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

1. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same energy;
   2. are considered to be at the same temperature, but may have different speeds;
   3. all have same speed;
   4. all are moving in an arbitrary direction;
   
   
2. The position of the ring in the experiment is dependent on:
   1. the propagation of the species as neutral molecules and not as ions;
   2. the real speeds and not the virtual speeds of each involved species;
   3. the propagation of the species as ions and not as neutral molecules;
   4. the length of the tube and the width of the tube;
   
   
3. The chronometer is used in the experiment for:
   1. measuring of the diffusion time;
   2. to keep us busy;
   3. extracting the information necessary to calculate the speeds ratio;
   4. extracting the information necessary to calculate the diffusion coefficients;
   
   
4. At the ends of the tube following equilibrium reactions occurs:
   1. H₂O \=\ H⁺ + HO^-
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   4. H⁺ + HO^- \=\ H₂O
   
   
5. 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. formation of ammonium chloride;
   4. unproper illumination in the laboratory and our breathing;
   
   

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

1. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate au aceeasi energie;
   2. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   3. toate au aceeasi viteza;
   4. toate se īndreapta īntr-o directie arbitrara;
   5. toate se deplaseaza īn aceeasi directie;
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   2. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   3. propagarea speciilor ca ionii si nu ca si molecule neutre;
   4. lungimea tubului si latimea tubului;
   5. latimea tubului si nu lungimea tubului;
   
   
3. Cronometrul este utilizat īn experimentul pentru:
   1. masurarea timpului de difuzie;
   2. sa ne tina ocupati;
   3. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   4. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   5. sincronizarea timpilor de difuzie;
   
   
4. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H₂O \=\ H⁺ + HO^-
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   4. H⁺ + HO^- \=\ H₂O
   
   
5. 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. formarea clorurii de amoniu;
   4. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   5. prezentei clorului;
   
   

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

1. The fog observed during the experiment is due to:
   1. formation of ammonium chloride;
   2. our experiment designed to trap the product of the reaction;
   3. unproper illumination in the laboratory or our breathing;
   4. unproper illumination in the laboratory and our breathing;
   
   
2. We may say the followings:
   1. the kinetic energy of a molecule is affected by temperature only;
   2. diffusion process appears in all gaseous, liquid and solid states;
   3. the molecules have energy only in gaseous and liquid states;
   4. the kinetic energy of a molecule is affected by temperature and pressure;
   
   
3. The chronometer is used in the experiment for:
   1. indication of the moment when we should pay attention to the experiment;
   2. extracting the information necessary to calculate the diffusion coefficients;
   3. to keep us busy;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
4. 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 real speeds and not the virtual speeds of each involved species;
   3. the average energy or average speed of each involved species;
   4. the speed of diffusion of each involved species;
   
   
5. At the ends of the tube following equilibrium reactions occurs:
   1. HCl + H₂O \=\ Cl^- + H₃O⁺
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + HCl \=\ NH₄Cl
   4. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   

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

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

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. diffusion process appears only in gaseous and liquid states;
   3. the molecules have energy in all gaseous, liquid and solid states;
   4. the molecules have energy only in gaseous state;
   
   
2. 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 length of the tube and the width of the tube;
   3. the propagation of the species as neutral molecules and not as ions;
   4. the average energy or average speed of each involved species;
   
   
3. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. H⁺ + HO^- \=\ H₂O
   4. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
4. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all are moving in the same direction;
   2. all are moving in an arbitrary direction;
   3. all have same speed;
   4. all have same energy;
   
   
5. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the diffusion coefficients;
   2. measuring of the diffusion time;
   3. synchronization of the diffusion times;
   4. extracting the information necessary to calculate the speeds ratio;
   
   

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. proces de difuzie apare numai īn stare gazoasa si lichida;
   3. moleculele au energie īn toate starile gazoasa, lichida si solida;
   4. moleculele au energie numai īn stare gazoasa;
   5. moleculele au viteze numai īn stare gazoasa;
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   2. lungimea tubului si latimea tubului;
   3. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   4. energia medie sau viteza medie a fiecarei specii implicate;
   5. latimea tubului si nu lungimea tubului;
   
   
3. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. H⁺ + HO^- \=\ H₂O
   4. NH₄⁺ + Cl^- \=\ NH₄Cl
   5. NH₃ + HCl \=\ NH₄Cl
   
   
4. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate se deplaseaza īn aceeasi directie;
   2. toate se īndreapta īntr-o directie arbitrara;
   3. toate au aceeasi viteza;
   4. toate au aceeasi energie;
   
   
5. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   2. masurarea timpului de difuzie;
   3. sincronizarea timpilor de difuzie;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   
   

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 are moving in an arbitrary direction;
   3. all have same energy;
   4. all are moving in the same direction;
   
   
2. At the ends of the tube following equilibrium reactions occurs:
   1. H₂O \=\ H⁺ + HO^-
   2. NH₄⁺ + Cl^- \=\ NH₄Cl
   3. NH₃ + HCl \=\ NH₄Cl
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
3. The position of the ring in the experiment is dependent on:
   1. the mode energy or mode speed of each involved species;
   2. the average energy or average speed of each involved species;
   3. the virtual speeds and not the real speeds of each involved species;
   4. the length of the tube and not of the width of the tube;
   
   
4. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the speeds ratio;
   2. extracting the information necessary to calculate the diffusion coefficients;
   3. measuring of the diffusion time;
   4. to keep us busy;
   
   
5. The fog observed during the experiment is due to:
   1. presence of the ammonia;
   2. formation of ammonium chloride;
   3. our experiment designed to trap the product of the reaction;
   4. presence of the chlorine;
   
   

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 se īndreapta īntr-o directie arbitrara;
   3. toate au aceeasi energie;
   4. toate se deplaseaza īn aceeasi directie;
   5. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   
   
2. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H₂O \=\ H⁺ + HO^-
   2. NH₄⁺ + Cl^- \=\ NH₄Cl
   3. NH₃ + HCl \=\ NH₄Cl
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
3. Pozitia inelului īn experimentul este dependenta de:
   1. viteza la moda sau energia la moda a fiecarei specii implicate;
   2. energia medie sau viteza medie a fiecarei specii implicate;
   3. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   4. lungimea tubului si nu latimea tubului;
   
   
4. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   2. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   3. masurarea timpului de difuzie;
   4. sa ne tina ocupati;
   
   
5. Ceata observata īn timpul experimentului se datoreaza:
   1. prezentei amoniacului;
   2. formarea clorurii de amoniu;
   3. experimentului nostru proiectat pentru a captura produsul de reactie;
   4. prezentei clorului;
   5. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   
   

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

1. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same speed;
   2. are considered to be at the same temperature, but may have different energies;
   3. all are moving in an arbitrary direction;
   4. all have same energy;
   
   
2. 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 speeds only in gaseous and liquid states;
   3. the molecules have speeds in all gaseous, liquid and solid states;
   4. the kinetic energy of a molecule is affected by temperature only;
   
   
3. 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. synchronization of the diffusion times;
   4. measuring of the diffusion time;
   
   
4. The fog observed during the experiment is due to:
   1. our experiment designed to trap the product of the reaction;
   2. unproper illumination in the laboratory and our breathing;
   3. presence of the chlorine;
   4. formation of ammonium chloride;
   
   
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 length of the tube and not of the width of the tube;
   4. the average energy or average speed of each involved species;
   
   

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

1. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate au aceeasi viteza;
   2. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   3. toate se īndreapta īntr-o directie arbitrara;
   4. toate au aceeasi energie;
   5. toate se deplaseaza īn aceeasi directie;
   
   
2. 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 viteze numai īn stare gazoasa si lichida;
   3. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   4. energia cinetica a unei molecule este afectata de numai temperatura;
   
   
3. 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. sincronizarea timpilor de difuzie;
   4. masurarea timpului de difuzie;
   5. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   
   
4. Ceata observata īn timpul experimentului se datoreaza:
   1. experimentului nostru proiectat pentru a captura produsul de reactie;
   2. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   3. prezentei clorului;
   4. formarea clorurii de amoniu;
   5. prezentei amoniacului;
   
   
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. lungimea tubului si nu latimea tubului;
   4. energia medie sau viteza medie a fiecarei specii implicate;
   
   

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. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. H₂O₂ -> H₂O + O₂;
   
   
2. A state equation for a real gas is:
   1. a relation obtained after conducting of the experiment;
   2. usable in the laboratory, but is not to be used somewhere else;
   3. a relation which may involve some constants dependent of gas composition;
   4. a relation which takes into account certain deviations from the ideal model;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. the ideal model of a gas approximated the best the behavior of the released gas;
   2. oxigen were released as result of the decomposition;
   3. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   4. ozone were released as result of the decomposition;
   
   
4. For gaseous state:
   1. the pressure is exactly the same as in liquid state;
   2. the pressure is unchanged when a chemical reaction occurs;
   3. the pressure is subject to change when a chemical reaction occurs;
   4. it exists an equation for all, p · V = n · R · T;
   
   
5. In the laboratory were studied:
   1. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   2. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   3. increasing of the temperature of a solid mass when was heated;
   4. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   
   

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. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. H₂O₂ -> H₂O + O₂;
   
   
2. O ecuatie de stare pentru un gaz real este:
   1. o relatie obtinut dupa efectuarea experimentului;
   2. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   3. o relatie care poate implica unele constante dependente de compozitia gazului;
   4. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   5. o relatie īntre un anumit numar de parametri de stare;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   2. oxigenul au fost eliberat ca urmare a descompunerii;
   3. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. ozonul au fost eliberat ca urmare a descompunerii;
   5. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   
   
4. Pentru stare gazoasa:
   1. presiunea este exact la fel ca si īn stare lichida;
   2. presiunea este neschimbata cānd apare o reactie chimica;
   3. presiunea se pot modifica atunci cānd apare o reactie chimica;
   4. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   5. presiunea depinde de modelul care este utilizat pentru o aproxima;
   
   
5. Īn laborator s-au studiat:
   1. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   2. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   5. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   
   

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

1. In the laboratory were studied:
   1. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   2. increasing of the temperature of a solid mass when was heated;
   3. the lost of the mass of a solid as result of producing of some gas;
   4. increasing of the pressure of a gas when was heated;
   
   
2. The values taken from the experiment conducted in the laboratory indicated that:
   1. air were released as result of the decomposition;
   2. we possess enough information to decide what gas was released from the reaction;
   3. the ideal model of a gas approximated the worst the behavior of the released gas;
   4. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   
   
3. For gaseous state:
   1. the pressure is approximately the same as in liquid state;
   2. the pressure is unchanged when a chemical reaction occurs;
   3. the pressure is subject to change when a chemical reaction occurs;
   4. the pressure is exactly the same as in liquid state;
   
   
4. A state equation for a real gas is:
   1. a relation obtained after conducting of the experiment;
   2. a relation derived to approximate the relation between state parameters;
   3. a relation which may involve some constants dependent of gas composition;
   4. a relation which takes into account certain deviations from the ideal model;
   
   
5. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   2. KClO₃ -> KCl + O₂;
   3. KNO₃ -> KNO₂ + O₂;
   4. KNO₂ + O₂ -> KNO₃;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   2. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   3. pierdut din masa de solid ca urmare a producerii unor gaze;
   4. cresterea presiunii unui gaz cānd s-a īncalzit;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. aer a fost eliberat ca urmare a descompunerii;
   2. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   4. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   5. ozonul au fost eliberat ca urmare a descompunerii;
   
   
3. Pentru stare gazoasa:
   1. presiunea este aproximativ aceeasi ca si īn stare lichida;
   2. presiunea este neschimbata cānd apare o reactie chimica;
   3. presiunea se pot modifica atunci cānd apare o reactie chimica;
   4. presiunea este exact la fel ca si īn stare lichida;
   5. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   
   
4. O ecuatie de stare pentru un gaz real este:
   1. o relatie obtinut dupa efectuarea experimentului;
   2. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   3. o relatie care poate implica unele constante dependente de compozitia gazului;
   4. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   5. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   
   
5. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   2. KClO₃ -> KCl + O₂;
   3. KNO₃ -> KNO₂ + O₂;
   4. KNO₂ + O₂ -> KNO₃;
   5. distilarea aerului lichid;
   
   

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

1. For gaseous state:
   1. the pressure depends on the model which are used to approximate it;
   2. we need to take supplementary precautions in the laboratory;
   3. the pressure is exactly the same as in liquid state;
   4. the pressure is much higher than in liquid state;
   
   
2. 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 may involve some constants dependent of gas composition;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KNO₂ + O₂ -> KNO₃;
   2. H₂O₂ -> H₂O + O₂;
   3. H₂O + O₂ -> H₂O₂;
   4. KCl + O₂ -> KClO₃;
   
   
4. In the laboratory were studied:
   1. increasing of the temperature of a solid mass when was heated;
   2. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   3. increasing of the pressure of a gas when was heated;
   4. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   
   
5. The values taken from the experiment conducted in the laboratory indicated that:
   1. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   2. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   3. oxigen were released as result of the decomposition;
   4. we possess enough information to decide what gas was released from the reaction;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pentru stare gazoasa:
   1. presiunea depinde de modelul care este utilizat pentru o aproxima;
   2. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   3. presiunea este exact la fel ca si īn stare lichida;
   4. presiunea este mult mai mare decāt īn stare lichida;
   
   
2. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un anumit numar de parametri de stare;
   2. o relatie care 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 poate implica unele constante dependente de compozitia gazului;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KNO₂ + O₂ -> KNO₃;
   2. H₂O₂ -> H₂O + O₂;
   3. H₂O + O₂ -> H₂O₂;
   4. KCl + O₂ -> KClO₃;
   5. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
4. Īn laborator s-au studiat:
   1. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   2. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   3. cresterea presiunii unui gaz cānd s-a īncalzit;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   5. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   
   
5. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   2. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. oxigenul au fost eliberat ca urmare a descompunerii;
   4. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   5. ozonul au fost eliberat ca urmare a descompunerii;
   
   

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

1. The values taken from the experiment conducted in the laboratory indicated that:
   1. we possess enough information to decide what gas was released from the reaction;
   2. the ideal model of a gas approximated the worst the behavior of the released gas;
   3. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   4. air were released as result of the decomposition;
   
   
2. In the laboratory were studied:
   1. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   2. the lost of the mass of a solid as result of producing of some gas;
   3. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   4. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   
   
3. A state equation for a real gas is:
   1. a relation which takes into account certain deviations from the ideal model;
   2. a relation which is always true, independent of the values of the state parameters;
   3. a relation which may involve some constants dependent of gas composition;
   4. a relation between an certain number of state parameters;
   
   
4. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. Ag + O₂ -> Ag₂O;
   2. opening a bubble water bottle;
   3. KNO₂ + O₂ -> KNO₃;
   4. H₂O₂ -> H₂O + O₂;
   
   
5. For gaseous state:
   1. it exists an equation for all, p · V = n · R · T;
   2. the pressure is approximately the same as in liquid state;
   3. the pressure is unchanged when a chemical reaction occurs;
   4. the pressure depends on the model which are used to approximate it;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   2. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   3. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. aer a fost eliberat ca urmare a descompunerii;
   5. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
2. Īn laborator s-au studiat:
   1. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   2. pierdut din masa de solid ca urmare a producerii unor gaze;
   3. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   
   
3. O ecuatie de stare pentru un gaz real este:
   1. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   2. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   3. o relatie care poate implica unele constante dependente de compozitia gazului;
   4. o relatie īntre un anumit numar de parametri de stare;
   5. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. Ag + O₂ -> Ag₂O;
   2. deschiderea unei sticle de apa cu bule;
   3. KNO₂ + O₂ -> KNO₃;
   4. H₂O₂ -> H₂O + O₂;
   
   
5. Pentru stare gazoasa:
   1. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   2. presiunea este aproximativ aceeasi ca si īn stare lichida;
   3. presiunea este neschimbata cānd apare o reactie chimica;
   4. presiunea depinde de modelul care este utilizat pentru o aproxima;
   5. presiunea este exact la fel ca si īn stare lichida;
   
   

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

1. In the laboratory were studied:
   1. the lost of the mass of a solid as result of producing of some gas;
   2. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   3. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   4. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   
   
2. A state equation for a real gas is:
   1. a relation between an unlimited number of state parameters;
   2. a relation which is always true, independent of the values of the state parameters;
   3. a relation which takes into account certain deviations from the ideal model;
   4. a relation between an certain number of state parameters;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. we do not possess enough information to decide what gas was released from the reaction;
   2. air were released as result of the decomposition;
   3. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   4. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   
   
4. For gaseous state:
   1. we need to take supplementary precautions in the laboratory;
   2. the pressure depends on the model which are used to approximate it;
   3. the pressure is approximately the same as in liquid state;
   4. the pressure is much higher than in liquid state;
   
   
5. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. opening a bubble water bottle;
   2. KNO₂ + O₂ -> KNO₃;
   3. Ag₂O -> Ag + O₂;
   4. H₂O + O₂ -> H₂O₂;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. pierdut din masa de solid ca urmare a producerii unor gaze;
   2. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   3. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   5. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   
   
2. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un numar nelimitat de parametri de stare;
   2. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   3. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   4. o relatie īntre un anumit numar de parametri de stare;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   2. aer a fost eliberat ca urmare a descompunerii;
   3. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   
   
4. Pentru stare gazoasa:
   1. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   2. presiunea depinde de modelul care este utilizat pentru o aproxima;
   3. presiunea este aproximativ aceeasi ca si īn stare lichida;
   4. presiunea este mult mai mare decāt īn stare lichida;
   
   
5. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. deschiderea unei sticle de apa cu bule;
   2. KNO₂ + O₂ -> KNO₃;
   3. Ag₂O -> Ag + O₂;
   4. H₂O + O₂ -> H₂O₂;
   5. KNO₃ -> KNO₂ + O₂;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   2. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
2. Why moisten the paper with solution of sodium nitrate?
   1. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   2. for the paper to work as isolator;
   3. to be cut easily with scissors;
   4. for stopping after a while the chemical reaction that takes place;
   
   
3. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as cations;
   2. cations from the solution are passed into sample as metals;
   3. elements from the solution are passed into sample as metals;
   4. electric current passes the sample and the paper;
   
   
4. When lead is identified:
   1. a red-brown complex appears;
   2. the reactions used clearly indicates its presence;
   3. a violet complex appears;
   4. a heat release is observed;
   
   
5. When aluminum is identified:
   1. is identified as Al¹⁺ cation;
   2. the presence of other ions may produce a true negative outcome;
   3. is identified as Al²⁺ cation;
   4. using of alizarin along with ammonium hidroxide provide a red colored complex;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   2. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
2. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   2. pentru ca hartia sa actioneze ca izolator;
   3. sa fie taiat cu usurinta cu foarfeca;
   4. pentru oprirea dupa un timp reactiei chimice care are loc;
   
   
3. Cānd circuitul electric este īnchis:
   1. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   2. cationii din solutie sunt trecuti īn proba ca metale;
   3. elemente din solutie sunt trecute īn proba ca metale;
   4. curent electric trece prin proba si hārtie;
   
   
4. Cānd plumbul este identificat:
   1. apare un complex rosu-brun;
   2. reactiile utilizate īn mod clar ii indica prezenta;
   3. apare un complex violet;
   4. se observa o eliberare de caldura;
   5. apare un complex albastru;
   
   
5. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al¹⁺;
   2. prezenta altor ioni poate produce un rezultat adevarat negativ;
   3. este identificat ca cationul Al²⁺;
   4. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The paper requires before analysis of the sample:
   1. to be burned;
   2. to be cut in small pieces;
   3. to be weighted;
   4. to be tested;
   
   
2. Why moisten the paper with solution of sodium nitrate?
   1. for stopping after a while the chemical reaction that takes place;
   2. to accomodate ourselves to use chemicals;
   3. to have something to do in the laboratory;
   4. to be cut easily with scissors;
   
   
3. When lead is identified:
   1. a yellow complex appears;
   2. a violet complex appears;
   3. interference of other ions may affect the outcome;
   4. a heat release is observed;
   
   
4. When aluminum is identified:
   1. is identified as Al³⁺ cation;
   2. is identified as Al²⁺ cation;
   3. supplementary precautions should be taken, because the plates are made from aluminum too;
   4. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   
   
5. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa fie taiata īn bucati mici;
   3. sa fie cantarita;
   4. sa fie testata;
   5. sa fie uscata;
   
   
2. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru oprirea dupa un timp reactiei chimice care are loc;
   2. sa ne acomodam in a utiliza substante chimice;
   3. pentru a avea ceva de a face īn laborator;
   4. sa fie taiat cu usurinta cu foarfeca;
   5. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   
   
3. Cānd plumbul este identificat:
   1. apare un complex galben;
   2. apare un complex violet;
   3. interferenta altor ioni poate afecta rezultatul;
   4. se observa o eliberare de caldura;
   
   
4. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al³⁺;
   2. este identificat ca cationul Al²⁺;
   3. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   4. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   
   
5. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
2. Why moisten the paper with solution of sodium nitrate?
   1. for stopping after a while the chemical reaction that takes place;
   2. to provide cations for analysis;
   3. for the paper to work as isolator;
   4. to have something to do in the laboratory;
   
   
3. The paper requires before analysis of the sample:
   1. to be burned;
   2. to be moistened with an electrolyte;
   3. to measure its surface;
   4. to be tested;
   
   
4. When lead is identified:
   1. a violet complex appears;
   2. a yellow complex appears;
   3. interference of other ions may affect the outcome;
   4. dangerous substances are used;
   
   
5. When aluminum is identified:
   1. is identified as Al¹⁺ cation;
   2. is identified as Al³⁺ cation;
   3. the presence of other ions may produce a false negative outcome;
   4. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
2. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru oprirea dupa un timp reactiei chimice care are loc;
   2. pentru furniza cationi pentru analiza;
   3. pentru ca hartia sa actioneze ca izolator;
   4. pentru a avea ceva de a face īn laborator;
   5. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   
   
3. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa fie umezita cu un electrolit;
   3. sa i se masoare suprafata;
   4. sa fie testata;
   5. sa fie taiata īn bucati mici;
   
   
4. Cānd plumbul este identificat:
   1. apare un complex violet;
   2. apare un complex galben;
   3. interferenta altor ioni poate afecta rezultatul;
   4. sunt utilizate substante periculoase;
   5. apare un complex albastru;
   
   
5. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al¹⁺;
   2. este identificat ca cationul Al³⁺;
   3. prezenta altor ioni poate produce un rezultat fals negativ;
   4. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The paper requires before analysis of the sample:
   1. to be acidified;
   2. to be cut in small pieces;
   3. to measure its surface;
   4. to be dry;
   
   
2. When lead is identified:
   1. a violet complex appears;
   2. precautions should be made for toxic wastes disposal;
   3. a red-brown complex appears;
   4. a heat release is observed;
   
   
3. When the electrical circuit is closed:
   1. water dissociation is inhibited;
   2. elements from the metals are passed into solution as anions;
   3. elements from the metals are passed into solution as cations;
   4. elements from the solution are passed into sample as metals;
   
   
4. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   2. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   
   
5. When aluminum is identified:
   1. the presence of other ions may produce a false positive outcome;
   2. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   3. is identified as Al²⁺ cation;
   4. only one identification reaction is possible;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Hartia necesita ca īnainte de analiza probei:
   1. sa fie acidulata;
   2. sa fie taiata īn bucati mici;
   3. sa i se masoare suprafata;
   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. apare un complex rosu-brun;
   4. se observa o eliberare de caldura;
   
   
3. Cānd circuitul electric este īnchis:
   1. disocierea apei este inhibata;
   2. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   3. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   4. elemente din solutie sunt trecute īn proba ca metale;
   
   
4. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   2. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   5. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   
   
5. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat fals pozitiv;
   2. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   3. este identificat ca cationul Al²⁺;
   4. doar o reactie de identificare este posibila;
   5. exista multe reactii posibile de identificare;
   
   

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 weighted;
   3. to be dry;
   4. to be tested;
   
   
2. When the electrical circuit is closed:
   1. anions from the solution are passed into sample as metals;
   2. elements from the solution are passed into sample as metals;
   3. electric current passes the sample and the paper;
   4. water dissociation is inhibited;
   
   
3. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
4. When lead is identified:
   1. a heat release is observed;
   2. interference of other ions may affect the outcome;
   3. a blue complex appears;
   4. precautions should be made for toxic wastes disposal;
   
   
5. This method of analysis of metals and alloys is:
   1. a nondestructive method of analysis;
   2. a destructive method of analysis;
   3. a gravimetric method of analysis;
   4. a quantitative method of analysis;
   
   

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 cantarita;
   3. sa fie uscata;
   4. sa fie testata;
   5. sa fie taiata īn bucati mici;
   
   
2. Cānd circuitul electric este īnchis:
   1. anionii din solutie sunt trecuti īn proba ca metale;
   2. elemente din solutie sunt trecute īn proba ca metale;
   3. curent electric trece prin proba si hārtie;
   4. disocierea apei este inhibata;
   
   
3. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
4. Cānd plumbul este identificat:
   1. se observa o eliberare de caldura;
   2. interferenta altor ioni poate afecta rezultatul;
   3. apare un complex albastru;
   4. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   5. reactiile utilizate īn mod clar ii indica prezenta;
   
   
5. Aceasta metoda de analiza de metale si aliaje este:
   1. o metoda nedistructiva de analiza;
   2. o metoda distructiva de analiza;
   3. o metoda gravimetrica de analiza;
   4. o metoda cantitativa de analiza;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. A redox process:
   1. is always fast and safe;
   2. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. involves changing of the aggregation states of some participants to the reaction;
   
   
2. The density of the solutions depends on:
   1. time elapsed since were prepared;
   2. pressure;
   3. temperature;
   4. quantity;
   
   
3. In the calculations:
   1. are necessary to establish the coefficients of the chemical reaction;
   2. are necessary to discuss with our colleagues;
   3. are necessary to take some information from reagent bottles;
   4. are necessary to take the results imediatly after these are available from others;
   
   
4. Titration as a laboratory operation involves:
   1. a standard or referential reactive;
   2. an mixing of two ore more solutions;
   3. a burette;
   4. a natrium hydroxide solution;
   
   
5. The following chemical reactions were used in the experiments:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Un proces redox:
   1. este īntotdeauna rapid si sigur;
   2. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   
   
2. Densitatea solutiilor depinde de:
   1. timpul scurs de cand au fost pregatite;
   2. presiune;
   3. temperatura;
   4. cantitate;
   5. concentratie;
   
   
3. In calcule:
   1. este necesara stabilirea coeficientilor reactiei chimice;
   2. este necesar sa discutam cu colegii;
   3. este necesar a se lua unele informatii de pe sticlele de reactivi;
   4. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   
   
4. Titrarea ca o operatiune de laborator implica:
   1. un standard sau reactiv de referinta;
   2. amestecul a doua sau mai multe solutii;
   3. o biureta;
   4. o solutie de hidroxid de sodiu;
   
   
5. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The density of the solutions depends on:
   1. provider;
   2. quantity;
   3. temperature;
   4. time elapsed since were prepared;
   
   
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 energy;
   4. all glassware should be clean before, after and during the experiment;
   
   
3. The following chemical reactions were used in the experiments:
   1. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
4. The equivalence point is:
   1. something rarely encountered in chemistry;
   2. used to balance the equation;
   3. the point in which a reactive should be added in the reaction flask;
   4. indicated when a color change is observed into the solution;
   
   
5. Reactions between acids and bases:
   1. are rarely useful, and even rarely used;
   2. always have as a consequence the formation of a quantity of water;
   3. have as a consequence the dissolution of a salt;
   4. are always fast, taking place almost instantaneously;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Densitatea solutiilor depinde de:
   1. furnizor;
   2. cantitate;
   3. temperatura;
   4. timpul scurs de cand au fost pregatite;
   5. presiune;
   
   
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 energiei;
   4. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   
   
3. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
4. Punctul de echivalenta este:
   1. ceva rar īntālnit īn chimie;
   2. folosit pentru a echilibra ecuatia;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   4. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   5. punctul īn care un reactiv este consumat complet īn reactie;
   
   
5. Reactiile īntre acizi si baze:
   1. sunt rareori utile, si chiar mai rar utilizate;
   2. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   3. au drept consecinta dizolvarea unei sari;
   4. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. Reactions between acids and bases:
   1. are rarely useful, and even rarely used;
   2. always have as a consequence the formation of a quantity of water;
   3. are always fast, taking place almost instantaneously;
   4. are all exothermic, being therefore dangerous outside of the laboratory;
   
   
2. The equivalence point is:
   1. the point in which a reactive should be added in the burette;
   2. used to balance the equation;
   3. the point in which a reactive is fully consumed in the reaction;
   4. the point in which a reactive should be added in the reaction flask;
   
   
3. The following chemical reactions were used in the experiments:
   1. H₂O + CO₂ -> H₂CO₃
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   
4. The indicator should be added:
   1. to indicate our safety limits when we dealt with chemicals;
   2. in small quantities, to avoid the errors in observations and in calculations;
   3. only at the suggestion of the supervisor;
   4. only in special cases, when the burette is graded from its bottom to its top;
   
   
5. A redox process:
   1. occurs only when we mix wrong substances in the laboratory;
   2. involves changing of the aggregation states of some participants to the reaction;
   3. involves a transfer of electrons from one atom or group of atoms to another;
   4. is always fast and safe;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Reactiile īntre acizi si baze:
   1. sunt rareori utile, si chiar mai rar utilizate;
   2. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   3. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   4. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   5. au ca efect schimbarea culorii unei solutii;
   
   
2. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   2. folosit pentru a echilibra ecuatia;
   3. punctul īn care un reactiv este consumat complet īn reactie;
   4. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   5. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   
   
3. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂O + CO₂ -> H₂CO₃
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   5. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
4. Trebuie adaugat indicatorul:
   1. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   2. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   3. numai la sugestia supraveghetorului;
   4. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   5. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   
   
5. Un proces redox:
   1. apare numai atunci cānd se amesteca substante gresit īn laborator;
   2. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   3. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   4. este īntotdeauna rapid si sigur;
   5. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The density of the solutions depends on:
   1. concentration;
   2. time elapsed since were prepared;
   3. pressure;
   4. temperature;
   
   
2. The equivalence point is:
   1. used to balance the equation;
   2. the point in which a reactive is fully consumed in the reaction;
   3. the point in which a reactive should be added in the burette;
   4. something rarely encountered in chemistry;
   
   
3. The following chemical reactions were used in the experiments:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. H₂O + CO₂ -> H₂CO₃
   
   
4. Reactions between acids and bases:
   1. are rarely useful, and even rarely used;
   2. have as a consequence the dissolution of a salt;
   3. have as effect the change of the color of a solution;
   4. are all exothermic, being therefore dangerous outside of the laboratory;
   
   
5. The indicator should be added:
   1. in large quantities, according to the principle 'only size matters';
   2. to indicate our safety limits when we dealt with chemicals;
   3. to provide a color change at equivalence point;
   4. only at the suggestion of the supervisor;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Densitatea solutiilor depinde de:
   1. concentratie;
   2. timpul scurs de cand au fost pregatite;
   3. presiune;
   4. temperatura;
   5. furnizor;
   
   
2. Punctul de echivalenta este:
   1. folosit pentru a echilibra ecuatia;
   2. punctul īn care un reactiv este consumat complet īn reactie;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   4. ceva rar īntālnit īn chimie;
   
   
3. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. H₂O + CO₂ -> H₂CO₃
   
   
4. Reactiile īntre acizi si baze:
   1. sunt rareori utile, si chiar mai rar utilizate;
   2. au drept consecinta dizolvarea unei sari;
   3. au ca efect schimbarea culorii unei solutii;
   4. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   
   
5. Trebuie adaugat indicatorul:
   1. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   2. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   3. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   4. numai la sugestia supraveghetorului;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. When a chemical reaction is balanced, following should be considered:
   1. all glassware should be clean before, after and during the experiment;
   2. the principle of the conservation of the energy;
   3. the principle of the conservation of the number of atoms for each element;
   4. the principle of the conservation of the volume;
   
   
2. 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 large quantities, according to the principle 'only size matters';
   4. only in special cases, when the burette is graded from its bottom to its top;
   
   
3. Reactions between acids and bases:
   1. are always fast, taking place almost instantaneously;
   2. always have as a consequence the formation of a quantity of water;
   3. are rarely useful, and even rarely used;
   4. have as effect the change of the color of a solution;
   
   
4. A redox process:
   1. involves changing of the aggregation states of some participants to the reaction;
   2. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
5. The density of the solutions depends on:
   1. quantity;
   2. time elapsed since were prepared;
   3. provider;
   4. temperature;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   2. principiul conservarii energiei;
   3. principiul conservarii numarul de atomi pentru fiecare element;
   4. principiul conservarii volumului;
   
   
2. 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 mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   4. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   
   
3. Reactiile īntre acizi si baze:
   1. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   2. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   3. sunt rareori utile, si chiar mai rar utilizate;
   4. au ca efect schimbarea culorii unei solutii;
   5. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   
   
4. Un proces redox:
   1. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   2. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
5. Densitatea solutiilor depinde de:
   1. cantitate;
   2. timpul scurs de cand au fost pregatite;
   3. furnizor;
   4. temperatura;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   2. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
2. We may say the followings:
   1. water is good for drinking, it is nothing to be analysed;
   2. purification of the water may include physical processes;
   3. natural water may contain organic matter and living organisms;
   4. purification of the water may include labeling processes;
   
   
3. EDTA is used:
   1. for indication of the equilibrium point in the reaction;
   2. for recharging of the resin for water softening;
   3. as reagent for determining the hardness of the water;
   4. for complexing of Na¹⁺ and K¹⁺ ions;
   
   
4. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   2. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   
   
5. For a water sample following measures may be quantitatively expressed:
   1. mineral acidity;
   2. permanent alkalinity;
   3. color;
   4. total acidity;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   2. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
2. Putem spune urmatoarele:
   1. apa este buna pentru consum, nu este nimic de a fi analizat;
   2. purificarea apei poate include procedee fizice;
   3. apa naturala poate contine materie organica si organisme vii;
   4. purificarea apei poate include procesele de etichetare;
   
   
3. EDTA este utilizat:
   1. pentru indicarea punctului de echilibru īn reactie;
   2. pentru reīncarcarea rasinii la dedurizarea apei;
   3. ca reactiv pentru determinarea duritatii apei;
   4. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   2. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   5. NaOH + NO₃^- -> NaNO₃ + HO^-
   
   
5. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. aciditate minerala;
   2. alcalinitate permanenta;
   3. culoare;
   4. aciditate totala;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. In the laboratory were analyzed:
   1. the concentration of the water;
   2. the alkalinity of the water;
   3. the softness of the water;
   4. the mass of the water;
   
   
2. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   2. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   3. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
3. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. for safety precautions purposes;
   3. for indication of the equilibrium point in the reaction;
   4. as reagent for determining the hardness of the water;
   
   
4. In the laboratory the water were:
   1. alkalinized for drinking purposes;
   2. complexed by using EDTA titrimetric method;
   3. biologically purified using the resin column;
   4. acidified for drinking purposes;
   
   
5. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + NO₃^- -> NaNO₃ + HO^-
   2. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Īn laborator au fost analizate:
   1. concentratia apei;
   2. alcalinitatea apei;
   3. moliciunea apei;
   4. masa apei;
   5. duritatea apei;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   2. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   3. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
3. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. ca masura de siguranta;
   3. pentru indicarea punctului de echilibru īn reactie;
   4. ca reactiv pentru determinarea duritatii apei;
   
   
4. In laborator apa au fost:
   1. alcalinizeaza pentru baut;
   2. complexata prin metoda titrimetrica EDTA;
   3. purificata biologic utilizānd coloana de rasina;
   4. acidulata pentru baut;
   5. calita folosind coloana de rasina;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + NO₃^- -> NaNO₃ + HO^-
   2. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   

FINAL TEST AT LABORATORY
Water analysis

1. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. for indication of the equilibrium point in the reaction;
   3. for recharging of the resin for water softening;
   4. for safety precautions purposes;
   
   
2. In the laboratory the water were:
   1. complexed by using EDTA titrimetric method;
   2. hardened using the resin column;
   3. acidified for drinking purposes;
   4. biologically purified using the resin column;
   
   
3. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + CO₃^2- -> HCO₃^- + Cl^-
   2. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   3. HCl + HO⁺ -> H₂O + Cl⁺
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   
   
4. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   
5. 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 + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. pentru indicarea punctului de echilibru īn reactie;
   3. pentru reīncarcarea rasinii la dedurizarea apei;
   4. ca masura de siguranta;
   5. ca reactiv pentru determinarea duritatii apei;
   
   
2. In laborator apa au fost:
   1. complexata prin metoda titrimetrica EDTA;
   2. calita folosind coloana de rasina;
   3. acidulata pentru baut;
   4. purificata biologic utilizānd coloana de rasina;
   5. alcalinizeaza pentru baut;
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + CO₃^2- -> HCO₃^- + Cl^-
   2. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   3. HCl + HO⁺ -> H₂O + Cl⁺
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   5. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   
5. 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 + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   5. NaOH + Cl⁺ -> NaCl + HO⁺
   
   

FINAL TEST AT LABORATORY
Water analysis

1. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. as reagent for determining the hardness of the water;
   3. for indication of the equilibrium point in the reaction;
   4. for recharging of the resin for water softening;
   
   
2. For a water sample following measures may be quantitatively expressed:
   1. color;
   2. purity;
   3. mineral acidity;
   4. total acidity;
   
   
3. In the laboratory were analyzed:
   1. the acidity of the water;
   2. the color of the water;
   3. the softness of the water;
   4. the mass of the water;
   
   
4. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   2. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   
   
5. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + HO^- -> H₂O + Cl^-
   3. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. ca reactiv pentru determinarea duritatii apei;
   3. pentru indicarea punctului de echilibru īn reactie;
   4. pentru reīncarcarea rasinii la dedurizarea apei;
   5. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   
   
2. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. culoare;
   2. puritate;
   3. aciditate minerala;
   4. aciditate totala;
   
   
3. Īn laborator au fost analizate:
   1. aciditatea apei;
   2. culoarea apei;
   3. moliciunea apei;
   4. masa apei;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   2. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   5. HCl + HO⁺ -> H₂O + Cl⁺
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + HO^- -> H₂O+Cl^-
   3. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   5. HCl + HO⁺ -> H₂O + Cl⁺
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. mineral acidity;
   2. total alkalinity;
   3. purity;
   4. hardness;
   
   
2. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. for safety precautions purposes;
   3. for complexing of Na¹⁺ and K¹⁺ ions;
   4. as reagent for determining the hardness of the water;
   
   
3. We may say the followings:
   1. when water contains dissolved minerals and gases is bad for drinking;
   2. water is good for drinking, it is nothing to be analysed;
   3. purification of the water may include chemical processes;
   4. purification of the water may include biological processes;
   
   
4. In the laboratory the water were:
   1. complexed by using EDTA titrimetric method;
   2. alkalinized for drinking purposes;
   3. softened using the resin column;
   4. hardened using the resin column;
   
   
5. In the laboratory were analyzed:
   1. the color of the water;
   2. the concentration of the water;
   3. the alkalinity of the water;
   4. the acidity of the water;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. aciditate minerala;
   2. alcalinitate totala;
   3. puritate;
   4. duritate;
   5. aciditate totala;
   
   
2. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. ca masura de siguranta;
   3. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   4. ca reactiv pentru determinarea duritatii apei;
   
   
3. Putem spune urmatoarele:
   1. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   2. apa este buna pentru consum, nu este nimic de a fi analizat;
   3. purificarea apei poate include procese chimice;
   4. purificarea apei poate include procese biologice;
   
   
4. In laborator apa au fost:
   1. complexata prin metoda titrimetrica EDTA;
   2. alcalinizeaza pentru baut;
   3. dedurizata folosind coloana de rasina;
   4. calita folosind coloana de rasina;
   
   
5. Īn laborator au fost analizate:
   1. culoarea apei;
   2. concentratia apei;
   3. alcalinitatea apei;
   4. aciditatea apei;
   
   

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

1. In studied corrosion processes:
   1. a gas is released at both corrosion of zinc and aluminum;
   2. the metal it changes its oxidation state becoming an anion;
   3. always the metal changes its oxidation state;
   4. a gas is released only the corrosion of aluminum;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. H⁺ + Ni -> H₂ + Ni²⁺
   3. ZnO + CO -> Zn + CO₂
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
3. Corrosion of metals:
   1. can be reduced by electroplating;
   2. is the destruction of metals under the action of external factors;
   3. may provide useful raw materials for analysis;
   4. can be reduced by passivation;
   
   
4. The zinc plate:
   1. was degreased in sulfuric acid solution;
   2. was involved in the volumetric method of corrosion analysis
   3. was corroded in sulfuric solution;
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
5. The aluminum plate:
   1. was degreased in sodium hydroxide solution;
   2. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   3. the mass is measured before and after immersing it in NaOH;
   4. the volume is measured before and after immersing it in NaOH;
   
   

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

1. Īn procesele de coroziune studiate:
   1. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. īntotdeauna metalul isi schimba starea de oxidare;
   4. un gaz este eliberat numai la corodarea aluminiului;
   5. un gaz este eliberat numai la corodarea zincului;
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. H⁺ + Ni -> H₂ + Ni²⁺
   3. ZnO + CO -> Zn + CO₂
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
3. Coroziunea metalelor:
   1. poate fi redusa prin galvanizare;
   2. este distrugerea metalelor sub actiunea factorilor externi;
   3. poate furniza materii prime utile pentru analiza;
   4. poate fi redusa prin pasivare;
   
   
4. Pentru placa de zinc:
   1. a fost degresata īn solutie de acid sulfuric;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. a fost corodata īn solutie sulfuric;
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
5. Pentru placa de aluminiu:
   1. a fost degresata īn solutie de hidroxid de sodiu;
   2. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   3. masa este masurata īnainte si dupa imersia īn NaOH;
   4. volumul se masoara īnainte si dupa imersia īn NaOH;
   
   

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

1. In studied corrosion processes:
   1. a gas is released at both corrosion of zinc and aluminum;
   2. always the metal changes its oxidation state;
   3. the metal it changes its oxidation state becoming an cation;
   4. a gas is released only the corrosion of aluminum;
   
   
2. The zinc plate:
   1. was corroded in sulfuric solution;
   2. was involved in the gravimetric method of corrosion analysis
   3. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   4. was involved in the volumetric method of corrosion analysis
   
   
3. Which of the following reactions may be called as of corrosion:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. ZnO + CO -> Zn + CO₂
   3. Fe₂O₃ + CO -> Fe + CO₂
   4. Ni(CO)₄ -> Ni + CO
   
   
4. Corrosion of metals:
   1. is the protection in time to chemical agents;
   2. may provide useful raw materials for analysis;
   3. takes place merely from exposure to moisture in air;
   4. can be reduced by electroplating;
   
   
5. The aluminum plate:
   1. was degreased in sodium hydroxide solution;
   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. was involved in the gravimetric method of corrosion analysis
   
   

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

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

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

1. Which of the following reactions may be called as of corrosion:
   1. Ni(CO)₄ -> Ni + CO
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. Fe₂O₃ + CO -> Fe + CO₂
   
   
2. The zinc plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was involved in the gravimetric method of corrosion analysis
   3. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   4. was corroded in sulfuric solution;
   
   
3. Corrosion of metals:
   1. may provide useful raw materials for analysis;
   2. can be reduced by passivation;
   3. is the destruction of metals under the action of external factors;
   4. is the protection in time to chemical agents;
   
   
4. The aluminum plate:
   1. the mass is measured before and after immersing it in NaOH;
   2. the volume is measured before and after immersing it in NaOH;
   3. was involved in the volumetric method of corrosion analysis
   4. was degreased in sodium hydroxide solution;
   
   
5. In studied corrosion processes:
   1. when a gas is released its volume depends on the amount of metal corroded;
   2. a gas is released at both corrosion of zinc and aluminum;
   3. a gas is released only the corrosion of zinc;
   4. a gas is released only the corrosion of aluminum;
   
   

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

1. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. Ni(CO)₄ -> Ni + CO
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. Fe₂O₃ + CO -> Fe + CO₂
   5. ZnO + CO -> Zn + CO₂
   
   
2. Pentru placa de zinc:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   4. a fost corodata īn solutie sulfuric;
   
   
3. Coroziunea metalelor:
   1. poate furniza materii prime utile pentru analiza;
   2. poate fi redusa prin pasivare;
   3. este distrugerea metalelor sub actiunea factorilor externi;
   4. este protectia de durata impotriva agentilor chimici;
   5. este un proces benefic care arata stabilitatea metalelor;
   
   
4. Pentru placa de aluminiu:
   1. masa este masurata īnainte si dupa imersia īn NaOH;
   2. volumul se masoara īnainte si dupa imersia īn NaOH;
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. a fost degresata īn solutie de hidroxid de sodiu;
   
   
5. Īn procesele de coroziune studiate:
   1. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   2. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   3. un gaz este eliberat numai la corodarea zincului;
   4. un gaz este eliberat numai la corodarea aluminiului;
   
   

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

1. The aluminum plate:
   1. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   2. was corroded in sodium hydroxide solution;
   3. the mass is measured before and after immersing it in NaOH;
   4. the surface is measured before and after immersing it in NaOH;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. ZnO + CO -> Zn + CO₂
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. Fe₂O₃ + CO -> Fe + CO₂
   
   
3. The zinc plate:
   1. was degreased in sulfuric acid solution;
   2. the volume is measured before and after immersing it in H₂SO₄;
   3. was corroded in sulfuric solution;
   4. was involved in the gravimetric method of corrosion analysis
   
   
4. Corrosion of metals:
   1. is the destruction of metals under the action of external factors;
   2. can be reduced by electroplating;
   3. can be reduced by passivation;
   4. takes place merely from exposure to moisture in air;
   
   
5. In studied corrosion processes:
   1. when a gas is released its volume depends on the amount of metal corroded;
   2. a gas is released only the corrosion of zinc;
   3. always the metal changes its oxidation state;
   4. the metal it changes its oxidation state becoming an cation;
   
   

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

1. Pentru placa de aluminiu:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. a fost corodata īn solutie de hidroxid de sodiu;
   3. masa este masurata īnainte si dupa imersia īn NaOH;
   4. suprafata se masoara īnainte si dupa imersia īn NaOH;
   5. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. ZnO + CO -> Zn + CO₂
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. Fe₂O₃ + CO -> Fe + CO₂
   
   
3. Pentru placa de zinc:
   1. a fost degresata īn solutie de acid sulfuric;
   2. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   3. a fost corodata īn solutie sulfuric;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
4. Coroziunea metalelor:
   1. este distrugerea metalelor sub actiunea factorilor externi;
   2. poate fi redusa prin galvanizare;
   3. poate fi redusa prin pasivare;
   4. are loc pur si simplu prin expunerea la umiditate īn aer;
   5. poate furniza materii prime utile pentru analiza;
   
   
5. Īn procesele de coroziune studiate:
   1. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   2. un gaz este eliberat numai la corodarea zincului;
   3. īntotdeauna metalul isi schimba starea de oxidare;
   4. metalul isi schimba starea de oxidare pentru a deveni un cation;
   5. un gaz este eliberat numai la corodarea aluminiului;
   
   

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

1. The aluminum plate:
   1. the mass is measured before and after immersing it in NaOH;
   2. the surface is measured before and after immersing it in NaOH;
   3. was involved in the volumetric method of corrosion analysis
   4. the volume is measured before and after immersing it in NaOH;
   
   
2. Corrosion of metals:
   1. may provide useful raw materials for analysis;
   2. can be reduced by passivation;
   3. is a beneficial process that shows the stability of metals;
   4. is the destruction of metals under the action of external factors;
   
   
3. The zinc plate:
   1. was involved in the volumetric method of corrosion analysis
   2. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   3. the mass is measured before and after immersing it in H₂SO₄;
   4. was involved in the gravimetric method of corrosion analysis
   
   
4. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. H⁺ + Ni -> H₂ + Ni²⁺
   3. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   
5. In studied corrosion processes:
   1. when a gas is released its volume depends on the amount of metal corroded;
   2. always the metal changes its oxidation state;
   3. the metal it changes its oxidation state becoming an cation;
   4. a gas is released only the corrosion of aluminum;
   
   

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

1. Pentru placa de aluminiu:
   1. masa este masurata īnainte si dupa imersia īn NaOH;
   2. suprafata se masoara īnainte si dupa imersia īn NaOH;
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. volumul se masoara īnainte si dupa imersia īn NaOH;
   5. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
2. Coroziunea metalelor:
   1. poate furniza materii prime utile pentru analiza;
   2. poate fi redusa prin pasivare;
   3. este un proces benefic care arata stabilitatea metalelor;
   4. este distrugerea metalelor sub actiunea factorilor externi;
   5. are loc pur si simplu prin expunerea la umiditate īn aer;
   
   
3. Pentru placa de zinc:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   3. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   5. a fost corodata īn solutie sulfuric;
   
   
4. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. H⁺ + Ni -> H₂ + Ni²⁺
   3. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   5. Al₂O₃ + NaOH -> NaAlO₂
   
   
5. Īn procesele de coroziune studiate:
   1. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   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 numai la corodarea aluminiului;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. The intensity of the current:
   1. does not affect the quality nor the quantity of the nickel deposition;
   2. is to be adjusted when the experiment starts;
   3. it depends on the surface of the sample;
   4. should be adjusted by the technicians, we have nothing to do there;
   
   
2. Theoretical mass of nickel deposited is calculated using:
   1. the electrolysis law;
   2. solutions laws;
   3. perfect gas law;
   4. the conservation of the number of atoms for each element law;
   
   
3. Electrical conductivity of nickel salts solutions:
   1. is relatively small;
   2. depends on the intensity of the current used;
   3. is relatively high;
   4. depends on the potential of the source used;
   
   
4. It is expected to have a mass of nickel deposited:
   1. inversely proportional with the intensity of the current used;
   2. inversely proportional with the surface of the sample;
   3. proportional with the intensity of the current used;
   4. proportional with the nickel plating time;
   
   
5. At the nickel plating following reactions took place:
   1. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   2. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   3. at anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   4. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. It is expected to have a mass of nickel deposited:
   1. proportional with the intensity of the current used;
   2. much higher than the calculated theoretical one;
   3. inversely proportional with the nickel plating time;
   4. lower than the calculated theoretical one;
   
   
2. The intensity of the current:
   1. does not affect the quality nor the quantity of the nickel deposition;
   2. is to be calculated before to start the experiment;
   3. affect only the quantity 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. depends on the potential of the source used;
   2. is relatively high;
   3. is improved by salts additions;
   4. depends on the intensity of the current used;
   
   
4. At the nickel plating following reactions took place:
   1. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   2. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   3. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   4. at anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   
   
5. Theoretical mass of nickel deposited is calculated using:
   1. solutions laws;
   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. proportionala cu intensitatea curentului utilizat;
   2. mult mai mare decāt cea teoretica calculata;
   3. invers proportional cu timpul de nichelare;
   4. mai mica decāt cea teoretica calculata;
   5. mai mare decāt cea teoretica calculata;
   
   
2. Intensitatea curentului:
   1. nu afecteaza calitatea nici cantitatea nichelului depus;
   2. trebuie sa fie calculata īnainte de a īncepe experimentul;
   3. afecteaza numai cantitatea de nichel depus;
   4. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   
   
3. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. depinde de potentialul sursei utilizate;
   2. este relativ mare;
   3. este īmbunatatita prin adaosuri de saruri;
   4. depinde de intensitatea curentului utilizat;
   5. este redusa prin adaosuri de saruri;
   
   
4. La nichelare urmatoarele reactii au avut loc:
   1. la anod (+), īn contact cu piesa de nichel, Ni⁰ - 2e^- -> Ni²⁺
   2. la catod (-), īn legatura cu piesa metalica, Ni⁰ - 2e^- -> Ni²⁺
   3. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   4. la anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   
   
5. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea solutilor;
   2. legea gazelor perfecte;
   3. conservarea numarului de atomi pentru fiecare element;
   4. legea conservarii energiei;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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