Chemical Equilibrium - Chapter No 6

Right Answers have been shown below in red color.

1. When the rate of opposing reactions is equal then we say that the chemical reaction is in _________.

a) Equilibrium
b) Stable
c) Change
d) None of these

2. The reactions which occur both in forward and reverse directions are called _______ reactions.

a) Change
b) Reversible
c) Indirectly
d) Evaporation

3. The process of chemical equilibrium is true for __________ reactions.

a) Reversible
b) Forward
c) Increase
d) Decrease

4. The law of mass action was introduced by Guldberg and __________ in 1869.

a) Joule
b) Maxwell
c) Wage
d) None of these

5. The equilibrium constant “Kc” has __________ unit.

a) No
b) One
c) Two
d) Three

6. A substance that completely ionizes in an aqueous solution and gives us positive and negative
ions, is called ________.

a) Strong electrolyte
b) Homogeneous solution
c) Weak electrolyte
d) None of these

7. A substance which partially ionizes in aqueous solution is called ________ electrolyte.

a) Strong
b) Weak
c) Positively
d) None of these

8. H2SO4 is a ___________ electrolyte.

a) Strong
b) Weak
c) Substance
d) Reactant

9. The ionization is the process in which the electrolytes are ________ up into positive and negative ions.

a) Change
b) Phase
c) Split
d) Equilibrium

10. When we increase the temperature then the rate of _________ reaction will decrease.

a) Equal
b) Exothermic
c) Radical
d) None of these

11. “KOH” is a _____________ electrolyte.

a) Strong
b) Weak
c) Ion
d) Molecule

11. “KOH” is a _____________ electrolyte.

a) Strong
b) Weak
c) Ion
d) Molecule

12. “HCN” is a _____________ electrolyte.

a) Weak
b) Strong
c) Positive
d) Aqueous

13. In the chemical reaction CH3 COOH +CH3 OH ⇔ CH3COOH3+H2O the reaction mixture is always expected to contain.

a) All four substance
b) Only products
c) Only reactants
d) CH3COOH+CH<sub3+COOCH<sub3

14. Le-Chatelier’s principle is a generalization that enables us to produce the effect of change.

a) Pressure only
b) Pressure, temperature & concentration
c) temperature& concentration
d) Only temperature

15. For a system 3A+2B ⇔ C the equilibrium constant expression.

a) ([A]3[B]2)/C
b) C/([A]3[B]2)
c) ([A]2[B]3)/C
d) ([A]3[B]3)/C

16. We can deduce the direction in which equilibrium will shift with the help of.

a) Law of mass action
b) Law of heat of formation
c) Le-Chatelier’s principles
d) Hess’ law

17. Rate of exothermic reaction will decrease with an increase in.

a) Volume
b) Temperature
c) Pressure
d) None of the above

18. A stress in an equilibrium system is.

a) Favoured
b) opposed
c) Not opposed
d) None of the above

19. The equilibrium that involves reactant and product in a single phase is called ____.

a) Dynamic
b) Heterogenous
c) Homogenous
d) None of the above

20. 2SO2 + O2 → 2SO3 in the reaction, when the concentration of SO3 is increased than the concentration of O2.

a) Decreases
b) Increases
c) Remains constant
d) None of the above

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