica calculata;
   2. mult mai mica decāt cea teoretica calculata;
   3. invers proportionala cu suprafata probei;
   4. proportionala cu suprafata probei;
   
   
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 anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   4. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   5. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la anod: O^2- - 2e^- -> O₂⁰
   
   
4. Intensitatea curentului:
   1. nu afecteaza calitatea nici cantitatea nichelului depus;
   2. afecteaza numai calitatea depunerii nichelului;
   3. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   4. se calculeaza dupa efectuarea experimentului;
   5. depinde de suprafata probei;
   
   
5. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este redusa prin adaosuri de saruri;
   2. depinde de potentialul sursei utilizate;
   3. este relativ mica;
   4. este relativ mare;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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