Chemical Kinetics : Fill in the blanks exam chemistry questions part 2

16. By __________ the surface area of the reactants, the rate of reaction is increased.

17. Rate of reaction generally __________ with the rise of temperature.

18. A __________ is a substance, which either accelerates or retards the rate of reaction without taking part in the reaction.

19. In the preparation of Oxygen from Potassium Chlorate, __________ is used as catalyst.

20. In the oxidation of SO2 to SO3 by the contact process for the manufacture of H2SO4 __________ is used as catalyst.

21. An unstable intermediate compound formed during a chemical reaction is called __________.

22. When a catalyst and the reactants are in the same phases, it is known as __________ catalyst.

23. When a catalyst and the reactants are in different phases, it is called __________.

24. When a catalyst increases the rate of reaction, it is called __________ catalyst.

25. When a catalyst retards the rate of reaction, it is called __________ catalyst.

26. A negative catalyst __________ the energy of activation, hence the rate of reaction is decreased.

27. The ratio between the rate of reaction and concentration of reactants is known as __________.

28. Velocity constant is independent of concentration but depends on __________.

29. Ionic reactions are __________ than molecular reactions.

30. The value of specific rates constant for a reaction __________ with time.

31. The sum of all exponents of concentration terms in the equation is called __________.

32. The sum of moles taking part in a chemical reaction is called __________ of the reactions.

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Chemistry Past year IIT JEE question bank - Chemical Kinetics

1. The rate constant of a first order reaction depends on the

a. temperature
b. time
c. concentration of the reactant
d. concentration of the product
(JEE 1983)

Answer (a)

2. a catalyst is a substance which

a. increases the equilibrium concentration of the product
b. increases the equilibrium constant of the reaction.
c. supplies energy to the reaction
d. shortens the time to reach equilibrium
(JEE 1983)

Answer: (d)

IIT JEE Chemistry question Bank with answer

JEE Question 2007 Paper II

Consider a reaction aG+bH--> Products. When concentration of both the reactants G and H is doubled, the rate increases by eight times. However, when concentration of G is doubled keeping the concentration of H fixed, the rate is doubled. The overall order of the reaction is
(A) 0
(B) 1
(C) 2
(D) 3

Solution: D

Reason: When G alone is doubled, rate is doubled. That is the exponent of [G] is one in rate law. When both are doubled, rate increases by 8 times, telling us that exponent of [H] is 2 in rate law. So overall order of reaction is sum of the two exponents that is 3.