1. Collision theory is satisfaction for:
a) first order reaction
b) second order reaction
c) bimolecular reaction
d) any order reaction
2. Which of the following statement is incorrect:
a) The catalyst does not affect the equilibrium of a reaction.
b) Reaction with higher activation energy has higher rate constant.
c) In an exothermic reaction, the activation energy of the reverse reaction is higher than that of the forward reaction.
d) Half life period of a first order reaction is independent of initial concentration.
3. The rate of reaction that does not involve gases, does not depends upon:
a) pressure
b) temperature
c) concentration
d) catalyst
4. A catalyst increases the rate of reaction by:
a) increasing the activation energy
b) decreasing the activation energy
c) reacting with reactants
d) reacting with products
5. For the first order reaction, half-life is 14 seconds. The time required for the initial concentration to reduce the 1/8th of it's value is:
a) 28 seconds
b) 42 seconds
c) 14 seconds
d) infinite time period
6. The conversion of A-> B follows second order kinetics. Doubling the concentration of A will increase the rate of formation of B by a factor of:
a) 1/4
b) 2
c) 1/2
d) 4
7. Half-life period of a zero order reaction is:
a) proportional to initial concentration of reactants
b) independent of initial concentration of reatants
c) inversely proportional to initial concentration of reactants
d) inversely proportional to the square of the initial concentration of reactants
8. The ratio of the time period for 3/4th of the reaction of first order to complete to that required for half of the reaction is:
a) 4:3
b) 3:2
c) 2:1
d) 1:2
9. The rate of a reaction between two reactants A and B decreases by a factor of 4, if concentration of reactant B is doubled. The order of this reaction with respect to reactant B is :
a) 2
b) -2
c) 1
d) -1
10. If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately:
a) 45 minutes
b) 60 minutes
c) 40 minutes
d) 50 minutes
Given that log4= 0.60, log5 = 0.69
11. Gold number is minimum in case of :
a) gelatin
b) egg albumin
c) gum arabic
d) starch
12. Hydrolysis of starch involves the use of enzyme :
a) maltase
b) zymase
c) invertase
d) diastase
13. Which of the following substances gives a positively charged Sol?
a) Gold
b) A metal sulphide
c) Ferric hydroxide
d) An acidic dye.
14. A chemical adsorption process will always have ∆H value:
a) more than 40kJ
b) less than 40kJ
c) equal to 40 kJ
d) any of the above
15. Which of the following is less than zero during adsorption?
a) ∆G
b) ∆S
c) ∆H
d) all of the above
16. Butter is a Colloid formed when :
a) fat is dispersed in water
b) fat globules are dispersed in water
c) water is dispersed in fat
d) none of the above
17. How many layers are adsorbed in chemical adsorption?
a) one
b) two
c ) many
d) zero
18. The simplest way to check whether a system is colloidal by:
a) electrodialysis
b) finding out particle size
c) Tyndal effect
d) Brownian movement
19. The extent of adsorption of a gas on solid depends on :
a) nature of the gas
b) pressure of the gas
c) temperature of the gas
d) all of the above
20. At critical micelle Concentration (CMC), the surface molecules :
a) decomposes
b) become completely soluble
c) associate
d) dissociate
SOLUTIONS :-
1(c), 2(b), 3(a), 4(b), 5(b), 6(d), 7(a), 8(c), 9(b), 10(a), 11(a), 12(d), 13(c), 14(a), 15(d), 16(c), 17(a), 18(c), 19(d), 20(c)