Review questions, analyze choices, and reveal correct answers at your own pace.
1. Reaction between silver nitrate and sodium chloride goes to completion because
A. the reaction is instantaneous
B. silver nitrate is insoluble in water
C. silver chloride is sparingly soluble in water
D. solubility of silver nitrate increases with sodium chloride
Correct Option: silver chloride is sparingly soluble in water
2. 200 mL of M/50 HCl are mixed with 100 mL of M/100 HCl the pH of the resulting solution would be
A. 2.22
B. 1.78
C. 2
D. zero.
Correct Option: 1.78
3. In a reversible reaction two substances are in equilibrium. If the concentration of each one is doubled the equilibrium constant will be
A. Reduced to half its original value
B. Reduced to one fourth of its original value
C. Doubled
D. Constant.
Correct Option: Constant.
4. Homogeneous equilibrium is one in which there are
A. all the three phases
B. no phases
C. two phases
D. one phase
Correct Option: one phase
5. Which of the following statements is correct about the equilibrium constant?
A. Its value increases by increase in temperature
B. Its value decreases by decrease in temperature
C. Its value may increase or decrease with increase in temperature
D. Its value is constant at all temperature.
Correct Option: Its value may increase or decrease with increase in temperature
6. Ostwalds dilution law is applicable to
A. Strong electrolytes only
B. Week electrolytes only
C. Non-electrolytes
D. Strong as well as weak electrolytes
Correct Option: Week electrolytes only
7. Which of the following statements is not correct regarding the equilibrium constant?
A. Its value does not depend upon the initial conc. of the reactants
B. Its value does not depend upon the initial conc. of the products
C. Its value does not depend upon nature of the reactants
D. Its value does not depend upon presence of catalyst.
Correct Option: Its value does not depend upon nature of the reactants
8. Equilibria are those in which the reactants and products are present in more than phases:
A. Physical
B. Heterogeneous
C. Chemical
D. Homogeneous
Correct Option: Heterogeneous
9. Sulphanilic acid is a/an
A. Arrhenius acid
B. Lewis base
C. Neither (a) nor (b)
D. Both (a) and (b).
Correct Option: Both (a) and (b).
10. To a solution equimolar mixture of sodium acetate solution is added. The pH of mixture solution
A. increase
B. decreases
C. remains unchanged
D. unpredictable.
Correct Option: increase
11. On mixing 1 mole of ethyl alcohol with 1 mole of acetic acid at 298 K the equilibrium concentration of ester and water becomes 2/3 moles each. If 3 moles of alcohol is mixed with 1 mole of acid the concentration of ester in moles at equilibrium will be
A. 0.09
B. 0.9
C. 1.1
D. 2.2
Correct Option: 0.9
12. Equilibrium constant changes with
A. time
B. temperature
C. pressure
D. both temperature and concentration
Correct Option: temperature
13. A substance x dissolves in water with a decrease in volume and absorption of heat solubility of X will be favoured by
A. low pressure high temp.
B. low temp. high pressure
C. low temp. low pressure
D. high temperature high pressure
Correct Option: high temperature high pressure
14. Melting of ice is favoured by
A. low pressure high temp.
B. low temp. low pressure
C. high pressure low temp.
D. high temp. high pressure
Correct Option: high pressure low temp.
15. The chemical system in equilibrium is not affected by
A. change in the concentration of products
B. increase in the concentration of reactants
C. addition of a catalyst
D. changing the temperature
Correct Option: addition of a catalyst
16. According to Le Chateliers principal adding heat to a solid and liquid in equilibrium will cause the
A. amount of solid to decrease
B. amount of liquid to decrease
C. temperature to rise
D. temperature to fall.
Correct Option: amount of solid to decrease
17. 0.1 M solution of which of the substance will behave basic?
A. sodium borate
B. ammonium chloride
C. calcium nitrate
D. sodium sulphate.
Correct Option: sodium borate
18. In the case of exothermic reactions equilibrium constant Kdecreases with temperature
A. remains unchanged with temperature
B. depends on the nature
C. decreases with temperature
D. increases with pressure
Correct Option: decreases with temperature
19. Which of the following is not a Lewis base?
A. An acid is added to it
B. A base is added to it
C. Either a base or an acid is added to it
D. Temperature is raised.
Correct Option: Temperature is raised.
20. Which of the following will not change the concentration of ammonia at the equilibrium?
A. Increase of pressure
B. Increase of volume
C. Addition of catalyst
D. Decrease of temperature.
Correct Option: Addition of catalyst
21. Which of the following aqueous solutions will have highest pH?