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

1. We may say the followings:
   1. the molecules have speeds in all gaseous, liquid and solid states;
   2. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   3. diffusion process appears in all gaseous, liquid and solid states;
   4. diffusion process appears only in gaseous state;
   
   
2. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the diffusion coefficients;
   2. extracting the information necessary to calculate the speeds ratio;
   3. to keep us busy;
   4. measuring of the diffusion time;
   
   
3. The time to the formation of the ring in the experiment is dependent on:
   1. the length of the tube and the width of the tube;
   2. the propagation of the species as ions and not as neutral molecules;
   3. the average energy or average speed of each involved species;
   4. the real speeds and not the virtual speeds of each involved species;
   
   
4. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory or our breathing;
   2. our experiment designed to trap the product of the reaction;
   3. presence of the ammonia;
   4. formation of ammonium chloride;
   
   
5. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same energy;
   2. all are moving in the same direction;
   3. are considered to be at the same temperature, but may have different speeds;
   4. are considered to be at the same temperature, but may have different energies;
   
   

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

1. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   2. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   3. proces de difuzie apare īn toate starile gazoasa, lichida si solida;
   4. proces de difuzie apare numai īn stare gazoasa;
   
   
2. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   2. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   3. sa ne tina ocupati;
   4. masurarea timpului de difuzie;
   
   
3. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si latimea tubului;
   2. propagarea speciilor ca ionii si nu ca si molecule neutre;
   3. energia medie sau viteza medie a fiecarei specii implicate;
   4. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   5. lungimea tubului si nu latimea tubului;
   
   
4. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   2. experimentului nostru proiectat pentru a captura produsul de reactie;
   3. prezentei amoniacului;
   4. formarea clorurii de amoniu;
   
   
5. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate au aceeasi energie;
   2. toate se deplaseaza īn aceeasi directie;
   3. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   4. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   5. toate se īndreapta īntr-o directie arbitrara;
   
   

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

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

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

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

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

1. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the diffusion coefficients;
   2. indication of the moment when we should pay attention to the experiment;
   3. to keep us busy;
   4. synchronization of the diffusion times;
   
   
2. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   2. NH₄⁺ + Cl^- \=\ NH₄Cl
   3. NH₃ + HCl \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   
   
3. The fog observed during the experiment is due to:
   1. formation of ammonium chloride;
   2. unproper illumination in the laboratory or our breathing;
   3. unproper illumination in the laboratory and our breathing;
   4. presence of the ammonia;
   
   
4. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all are moving in the same direction;
   2. are considered to be at the same temperature, but may have different speeds;
   3. all have same energy;
   4. all have same speed;
   
   
5. We may say the followings:
   1. the molecules have speeds in all gaseous, liquid and solid states;
   2. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   3. diffusion process appears in all gaseous, liquid and solid states;
   4. the molecules have speeds only in gaseous and liquid states;
   
   

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

1. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   2. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   3. sa ne tina ocupati;
   4. sincronizarea timpilor de difuzie;
   5. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   
   
2. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   2. NH₄⁺ + Cl^- \=\ NH₄Cl
   3. NH₃ + HCl \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   5. H₂O \=\ H⁺ + HO^-
   
   
3. Ceata observata īn timpul experimentului se datoreaza:
   1. formarea clorurii de amoniu;
   2. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   3. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   4. prezentei amoniacului;
   5. prezentei clorului;
   
   
4. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate se deplaseaza īn aceeasi directie;
   2. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   3. toate au aceeasi energie;
   4. toate au aceeasi viteza;
   5. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   
   
5. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   2. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   3. proces de difuzie apare īn toate starile gazoasa, lichida si solida;
   4. moleculele au viteze numai īn stare gazoasa si lichida;
   
   

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

1. At the ends of the tube following equilibrium reactions occurs:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. H⁺ + HO^- \=\ H₂O
   3. HCl + H₂O \=\ Cl^- + H₃O⁺
   4. H₂O \=\ H⁺ + HO^-
   
   
2. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory or our breathing;
   2. presence of the ammonia;
   3. formation of ammonium chloride;
   4. presence of the chlorine;
   
   
3. The chronometer is used in the experiment for:
   1. measuring of the diffusion time;
   2. extracting the information necessary to calculate the diffusion coefficients;
   3. extracting the information necessary to calculate the speeds ratio;
   4. to keep us busy;
   
   
4. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all are moving in an arbitrary direction;
   2. all are moving in the same direction;
   3. all have same speed;
   4. are considered to be at the same temperature, but may have different energies;
   
   
5. The position of the ring in the experiment is dependent on:
   1. the virtual speeds and not the real speeds of each involved species;
   2. the width of the tube and not of the length of the tube;
   3. the mode energy or mode speed of each involved species;
   4. the propagation of the species as neutral molecules and not as ions;
   
   

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

1. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. H⁺ + HO^- \=\ H₂O
   3. HCl + H₂O \=\ Cl^- + H₃O⁺
   4. H₂O \=\ H⁺ + HO^-
   
   
2. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   2. prezentei amoniacului;
   3. formarea clorurii de amoniu;
   4. prezentei clorului;
   
   
3. Cronometrul este utilizat īn experimentul pentru:
   1. masurarea timpului de difuzie;
   2. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   3. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   4. sa ne tina ocupati;
   
   
4. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate se īndreapta īntr-o directie arbitrara;
   2. toate se deplaseaza īn aceeasi directie;
   3. toate au aceeasi viteza;
   4. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   
   
5. Pozitia inelului īn experimentul este dependenta de:
   1. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   2. latimea tubului si nu lungimea tubului;
   3. viteza la moda sau energia la moda a fiecarei specii implicate;
   4. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   
   

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. all have same speed;
   3. all have same energy;
   4. all are moving in an arbitrary direction;
   
   
2. The position of the ring in the experiment is dependent on:
   1. the mode energy or mode speed of each involved species;
   2. the width of the tube and not of the length of the tube;
   3. the length of the tube and the width of the tube;
   4. the length of the tube and not of the width of the tube;
   
   
3. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory and our breathing;
   2. our experiment designed to trap the product of the reaction;
   3. unproper illumination in the laboratory or our breathing;
   4. presence of the ammonia;
   
   
4. At the ends of the tube following equilibrium reactions occurs:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. H⁺ + HO^- \=\ H₂O
   3. NH₃ + HCl \=\ NH₄Cl
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
5. We may say the followings:
   1. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   2. the molecules have energy only in gaseous and liquid states;
   3. the molecules have speeds only in gaseous and liquid states;
   4. the molecules have speeds in all gaseous, liquid and solid states;
   
   

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. toate au aceeasi viteza;
   3. toate au aceeasi energie;
   4. toate se īndreapta īntr-o directie arbitrara;
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. viteza la moda sau energia la moda a fiecarei specii implicate;
   2. latimea tubului si nu lungimea tubului;
   3. lungimea tubului si latimea tubului;
   4. lungimea tubului si nu latimea tubului;
   
   
3. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   2. experimentului nostru proiectat pentru a captura produsul de reactie;
   3. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   4. prezentei amoniacului;
   5. formarea clorurii de amoniu;
   
   
4. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. H⁺ + HO^- \=\ H₂O
   3. NH₃ + HCl \=\ NH₄Cl
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   5. H₂O \=\ H⁺ + HO^-
   
   
5. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   2. moleculele au energie numai īn stare gazoasa si lichida;
   3. moleculele au viteze numai īn stare gazoasa si lichida;
   4. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   
   

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

1. In the laboratory were studied:
   1. the producing of some gas as result of a lost of the mass of a solid;
   2. increasing of the temperature of a solid mass when was heated;
   3. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   4. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   
   
2. The values taken from the experiment conducted in the laboratory indicated that:
   1. oxigen were released as result of the decomposition;
   2. air were released as result of the decomposition;
   3. we possess enough information to decide what gas was released from the reaction;
   4. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. Ag₂O -> Ag + O₂;
   2. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   3. KCl + O₂ -> KClO₃;
   4. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   
   
4. For gaseous state:
   1. the pressure is subject to change when a chemical reaction occurs;
   2. we need to take supplementary precautions in the laboratory;
   3. the pressure depends on the model which are used to approximate it;
   4. the pressure is exactly the same as in liquid state;
   
   
5. A state equation for a real gas is:
   1. a relation which may involve some constants dependent of gas composition;
   2. a relation which is always true, independent of the values of the state parameters;
   3. a relation between an unlimited number of state parameters;
   4. a relation which takes into account certain deviations from the ideal model;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   2. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   4. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. oxigenul au fost eliberat ca urmare a descompunerii;
   2. aer a fost eliberat ca urmare a descompunerii;
   3. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   4. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   5. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. Ag₂O -> Ag + O₂;
   2. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   3. KCl + O₂ -> KClO₃;
   4. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   
   
4. Pentru stare gazoasa:
   1. presiunea se pot modifica atunci cānd apare o reactie chimica;
   2. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   3. presiunea depinde de modelul care este utilizat pentru o aproxima;
   4. presiunea este exact la fel ca si īn stare lichida;
   5. presiunea este neschimbata cānd apare o reactie chimica;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie care poate implica unele constante dependente de compozitia gazului;
   2. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   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;
   
   

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. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. Ag₂O -> Ag + O₂;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. H₂O₂ -> H₂O + O₂;
   
   
2. For gaseous state:
   1. the pressure is approximately the same as in liquid state;
   2. the pressure is subject to change when a chemical reaction occurs;
   3. we need to take supplementary precautions in the laboratory;
   4. the pressure is exactly the same as in liquid state;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. ozone were released as result of the decomposition;
   2. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   3. air were released as result of the decomposition;
   4. oxigen were released as result of the decomposition;
   
   
4. A state equation for a real gas is:
   1. a relation which may involve some constants dependent of gas composition;
   2. a relation derived to approximate the relation between state parameters;
   3. usable in the laboratory, but is not to be used somewhere else;
   4. a relation which is always true, independent of the values of the state parameters;
   
   
5. In the laboratory were studied:
   1. the producing of some gas as result of a lost of the mass of a solid;
   2. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   3. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   4. increasing of the pressure of a gas when was heated;
   
   

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. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. Ag₂O -> Ag + O₂;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. H₂O₂ -> H₂O + O₂;
   
   
2. Pentru stare gazoasa:
   1. presiunea este aproximativ aceeasi ca si īn stare lichida;
   2. presiunea se pot modifica atunci cānd apare o reactie chimica;
   3. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   4. presiunea este exact la fel ca si īn stare lichida;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. ozonul au fost eliberat ca urmare a descompunerii;
   2. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. aer a fost eliberat ca urmare a descompunerii;
   4. oxigenul au fost eliberat ca urmare a descompunerii;
   5. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   
   
4. O ecuatie de stare pentru un gaz real este:
   1. o relatie care poate implica unele constante dependente de compozitia gazului;
   2. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   3. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   4. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   
   
5. Īn laborator s-au studiat:
   1. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   2. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   3. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   4. cresterea presiunii unui gaz cānd s-a īncalzit;
   5. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   
   

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

1. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KCl + O₂ -> KClO₃;
   2. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. KClO₃ -> KCl + O₂;
   4. H₂O + O₂ -> H₂O₂;
   
   
2. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. the producing of some gas as result of a lost of the mass of a solid;
   3. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   4. increasing of the pressure of a gas when was heated;
   
   
3. For gaseous state:
   1. the pressure is unchanged when a chemical reaction occurs;
   2. the pressure is much lower than in liquid state;
   3. the pressure is approximately the same as in liquid state;
   4. we need to take supplementary precautions in the laboratory;
   
   
4. The values taken from the experiment conducted in the laboratory indicated that:
   1. we do not possess enough information to decide what gas was released from the reaction;
   2. ozone were released as result of the decomposition;
   3. the ideal model of a gas approximated the worst the behavior of the released gas;
   4. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   
   
5. A state equation for a real gas is:
   1. a relation derived to approximate the relation between state parameters;
   2. a relation between an certain number of state parameters;
   3. a relation obtained after conducting of the experiment;
   4. usable in the laboratory, but is not to be used somewhere else;
   
   

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. KCl + O₂ -> KClO₃;
   2. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. KClO₃ -> KCl + O₂;
   4. H₂O + O₂ -> H₂O₂;
   5. Ag + O₂ -> Ag₂O;
   
   
2. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   4. cresterea presiunii unui gaz cānd s-a īncalzit;
   
   
3. 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 aproximativ aceeasi ca si īn stare lichida;
   4. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   5. presiunea depinde de modelul care este utilizat pentru o aproxima;
   
   
4. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   2. ozonul au fost eliberat ca urmare a descompunerii;
   3. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   4. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   5. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   2. o relatie īntre un anumit numar de parametri de stare;
   3. o relatie obtinut dupa efectuarea experimentului;
   4. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   
   

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

1. For gaseous state:
   1. the pressure is exactly the same as in liquid state;
   2. the pressure is much higher than in liquid state;
   3. we need to take supplementary precautions in the laboratory;
   4. the pressure is much lower than in liquid state;
   
   
2. A state equation for a real gas is:
   1. a relation derived to approximate the relation between state parameters;
   2. a relation between an unlimited number of state parameters;
   3. a relation which takes into account certain deviations from the ideal model;
   4. usable in the laboratory, but is not to be used somewhere else;
   
   
3. 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. oxigen were released as result of the decomposition;
   3. air were released as result of the decomposition;
   4. the ideal model of a gas approximated the best the behavior of the released gas;
   
   
4. In the laboratory were studied:
   1. increasing of the pressure of a gas when was heated;
   2. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   3. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   4. the lost of the mass of a solid as result of producing of some gas;
   
   
5. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O₂ -> H₂O + O₂;
   2. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   3. KNO₃ -> KNO₂ + O₂;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pentru stare gazoasa:
   1. presiunea este exact la fel ca si īn stare lichida;
   2. presiunea este mult mai mare decāt īn stare lichida;
   3. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   4. presiunea este mult mai mica decāt īn stare lichida;
   
   
2. O ecuatie de stare pentru un gaz real este:
   1. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   2. o relatie īntre un numar nelimitat de parametri de stare;
   3. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   4. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   5. o relatie īntre un anumit numar de parametri de stare;
   
   
3. 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. oxigenul au fost eliberat ca urmare a descompunerii;
   3. aer a fost eliberat ca urmare a descompunerii;
   4. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   
   
4. Īn laborator s-au studiat:
   1. cresterea presiunii unui gaz cānd s-a īncalzit;
   2. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   4. pierdut din masa de solid ca urmare a producerii unor gaze;
   
   
5. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O₂ -> H₂O + O₂;
   2. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   3. KNO₃ -> KNO₂ + O₂;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   

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. Ag + O₂ -> Ag₂O;
   2. Ag₂O -> Ag + O₂;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. KNO₂ + O₂ -> KNO₃;
   
   
2. The values taken from the experiment conducted in the laboratory indicated that:
   1. we do not possess enough information to decide what gas was released from the reaction;
   2. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   3. ozone were released as result of the decomposition;
   4. the ideal model of a gas approximated the best the behavior of the released gas;
   
   
3. For gaseous state:
   1. the pressure depends on the model which are used to approximate it;
   2. it exists an equation for all, p · V = n · R · T;
   3. the pressure is much higher than in liquid state;
   4. the pressure is exactly the same as in liquid state;
   
   
4. A state equation for a real gas is:
   1. a relation between an certain number of state parameters;
   2. a relation which is always true, independent of the values of the state parameters;
   3. a relation derived to approximate the relation between state parameters;
   4. a relation which takes into account certain deviations from the ideal model;
   
   
5. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. increasing of the temperature of a solid mass when was heated;
   3. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   4. the producing of some gas as result of a lost of the mass of a solid;
   
   

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. Ag + O₂ -> Ag₂O;
   2. Ag₂O -> Ag + O₂;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. KNO₂ + O₂ -> KNO₃;
   5. distilarea aerului lichid;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   2. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. ozonul au fost eliberat ca urmare a descompunerii;
   4. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   5. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   
   
3. Pentru stare gazoasa:
   1. presiunea depinde de modelul care este utilizat pentru o aproxima;
   2. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   3. presiunea este mult mai mare decāt īn stare lichida;
   4. presiunea este exact la fel ca si īn stare lichida;
   
   
4. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un anumit numar de parametri de stare;
   2. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   3. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   4. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   5. o relatie care poate implica unele constante dependente de compozitia gazului;
   
   
5. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   4. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   5. pierdut din masa de solid ca urmare a producerii unor gaze;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The paper requires before analysis of the sample:
   1. to measure its surface;
   2. to be burned;
   3. to be acidified;
   4. to be dry;
   
   
2. When lead is identified:
   1. a violet complex appears;
   2. precautions should be made for toxic wastes disposal;
   3. the reactions used clearly indicates its presence;
   4. dangerous substances are used;
   
   
3. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   2. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   
   
4. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as anions;
   2. electric current avoids the sample and the paper;
   3. elements from the solution are passed into sample as metals;
   4. water dissociation is inhibited;
   
   
5. Why moisten the paper with solution of sodium nitrate?
   1. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   2. to have something to do in the laboratory;
   3. for the paper to work as isolator;
   4. to accomodate ourselves to use chemicals;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Hartia necesita ca īnainte de analiza probei:
   1. sa i se masoare suprafata;
   2. sa fie arsa;
   3. sa fie acidulata;
   4. sa fie uscata;
   
   
2. Cānd plumbul este identificat:
   1. apare un complex violet;
   2. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   3. reactiile utilizate īn mod clar ii indica prezenta;
   4. sunt utilizate substante periculoase;
   5. interferenta altor ioni poate afecta rezultatul;
   
   
3. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   2. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   5. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
4. Cānd circuitul electric este īnchis:
   1. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   2. curent electric evita proba si hārtia;
   3. elemente din solutie sunt trecute īn proba ca metale;
   4. disocierea apei este inhibata;
   
   
5. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   2. pentru a avea ceva de a face īn laborator;
   3. pentru ca hartia sa actioneze ca izolator;
   4. sa ne acomodam in a utiliza substante chimice;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. Why moisten the paper with solution of sodium nitrate?
   1. to be cut easily with scissors;
   2. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   3. to have something to do in the laboratory;
   4. to provide cations for analysis;
   
   
2. The paper requires before analysis of the sample:
   1. to be tested;
   2. to be burned;
   3. to be moistened with an electrolyte;
   4. to be weighted;
   
   
3. When the electrical circuit is closed:
   1. electric current passes the sample and the paper;
   2. surface of the sample is fastly covered by a protecting shield of electrons;
   3. elements from the metals are passed into solution as anions;
   4. anions from the solution are passed into sample as metals;
   
   
4. When lead is identified:
   1. dangerous substances are used;
   2. precautions should be made for toxic wastes disposal;
   3. a heat release is observed;
   4. a blue complex appears;
   
   
5. When aluminum is identified:
   1. only one identification reaction is possible;
   2. supplementary precautions should be taken, because the plates are made from aluminum too;
   3. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   4. the presence of other ions may produce a true negative outcome;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. sa fie taiat cu usurinta cu foarfeca;
   2. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   3. pentru a avea ceva de a face īn laborator;
   4. pentru furniza cationi pentru analiza;
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa fie testata;
   2. sa fie arsa;
   3. sa fie umezita cu un electrolit;
   4. sa fie cantarita;
   
   
3. Cānd circuitul electric este īnchis:
   1. curent electric trece prin proba si hārtie;
   2. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   3. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   4. anionii din solutie sunt trecuti īn proba ca metale;
   
   
4. Cānd plumbul este identificat:
   1. sunt utilizate substante periculoase;
   2. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   3. se observa o eliberare de caldura;
   4. apare un complex albastru;
   
   
5. Cānd aluminiu este identificat:
   1. doar o reactie de identificare este posibila;
   2. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   3. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   4. prezenta altor ioni poate produce un rezultat adevarat negativ;
   5. prezenta altor ioni poate produce un rezultat fals negativ;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When lead is identified:
   1. precautions should be made for toxic wastes disposal;
   2. a blue complex appears;
   3. dangerous substances are used;
   4. the reactions used clearly indicates its presence;
   
   
2. When aluminum is identified:
   1. is identified as Al¹⁺ cation;
   2. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   3. supplementary precautions should be taken, because the plates are made from aluminum too;
   4. there are many identification reactions possible;
   
   
3. When the electrical circuit is closed:
   1. anions from the solution are passed into sample as metals;
   2. elements from the metals are passed into solution as cations;
   3. surface of the sample is fastly covered by a protecting shield of electrons;
   4. electric current avoids the sample and the paper;
   
   
4. Why moisten the paper with solution of sodium nitrate?
   1. for the paper to work as isolator;
   2. to have something to do in the laboratory;
   3. to accomodate ourselves to use chemicals;
   4. for stopping after a while the chemical reaction that takes place;
   
   
5. This method of analysis of metals and alloys is:
   1. too ancient to be used today in the laboratory;
   2. useful for pure metals, not so useful for alloys;
   3. useful for alloys, not so useful for metals;
   4. a quantitative method of analysis;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd plumbul este identificat:
   1. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   2. apare un complex albastru;
   3. sunt utilizate substante periculoase;
   4. reactiile utilizate īn mod clar ii indica prezenta;
   5. interferenta altor ioni poate afecta rezultatul;
   
   
2. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al¹⁺;
   2. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   3. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   4. exista multe reactii posibile de identificare;
   
   
3. Cānd circuitul electric este īnchis:
   1. anionii din solutie sunt trecuti īn proba ca metale;
   2. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   3. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   4. curent electric evita proba si hārtia;
   
   
4. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru ca hartia sa actioneze ca izolator;
   2. pentru a avea ceva de a face īn laborator;
   3. sa ne acomodam in a utiliza substante chimice;
   4. pentru oprirea dupa un timp reactiei chimice care are loc;
   5. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   
   
5. Aceasta metoda de analiza de metale si aliaje este:
   1. prea veche pentru a fi utilizata īn prezent īn laborator;
   2. utila pentru metale pure, nu atāt de utila pentru aliaje;
   3. utila pentru aliaje, nu atāt de utila pentru metale;
   4. o metoda cantitativa de analiza;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When the electrical circuit is closed:
   1. elements from the solution are passed into sample as metals;
   2. anions from the solution are passed into sample as metals;
   3. electric current avoids the sample and the paper;
   4. water dissociation is inhibited;
   
   
2. The paper requires before analysis of the sample:
   1. to be weighted;
   2. to be acidified;
   3. to measure its surface;
   4. to be cut in small pieces;
   
   
3. When lead is identified:
   1. dangerous substances are used;
   2. a blue complex appears;
   3. a red-brown complex appears;
   4. the reactions used clearly indicates its presence;
   
   
4. Why moisten the paper with solution of sodium nitrate?
   1. to be cut easily with scissors;
   2. for the paper to work as isolator;
   3. to provide cations for analysis;
   4. for stopping after a while the chemical reaction that takes place;
   
   
5. This method of analysis of metals and alloys is:
   1. not useful for both metals and alloys;
   2. a quantitative method of analysis;
   3. too ancient to be used today in the laboratory;
   4. useful for pure metals, not so useful for alloys;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd circuitul electric este īnchis:
   1. elemente din solutie sunt trecute īn proba ca metale;
   2. anionii din solutie sunt trecuti īn proba ca metale;
   3. curent electric evita proba si hārtia;
   4. disocierea apei este inhibata;
   5. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa fie cantarita;
   2. sa fie acidulata;
   3. sa i se masoare suprafata;
   4. sa fie taiata īn bucati mici;
   
   
3. Cānd plumbul este identificat:
   1. sunt utilizate substante periculoase;
   2. apare un complex albastru;
   3. apare un complex rosu-brun;
   4. reactiile utilizate īn mod clar ii indica prezenta;
   5. interferenta altor ioni poate afecta rezultatul;
   
   
4. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. sa fie taiat cu usurinta cu foarfeca;
   2. pentru ca hartia sa actioneze ca izolator;
   3. pentru furniza cationi pentru analiza;
   4. pentru oprirea dupa un timp reactiei chimice care are loc;
   
   
5. Aceasta metoda de analiza de metale si aliaje este:
   1. nu este utila nici pentru metale nici pentru aliaje;
   2. o metoda cantitativa de analiza;
   3. prea veche pentru a fi utilizata īn prezent īn laborator;
   4. utila pentru metale pure, nu atāt de utila pentru aliaje;
   5. o metoda nedistructiva de analiza;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. useful for both metals and alloys;
   2. too ancient to be used today in the laboratory;
   3. a gravimetric method of analysis;
   4. a destructive method of analysis;
   
   
2. The paper requires before analysis of the sample:
   1. to be tested;
   2. to be burned;
   3. to be cut in small pieces;
   4. to measure its surface;
   
   
3. When the electrical circuit is closed:
   1. surface of the sample is fastly covered by a protecting shield of electrons;
   2. electric current avoids the sample and the paper;
   3. cations from the solution are passed into sample as metals;
   4. water dissociation is inhibited;
   
   
4. Why moisten the paper with solution of sodium nitrate?
   1. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   2. to have something to do in the laboratory;
   3. for stopping after a while the chemical reaction that takes place;
   4. for the paper to work as isolator;
   
   
5. When aluminum is identified:
   1. is identified as Al³⁺ cation;
   2. supplementary precautions should be taken, because the plates are made from aluminum too;
   3. the presence of other ions may produce a false positive outcome;
   4. there are many identification reactions possible;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. utila atāt pentru metale si aliaje;
   2. prea veche pentru a fi utilizata īn prezent īn laborator;
   3. o metoda gravimetrica de analiza;
   4. o metoda distructiva de analiza;
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa fie testata;
   2. sa fie arsa;
   3. sa fie taiata īn bucati mici;
   4. sa i se masoare suprafata;
   
   
3. Cānd circuitul electric este īnchis:
   1. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   2. curent electric evita proba si hārtia;
   3. cationii din solutie sunt trecuti īn proba ca metale;
   4. disocierea apei este inhibata;
   
   
4. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   2. pentru a avea ceva de a face īn laborator;
   3. pentru oprirea dupa un timp reactiei chimice care are loc;
   4. pentru ca hartia sa actioneze ca izolator;
   
   
5. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al³⁺;
   2. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   3. prezenta altor ioni poate produce un rezultat fals pozitiv;
   4. exista multe reactii posibile de identificare;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The following chemical reactions were used in the experiments:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. H₂O + CO₂ -> H₂CO₃
   
   
2. 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 use our phones;
   
   
3. A redox process:
   1. involves changing of the oxidation states of some participants to the reaction;
   2. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. involves changing of the aggregation states of some participants to the reaction;
   4. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
4. The density of the solutions depends on:
   1. provider;
   2. quantity;
   3. temperature;
   4. time elapsed since were prepared;
   
   
5. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the number of atoms for each element;
   2. the principle of the conservation of the volume;
   3. the liquid in the burette should be at the same level before and after conducting the experiment;
   4. all glassware should be clean before, after and during the experiment;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. H₂O + CO₂ -> H₂CO₃
   
   
2. 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 utilizam telefoanele;
   5. este necesara stabilirea coeficientilor reactiei chimice;
   
   
3. Un proces redox:
   1. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   2. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   4. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   5. apare numai atunci cānd se amesteca substante gresit īn laborator;
   
   
4. Densitatea solutiilor depinde de:
   1. furnizor;
   2. cantitate;
   3. temperatura;
   4. timpul scurs de cand au fost pregatite;
   
   
5. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii numarul de atomi pentru fiecare element;
   2. principiul conservarii volumului;
   3. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   4. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. In the calculations:
   1. are necessary to discuss with our colleagues;
   2. are necessary to draw the tables in our notebooks after completing of the experiment;
   3. are necessary to take some information from reagent bottles;
   4. are necessary to use some formulas expressing in different ways the concentration;
   
   
2. The following chemical reactions were used in the experiments:
   1. H₂O + CO₂ -> H₂CO₃
   2. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
3. A redox process:
   1. occurs only when we mix wrong substances in the laboratory;
   2. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. involves a transfer of electrons from one atom or group of atoms to another;
   4. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
4. Titration as a laboratory operation involves:
   1. a volume measurement;
   2. a sulphuric acid solution;
   3. a salt solution;
   4. a natrium hydroxide solution;
   
   
5. Reactions between acids and bases:
   1. are all exothermic, being therefore dangerous outside of the laboratory;
   2. have as a consequence the dissolution of a salt;
   3. always have as a consequence the formation of a quantity of water;
   4. are rarely useful, and even rarely used;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. In calcule:
   1. este necesar sa discutam cu colegii;
   2. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   3. este necesar a se lua unele informatii de pe sticlele de reactivi;
   4. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   
   
2. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂O + CO₂ -> H₂CO₃
   2. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
3. Un proces redox:
   1. apare numai atunci cānd se amesteca substante gresit īn laborator;
   2. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   4. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
4. Titrarea ca o operatiune de laborator implica:
   1. masurarea volumului;
   2. o solutie de acid sulfuric;
   3. o solutie de sare;
   4. o solutie de hidroxid de sodiu;
   
   
5. Reactiile īntre acizi si baze:
   1. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   2. au drept consecinta dizolvarea unei sari;
   3. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   4. sunt rareori utile, si chiar mai rar utilizate;
   5. au ca efect schimbarea culorii unei solutii;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The density of the solutions depends on:
   1. pressure;
   2. provider;
   3. concentration;
   4. temperature;
   
   
2. The indicator should be added:
   1. only in special cases, when the burette is graded from its bottom to its top;
   2. in large quantities, according to the principle 'only size matters';
   3. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   4. only at the suggestion of the supervisor;
   
   
3. A redox process:
   1. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. is always fast and safe;
   3. involves changing of the oxidation states of some participants to the reaction;
   4. involves a transfer of electrons from one atom or group of atoms to another;
   
   
4. In the calculations:
   1. are necessary to take the results imediatly after these are available from others;
   2. are necessary to use some formulas expressing in different ways the concentration;
   3. are necessary to draw the tables in our notebooks after completing of the experiment;
   4. are necessary to take some information from reagent bottles;
   
   
5. The following chemical reactions were used in the experiments:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Densitatea solutiilor depinde de:
   1. presiune;
   2. furnizor;
   3. concentratie;
   4. temperatura;
   5. cantitate;
   
   
2. Trebuie adaugat indicatorul:
   1. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   2. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   3. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   4. numai la sugestia supraveghetorului;
   
   
3. Un proces redox:
   1. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. este īntotdeauna rapid si sigur;
   3. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   4. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   5. apare numai atunci cānd se amesteca substante gresit īn laborator;
   
   
4. In calcule:
   1. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   2. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   3. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   4. este necesar a se lua unele informatii de pe sticlele de reactivi;
   5. este necesar sa utilizam telefoanele;
   
   
5. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   5. H₂O + CO₂ -> H₂CO₃
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. In the calculations:
   1. are necessary to establish the coefficients of the chemical reaction;
   2. are necessary to use our phones;
   3. are necessary to discuss with our colleagues;
   4. are necessary to take some information from reagent bottles;
   
   
2. 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. something rarely encountered in chemistry;
   4. the point in which a reactive should be added in the burette;
   
   
3. 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 volume;
   3. the principle of the conservation of the number of atoms for each element;
   4. the principle of the conservation of the energy;
   
   
4. Reactions between acids and bases:
   1. are rarely useful, and even rarely used;
   2. have as effect the change of the color of a solution;
   3. have as a consequence the dissolution of a salt;
   4. always have as a consequence the formation of a quantity of water;
   
   
5. Titration as a laboratory operation involves:
   1. a salt solution;
   2. a natrium hydroxide solution;
   3. a mass measurement;
   4. a volume measurement;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. In calcule:
   1. este necesara stabilirea coeficientilor reactiei chimice;
   2. este necesar sa utilizam telefoanele;
   3. este necesar sa discutam cu colegii;
   4. este necesar a se lua unele informatii de pe sticlele de reactivi;
   5. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   
   
2. 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. ceva rar īntālnit īn chimie;
   4. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   5. folosit pentru a echilibra ecuatia;
   
   
3. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   2. principiul conservarii volumului;
   3. principiul conservarii numarul de atomi pentru fiecare element;
   4. principiul conservarii energiei;
   
   
4. Reactiile īntre acizi si baze:
   1. sunt rareori utile, si chiar mai rar utilizate;
   2. au ca efect schimbarea culorii unei solutii;
   3. au drept consecinta dizolvarea unei sari;
   4. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   5. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   
   
5. Titrarea ca o operatiune de laborator implica:
   1. o solutie de sare;
   2. o solutie de hidroxid de sodiu;
   3. masurarea masei;
   4. masurarea volumului;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The equivalence point is:
   1. the point in which a reactive is fully consumed in the reaction;
   2. used to balance the equation;
   3. indicated when a color change is observed into the solution;
   4. the point in which a reactive should be added in the reaction flask;
   
   
2. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the volume;
   2. all glassware should be clean before and after conducting the experiment;
   3. the principle of the conservation of the number of atoms for each element;
   4. all glassware should be clean before, after and during the experiment;
   
   
3. The following chemical reactions were used in the experiments:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
4. The indicator should be added:
   1. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   2. to provide a color change at equivalence point;
   3. in small quantities, to avoid the errors in observations and in calculations;
   4. only at the suggestion of the supervisor;
   
   
5. In the calculations:
   1. are necessary to take some information from reagent bottles;
   2. are necessary to draw the tables in our notebooks after completing of the experiment;
   3. are necessary to take the results imediatly after these are available from others;
   4. are necessary to use some formulas expressing in different ways the concentration;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Punctul de echivalenta este:
   1. punctul īn care un reactiv este consumat complet īn reactie;
   2. folosit pentru a echilibra ecuatia;
   3. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   4. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   
   
2. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii volumului;
   2. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   3. principiul conservarii numarul de atomi pentru fiecare element;
   4. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   
   
3. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   5. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   
   
4. Trebuie adaugat indicatorul:
   1. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   2. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   3. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   4. numai la sugestia supraveghetorului;
   
   
5. In calcule:
   1. este necesar a se lua unele informatii de pe sticlele de reactivi;
   2. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   3. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   4. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. In the laboratory the water were:
   1. complexed by using EDTA titrimetric method;
   2. biologically purified using the resin column;
   3. softened using the resin column;
   4. alkalinized for drinking purposes;
   
   
2. EDTA is used:
   1. for recharging of the resin for water softening;
   2. as reagent for determining the hardness of the water;
   3. for complexing of Ca²⁺ and Mg²⁺ ions;
   4. for safety precautions purposes;
   
   
3. We may say the followings:
   1. water is pure only when is taken from a good freshwater mountain stream;
   2. water is good for drinking, it is nothing to be analysed;
   3. water is a good polar solvent;
   4. purification of the water may include chemical processes;
   
   
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 + Zn²⁺ -> Zn(OH)₂ + Na⁺
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
5. In the laboratory were analyzed:
   1. the softness of the water;
   2. the acidity of the water;
   3. the concentration of the water;
   4. the temperature of the water;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. In laborator apa au fost:
   1. complexata prin metoda titrimetrica EDTA;
   2. purificata biologic utilizānd coloana de rasina;
   3. dedurizata folosind coloana de rasina;
   4. alcalinizeaza pentru baut;
   
   
2. EDTA este utilizat:
   1. pentru reīncarcarea rasinii la dedurizarea apei;
   2. ca reactiv pentru determinarea duritatii apei;
   3. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   4. ca masura de siguranta;
   
   
3. Putem spune urmatoarele:
   1. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   2. apa este buna pentru consum, nu este nimic de a fi analizat;
   3. apa este un solvent polar bun;
   4. purificarea apei poate include procese chimice;
   
   
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 + Zn²⁺ -> Zn(OH)₂ + Na⁺
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
5. Īn laborator au fost analizate:
   1. moliciunea apei;
   2. aciditatea apei;
   3. concentratia apei;
   4. temperatura apei;
   5. duritatea apei;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. color;
   2. permanent alkalinity;
   3. total acidity;
   4. mineral acidity;
   
   
2. In the laboratory were analyzed:
   1. the color of the water;
   2. the boiling point of the water;
   3. the temperature of the water;
   4. the alkalinity of the water;
   
   
3. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. for safety precautions purposes;
   3. as reagent for determining the hardness of the water;
   4. for recharging of the resin for water softening;
   
   
4. We may say the followings:
   1. water is pure only when is taken from a good freshwater mountain stream;
   2. purification of the water may include labeling processes;
   3. natural water may contain organic matter and living organisms;
   4. purification of the water may include chemical processes;
   
   
5. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + HCOO^- -> HCOONa + HO^-
   2. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   3. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   4. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. culoare;
   2. alcalinitate permanenta;
   3. aciditate totala;
   4. aciditate minerala;
   5. puritate;
   
   
2. Īn laborator au fost analizate:
   1. culoarea apei;
   2. punctul de fierbere al apei;
   3. temperatura apei;
   4. alcalinitatea apei;
   
   
3. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. ca masura de siguranta;
   3. ca reactiv pentru determinarea duritatii apei;
   4. pentru reīncarcarea rasinii la dedurizarea apei;
   
   
4. Putem spune urmatoarele:
   1. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   2. purificarea apei poate include procesele de etichetare;
   3. apa naturala poate contine materie organica si organisme vii;
   4. purificarea apei poate include procese chimice;
   5. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + HCOO^- -> HCOONa + HO^-
   2. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   3. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   4. NaOH + CO₃^2- -> HCO₃^- + HO^-
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. total alkalinity;
   2. purity;
   3. total acidity;
   4. permanent alkalinity;
   
   
2. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + HCOO⁺ -> HCOONa + HO⁺
   2. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   3. NaOH + CH₃COO^- -> CH₃COONa + HO^-
   4. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   
   
3. EDTA is used:
   1. for recharging of the resin for water softening;
   2. for complexing of Ca²⁺ and Mg²⁺ ions;
   3. as reagent for determining the hardness of the water;
   4. for complexing of Na¹⁺ and K¹⁺ ions;
   
   
4. We may say the followings:
   1. purification of the water may include biological processes;
   2. water is pure only when is taken from a good freshwater mountain stream;
   3. water is good for drinking, it is nothing to be analysed;
   4. natural water may contain organic matter and living organisms;
   
   
5. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   2. HCl + HO⁺ -> H₂O + Cl⁺
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + HO^- -> H₂O + Cl^-
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. alcalinitate totala;
   2. puritate;
   3. aciditate totala;
   4. alcalinitate permanenta;
   5. duritate;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + HCOO⁺ -> HCOONa + HO⁺
   2. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   3. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   4. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   5. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   
   
3. EDTA este utilizat:
   1. pentru reīncarcarea rasinii la dedurizarea apei;
   2. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   3. ca reactiv pentru determinarea duritatii apei;
   4. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   5. ca masura de siguranta;
   
   
4. Putem spune urmatoarele:
   1. purificarea apei poate include procese biologice;
   2. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   3. apa este buna pentru consum, nu este nimic de a fi analizat;
   4. apa naturala poate contine materie organica si organisme vii;
   5. purificarea apei poate include procese chimice;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   2. HCl + HO⁺ -> H₂O + Cl⁺
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + HO^- -> H₂O + Cl^-
   
   

FINAL TEST AT LABORATORY
Water analysis

1. EDTA is used:
   1. for safety precautions purposes;
   2. for recharging of the resin for water softening;
   3. for indication of the equilibrium point in the reaction;
   4. as reagent for determining the hardness of the water;
   
   
2. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   3. NaOH + NO₃^- -> NaNO₃ + HO^-
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
3. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CH₃COO^- -> CH₃COONa + HO^-
   2. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + HCOO^- -> HCOONa + HO^-
   
   
4. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   2. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   3. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   4. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   
   
5. In the laboratory were analyzed:
   1. the solubility of the water;
   2. the temperature of the water;
   3. the alkalinity of the water;
   4. the color of the water;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. EDTA este utilizat:
   1. ca masura de siguranta;
   2. pentru reīncarcarea rasinii la dedurizarea apei;
   3. pentru indicarea punctului de echilibru īn reactie;
   4. ca reactiv pentru determinarea duritatii apei;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   3. NaOH + NO₃^- -> NaNO₃ + HO^-
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   2. NaOH + CO₃^2- -> HCO₃^- + HO^-
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + HCOO^- -> HCOONa + HO^-
   5. NaOH + HCOO⁺ -> HCOONa + HO⁺
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   2. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   3. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   4. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   
   
5. Īn laborator au fost analizate:
   1. solubilitatea apei;
   2. temperatura apei;
   3. alcalinitatea apei;
   4. culoarea apei;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. EDTA is used:
   1. as reagent for determining the hardness of the water;
   2. for complexing of Na¹⁺ and K¹⁺ ions;
   3. for recharging of the resin for water softening;
   4. for safety precautions purposes;
   
   
2. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   
   
3. In the laboratory were analyzed:
   1. the concentration of the water;
   2. the temperature of the water;
   3. the softness of the water;
   4. the acidity of the water;
   
   
4. In the laboratory the water were:
   1. softened using the resin column;
   2. acidified for drinking purposes;
   3. hardened using the resin column;
   4. complexed by using EDTA titrimetric method;
   
   
5. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   2. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   3. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. EDTA este utilizat:
   1. ca reactiv pentru determinarea duritatii apei;
   2. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   3. pentru reīncarcarea rasinii la dedurizarea apei;
   4. ca masura de siguranta;
   5. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   5. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   
   
3. Īn laborator au fost analizate:
   1. concentratia apei;
   2. temperatura apei;
   3. moliciunea apei;
   4. aciditatea apei;
   
   
4. In laborator apa au fost:
   1. dedurizata folosind coloana de rasina;
   2. acidulata pentru baut;
   3. calita folosind coloana de rasina;
   4. complexata prin metoda titrimetrica EDTA;
   5. alcalinizeaza pentru baut;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   2. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   3. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   5. HCl + HO^- -> H₂O + Cl^-
   
   

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

1. The aluminum plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was involved in the gravimetric method of corrosion analysis
   3. was corroded in sodium hydroxide solution;
   4. the volume is measured before and after immersing it in NaOH;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. Ni(CO)₄ -> Ni + CO
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
3. Corrosion of metals:
   1. can be reduced by electroplating;
   2. may provide useful raw materials for analysis;
   3. can be reduced by passivation;
   4. is the destruction of metals under the action of external factors;
   
   
4. In studied corrosion processes:
   1. a gas is released at both corrosion of zinc and aluminum;
   2. the metal it changes its oxidation state becoming an cation;
   3. always the metal changes its oxidation state;
   4. when a gas is released its volume depends on the amount of metal corroded;
   
   
5. The zinc plate:
   1. the mass is measured before and after immersing it in H₂SO₄;
   2. was involved in the volumetric method of corrosion analysis
   3. was corroded in sulfuric solution;
   4. the surface is measured before and after immersing it in H₂SO₄;
   
   

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

1. Pentru placa de aluminiu:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. a fost corodata īn solutie de hidroxid de sodiu;
   4. volumul se masoara īnainte si dupa imersia īn NaOH;
   5. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. Ni(CO)₄ -> Ni + CO
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. Al₂O₃ + NaOH -> NaAlO₂
   5. ZnO + CO -> Zn + CO₂
   
   
3. Coroziunea metalelor:
   1. poate fi redusa prin galvanizare;
   2. poate furniza materii prime utile pentru analiza;
   3. poate fi redusa prin pasivare;
   4. este distrugerea metalelor sub actiunea factorilor externi;
   
   
4. Īn procesele de coroziune studiate:
   1. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   2. metalul isi schimba starea de oxidare pentru a deveni un cation;
   3. īntotdeauna metalul isi schimba starea de oxidare;
   4. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   
   
5. Pentru placa de zinc:
   1. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. a fost corodata īn solutie sulfuric;
   4. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   
   

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

1. In studied corrosion processes:
   1. a gas is released only the corrosion of zinc;
   2. a gas is released only the corrosion of aluminum;
   3. always the metal changes its oxidation state;
   4. the metal it changes its oxidation state becoming an cation;
   
   
2. The zinc plate:
   1. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   2. was degreased in sulfuric acid solution;
   3. was corroded in sulfuric solution;
   4. the surface is measured before and after immersing it in H₂SO₄;
   
   
3. The aluminum plate:
   1. was involved in the gravimetric method of corrosion analysis
   2. the surface is measured before and after immersing it in NaOH;
   3. was involved in the volumetric method of corrosion analysis
   4. was degreased in sodium hydroxide solution;
   
   
4. Which of the following reactions may be called as of corrosion:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. H⁺ + Ni -> H₂ + Ni²⁺
   
   
5. Corrosion of metals:
   1. is helping in the process of cleaning the metals surfaces;
   2. can be reduced by electroplating;
   3. may provide useful raw materials for analysis;
   4. is the protection in time to chemical agents;
   
   

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

1. Īn procesele de coroziune studiate:
   1. un gaz este eliberat numai la corodarea zincului;
   2. un gaz este eliberat numai la corodarea aluminiului;
   3. īntotdeauna metalul isi schimba starea de oxidare;
   4. metalul isi schimba starea de oxidare pentru a deveni un cation;
   5. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   
   
2. Pentru placa de zinc:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. a fost degresata īn solutie de acid sulfuric;
   3. a fost corodata īn solutie sulfuric;
   4. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   5. a fost implicata īn metoda volumetrica de analiza a coroziunii
   
   
3. Pentru placa de aluminiu:
   1. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   2. suprafata se masoara īnainte si dupa imersia īn NaOH;
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. a fost degresata īn solutie de hidroxid de sodiu;
   5. a fost corodata īn solutie de hidroxid de sodiu;
   
   
4. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. H⁺ + Ni -> H₂ + Ni²⁺
   5. ZnO + CO -> Zn + CO₂
   
   
5. Coroziunea metalelor:
   1. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   2. poate fi redusa prin galvanizare;
   3. poate furniza materii prime utile pentru analiza;
   4. este protectia de durata impotriva agentilor chimici;
   
   

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

1. Which of the following reactions may be called as of corrosion:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. Ni(CO)₄ -> Ni + CO
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. H⁺ + Zn -> H₂ + Zn²⁺
   
   
2. Corrosion of metals:
   1. can be reduced by passivation;
   2. takes place merely from exposure to moisture in air;
   3. is a beneficial process that shows the stability of metals;
   4. is the protection in time to chemical agents;
   
   
3. The aluminum plate:
   1. was corroded in sodium hydroxide solution;
   2. the surface is measured before and after immersing it in NaOH;
   3. was involved in the gravimetric method of corrosion analysis
   4. the mass is measured before and after immersing it in NaOH;
   
   
4. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an cation;
   2. the metal it changes its oxidation state becoming an anion;
   3. a gas is released only the corrosion of zinc;
   4. a gas is released only the corrosion of aluminum;
   
   
5. The zinc plate:
   1. was corroded in sulfuric solution;
   2. the volume is measured before and after immersing it in H₂SO₄;
   3. the surface is measured before and after immersing it in H₂SO₄;
   4. was involved in the gravimetric method of corrosion analysis
   
   

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

1. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. Ni(CO)₄ -> Ni + CO
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. H⁺ + Zn -> H₂ + Zn²⁺
   5. H⁺ + Fe -> H₂ + Fe²⁺
   
   
2. Coroziunea metalelor:
   1. poate fi redusa prin pasivare;
   2. are loc pur si simplu prin expunerea la umiditate īn aer;
   3. este un proces benefic care arata stabilitatea metalelor;
   4. este protectia de durata impotriva agentilor chimici;
   5. poate fi redusa prin galvanizare;
   
   
3. Pentru placa de aluminiu:
   1. a fost corodata īn solutie de hidroxid de sodiu;
   2. suprafata se masoara īnainte si dupa imersia īn NaOH;
   3. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   4. masa este masurata īnainte si dupa imersia īn NaOH;
   
   
4. Īn procesele de coroziune studiate:
   1. metalul isi schimba starea de oxidare pentru a deveni un cation;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. un gaz este eliberat numai la corodarea zincului;
   4. un gaz este eliberat numai la corodarea aluminiului;
   
   
5. Pentru placa de zinc:
   1. a fost corodata īn solutie sulfuric;
   2. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   3. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   5. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   
   

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

1. 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;
   
   
2. The aluminum plate:
   1. the volume is measured before and after immersing it in NaOH;
   2. the surface is measured before and after immersing it in NaOH;
   3. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   4. was involved in the gravimetric method of corrosion analysis
   
   
3. In studied corrosion processes:
   1. a gas is released at both corrosion of zinc and aluminum;
   2. always the metal changes its oxidation state;
   3. the metal it changes its oxidation state becoming an anion;
   4. the metal it changes its oxidation state becoming an cation;
   
   
4. Which of the following reactions may be called as of corrosion:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   4. H⁺ + Ni -> H₂ + Ni²⁺
   
   
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 involved in the gravimetric 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;
   
   

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

1. 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;
   
   
2. Pentru placa de aluminiu:
   1. volumul se masoara īnainte si dupa imersia īn NaOH;
   2. suprafata se masoara īnainte si dupa imersia īn NaOH;
   3. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   5. a fost corodata īn solutie de hidroxid de sodiu;
   
   
3. Īn procesele de coroziune studiate:
   1. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   2. īntotdeauna metalul isi schimba starea de oxidare;
   3. metalul isi schimba starea de oxidare pentru a deveni un anion;
   4. metalul isi schimba starea de oxidare pentru a deveni un cation;
   
   
4. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   4. H⁺ + Ni -> H₂ + Ni²⁺
   
   
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 implicata īn metoda gravimetrica de analiza a coroziunii
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   5. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   
   

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

1. The zinc plate:
   1. the surface is measured before and after immersing it in H₂SO₄;
   2. was involved in the gravimetric method of corrosion analysis
   3. was involved in the volumetric method of corrosion analysis
   4. the volume is measured before and after immersing it in H₂SO₄;
   
   
2. The aluminum plate:
   1. was involved in the volumetric method of corrosion analysis
   2. the volume is measured before and after immersing it in NaOH;
   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 NaOH;
   
   
3. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an anion;
   2. always the metal changes its oxidation state;
   3. the metal it changes its oxidation state becoming an cation;
   4. a gas is released at both corrosion of zinc and aluminum;
   
   
4. Which of the following reactions may be called as of corrosion:
   1. Ni(CO)₄ -> Ni + CO
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. H⁺ + Fe -> H₂ + Fe²⁺
   
   
5. Corrosion of metals:
   1. is the protection in time to chemical agents;
   2. is helping in the process of cleaning the metals surfaces;
   3. may provide useful raw materials for analysis;
   4. 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. suprafata se masoara 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. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   5. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   
   
2. Pentru placa de aluminiu:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. volumul se masoara īnainte si dupa imersia īn NaOH;
   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 NaOH;
   
   
3. Īn procesele de coroziune studiate:
   1. metalul isi schimba starea de oxidare pentru a deveni un anion;
   2. īntotdeauna metalul isi schimba starea de oxidare;
   3. metalul isi schimba starea de oxidare pentru a deveni un cation;
   4. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   5. un gaz este eliberat numai la corodarea zincului;
   
   
4. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. Ni(CO)₄ -> Ni + CO
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. H⁺ + Fe -> H₂ + Fe²⁺
   
   
5. Coroziunea metalelor:
   1. este protectia de durata impotriva agentilor chimici;
   2. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   3. poate furniza materii prime utile pentru analiza;
   4. este distrugerea metalelor sub actiunea factorilor externi;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. The intensity of the current:
   1. affect only the quality of the nickel deposition;
   2. affect only the quantity of the nickel deposition;
   3. is to be calculated after conducting the experiment;
   4. is to be calculated before to start the experiment;
   
   
2. Theoretical mass of nickel deposited is calculated using:
   1. the conservation of the energy law;
   2. law of mass action;
   3. solutions laws;
   4. the electrolysis law;
   
   
3. It is expected to have a mass of nickel deposited:
   1. inversely proportional with the intensity of the current used;
   2. proportional with the surface of the sample;
   3. proportional with the intensity of the current used;
   4. inversely proportional with the surface of the sample;
   
   
4. 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 anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   3. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   4. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the cathode: O^2- - 2e^- -> O₂⁰
   
   
5. Electrical conductivity of nickel salts solutions:
   1. is improved by salts additions;
   2. is relatively small;
   3. is relatively high;
   4. depends on the intensity of the current used;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Intensitatea curentului:
   1. afecteaza numai calitatea depunerii nichelului;
   2. afecteaza numai cantitatea de nichel depus;
   3. se calculeaza dupa efectuarea experimentului;
   4. trebuie sa fie calculata īnainte de a īncepe experimentul;
   
   
2. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea conservarii energiei;
   2. legea actiunii maselor;
   3. legea solutilor;
   4. legea electrolizei;
   5. legea gazelor perfecte;
   
   
3. Este de asteptat ca masa de nichel depus sa fie:
   1. invers proportionala cu intensitatea curentului utilizat;
   2. proportionala cu suprafata probei;
   3. proportionala cu intensitatea curentului utilizat;
   4. invers proportionala cu suprafata probei;
   
   
4. 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 anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   3. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   4. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la catod: O^2- - 2e^- -> O₂⁰
   
   
5. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este īmbunatatita prin adaosuri de saruri;
   2. este relativ mica;
   3. este relativ mare;
   4. depinde de intensitatea curentului utilizat;
   5. este redusa prin adaosuri de saruri;