4) NaHco3

5) NH₄OH

8. What of the following substance is used to low the high acidity of the gastric juice and heartburn?

1) Na₂CO₃

2) HCl

3) NaOH

4) NaHco3

5) NH₄OH

9. What is the main intracellular ion?

1. К⁺

2. Na⁺

3. Ca²⁺

4. Fe²⁺

5) Mn⁷

10. What is the main extracellular ion?

1. К⁺

2. Na⁺

3. Ca²⁺

4. Fe²⁺

5)Mn⁷

11. MACROELEMENTS ARE

1. Mn

2. Rb

3. Cs

4. Сu

5. Ca

6. Cl

7. К

8. I

12. ORGANOGENIC ELEMENTS ARE

1. Mn

2. Na

3. Ca

4. Fe

5. Cu

6. N

7. P

8. C

13.TRACE ELEMENTS ARE

1. Mg

2. Ca

3. Cu

4. Cl

5. O

6. S

7. C

8. I

14. The deficiency of which element is the reason of "endemic goitre"?

1. C

2. I

3. Ca

4. O

5. Mn

15. Which of the following ions is central metal atom in hemoglobin?

1. 1) К⁺

2. Na⁺

3. Ca²⁺

4. Fe²⁺

5) Mn⁷+

16. The deficiency of which element causes osteoporosis?

1) K

2) Na

3) Ca

4) Fe

5) Mn

17. Excess of fluorine results in which of the following disease?

1) caries

2) fluorosis

3) anthracosis

4) rickets

5) silicosis

18. Which of the following is resulted due to systematic inhaling of coal dust?

1) silicosis

2) anthracosis

3) aluminosis

4) fluorosis

5) caries

19. Which of the following is resulted due to systematic inhaling of aluminum oxide dust?

1) anthracosis

2) silicosis

3) fluorosis

4) aluminosis

5) caries

Chemical Thermodynamics

1. " What type of a thermodynamic system is 0.9% NaCl solution in a sealed tube?

1) suspension

2) heterogeneous

3) isolated

4) closed

5) open

2. HOMOGENEOUS THERMODYNAMIC SYSTEMS ARE

1) a saturated solution of sodium chloride above the precipitate

2) dilute solution of sugar in water

3) 0.9% sodium chloride solution

4) powder of medicinal product

5) crystalline iodine

6) human

7) plant

3. HETEROGENEOUS THERMODYNAMIC SYSTEMS ARE

1. non-carbonated mineral water

2. dilute solution of sugar in water

3. dilute solution of glucose in water

4. dilute solution of NaC1 in water

5. powder medicinal product

6. animal

7. plant

4. What thermodynamic system of the following transfers to the environment mass (substanse) and energy?

1) open

2) closed

3) Isolation

4) Homogeneous

5) heterogeneous

5. CLOSED THERMODYNAMIC SYSTEM ARE

1) a person

2) plant

3) the cooling stone

4) perfect thermos

5) living cell

6) sealed vial

7) the universe

6. Which of the following thermodynamic system (equal amount of substance) that will have the lowest value of entropy?

1) a dilute solution of glucose

2) a saturated solution of sodium chloride above the precipitate

3) air

4) liquid nitrogen

5) crystalline iodine

7. Which thermodynamic quantity is a measure of the chemical reactivity of the system?

1) The internal energy

2) The temperature of the system

3) The heat of formation of the reaction products

4) the Gibbs energy

5) environmental temperature

8. How does the heat and enthalpy change in an endothermic reaction?

1. Q<0, Н>0

1. Q<0, Н<0

2. Q>0, H>0

3. Q=0, H<0

4. Q>0, Н=0

9. How does the heat and enthalpy change in an exothermic reaction?

1. Q<0, Н<0

5. Q>0, H<0

6. Q>0, H>0

7. Q<0, Н>0

8. Q=0, H>0

10. In which of the following chemical reactions that occur in gas phase, the entropy of the system is not changing?

1. HCl + NH₃  NH₄Cl

9. C₂H₅OH + 3O₂  2CO₂ + 3H₂O

10. NI₃NH₃  N₂ + ЗНI

11. H₂ + Сl₂  2НСl

5) 2CO + O₂  2CO₂

11. In which of the following chemical reactions that occur in gas phase, the entropy of the system is increasing?

1. 2N₂O + 4O₂  2N₂O₅

12. 3Н₂ + N₂  2NН₃

13. 4НСl + O₂  2Сl₂ + 2Н₂O

14. N₂ + О₂  2NO

15. 2Н₂O₂  2H₂O + O₂

12. Human being is what type of thermodynamical system?

1) open homogenous

2) closed heterogeneous

3) isolated homogenous

4) open heterogeneous

5) closed homogeneous

13. In which of the following conditions, biochemical reactions take place in the living cell?

1) isobaric

2) isochoric

3) isothermal

4) isochoric-isothermal

5) isobaric-isothermal

14. THE HEAT OF FORMATION OF SUBSTANCES IS EQUAL TO ZERO FOR

1) HNO₃