MCQ FOR CHEMICAL KINETICS
ACCORDING TO M.P BOARD -2023-24
1. The rate of chemical reaction depends upon
(a) Active mass (b)
Atomic mass
(c) Equivalent weight (d) Molecular mass.
2.Arrhenius equation is :
(a) k = e-EaRT (b) k = EaRT
(c) k = logEaRT (d) k = Ae-Ea/RT
3.Unit of velocity constant of first order
reaction
(a) mol
litre-1 sec-1 (b) mol-1 litre+1 sec-1
(c) sec-1 (d) mol litre-1 sec
4.Unit of velocity constant of zero order
reaction
(a) mol litre-1 sec-1 (b) mol-1 litre+1 sec-1
(c) sec-1 (d) mol litre-1 sec
5.Rate constant of a reaction increased with
the increase of which of the following factor as :
(a) Pressure
(b)
Temperature
(c)
Concentration of reaction (d) All of these.
6.Factor on which the rate constant of the 1st
order reaction does not depend :
(a)
Temperature (b) Catalyst
(c)
Activation energy (d) Concentration of reactant..
7.Minimum
energy required for molecules to react is called :
(a) Potential energy (b) Kinetic energy
(c) Nuclear energy (d) Activation energy.
8.Law
of mass action prepared by :
(a) Dalton (b) Guddberg and Waaje
(c) Hunds and
Mulliken (d) Arrhenius.
9.Unit
of reaction rate is:
(a) mol litre-1 sec-1 (b)
mol-1 litre sec-1
(c) mol-1 litre-1 sec (d)
mol litre sec
10. With the progress of the reaction, the rate of reaction
(a) Increases (b) Decreases (c) Not variable (d) Variable.
11.The rate of Zero order reaction is independent
on the factor of
(a) The temperature of
reaction
(b) Concentration of
reaction
(c) Concentration of
product
(d) The
concentration of reactants
12. The specific rate constant of a first order
reaction is dependent on:
(a) The
temperature (b) The pressure
(c) The concentration
of reagents
(d) The concentration
of product.
13. The rate constant of a reaction increases with
the increase of which of the following factors
(a) Pressure (b) Temperature
(c) Concentration of
reactants (d) All of these.
14. The main reason for increasing the rate of
reaction on increasing the
temperature of a reactant is
(a) Increase in
the effective no. of collisions.
(b) Increase in
activation energy
(c) Lowering of
activation energy
(d) Increasing of the
number of molecules.
15. 'The rate of reaction does not depend on the
concentration of reactants, this reaction will be
(a) The first order
reaction
(b) The second order
reaction
(c) The third order
reaction
(d) The zero
order reaction.
16. Rate of a reaction = k[A]m [B]n
its order will be:
(a) m+n (b) m – n (c) n (d) m
17. The reaction order of radioactive decay is
(a) Zero
(b) First (c) Second (d) Third.
18. The half-life period of a first order reaction is
dependent on the
(a) Concentration of
reactant
(b) Concentration of
product
(c) Concentration of
reactant and product
(d) Not on the
concentration of both reactant and product
19. In a
chemical reaction A→ B. It is found that the rate of reaction
doubles when the concentration of A is quadrupled. The order of the reaction
will be:
(a) Zero (b) One (c) Two
(d) Half.
20.
Increasing of the rate of reaction on increasing the temperature is due to :
(a) Increase in
the effective number of collision
(b) Increase in the value of activation energy
(c) Decrease in the value of activation energy
(d) Increase in the number of molecules.
21. Which
of the following is changed by the use of a catalyst in a reaction :
(a) Reaction product
(b) Equilibrium constant
(c) Activation
energy
(d) Reaction heat.
22. When a
reaction occurs in the number of terms (steps), then order of the reaction is
determined by the :
(a) Slowest
step
(b) Fastest step
(c) Sum of the speed of all the steps
(d) Molecularity of all the steps.
23. Integrated rate equation of a first order reaction is..
k= 2.303/t log a/ (a-x) 
24. The reaction rate is ........... to the concentration of
reactants. Proportional
25. The value of ................of the reaction cannot be zero Molecularity
26.Hydrolysis of ethyl acetate is a………..order of reaction First
27.Photosyrhesis is a ……. Order of reaction Zero
28. The time in which the concentration of the reactant is
reduced to half of its initial concentration is called ......….....
Half life
Period
29. In the rate equation, the sum of exponents of the concentration
terms of the reactant is……… Order of reaction
30. The ratio of the rate constant of forward and backward reaction
in a reversible reaction is called .............. Equilibrium
constant
31................ does not depend on the concentration or
pressure of the reactant or product. Rate
constant
32. Hydrolysis of ethyl acetate in acidic medium is a ..................
order reaction First
33. Molecularity is always.... Whole
number
34. The total number of molecules participated in a reaction is
called ........ Molecularity
35. Fast reactions are completed in less than ....... seconds 10-12 Sec
Q. 36. Match the following:
'A' 'B'
36. Zero order reaction mol
L-1 sec-1
37. First order reaction Sec-1
38. Second order reaction mol-1 L sec-1
39. Third order reaction mol-2L2s-1
Answer in one word / sentence:
40. Which type of reaction does not depend on concentration Zero
41. What is the change in concentration of reactant in unit time
called? Rate of Reaction
42. What is the energy required for the completion of a reaction
called? Activation Energy
43. Write the formula of half-life period for first order
reaction
t1/2 = 0.693/k
44.The half life period for zero order reaction is proportional
to Initial Concentration of reactant
45. Difference Between Rate of Reaction and Reaction Rate
Constant
The following are the
points of difference between the rate of reaction and reaction rate constant-
|
Rate of Reaction |
Reaction Rate Constant |
|
1.It is measured as the rate of change of concentration of any
reactant or product. |
1.It is a constant of proportionality. |
|
2.It depends upon the concentration of reactants. |
2.It is independent of the concentration of reactants. |
|
3.It changes in a reaction. |
3.It is constant for a reaction. |
|
4.Its unit is moles Lt-1 sec-1. |
4.Its unit depends upon the order of the reaction. |
|
5.It does not explain the mechanism of the reaction. |
5.It explains the mechanism of the reaction. |
46.Difference Between Order of Reaction and Molecularity of
Reaction
The following are the
points of difference between the order of reaction and molecularity of
reaction.
|
Order of Reaction |
Molecularity of Reaction |
|
1. It is the number of reacting molecules whose concentration
actually changes during the reaction. |
1. It is the number
of reacting species as indicated by the balanced chemical equation. |
|
2. Order of reaction is an experimental parameter. |
2. Molecularity of a reaction is an assigned parameter. |
|
3. Order of any reaction is obtained from the experimental
data. |
3. Molecularity is obtained from the stoichiometric equation. |
|
4. It has factorial values in addition to zero also. |
4. It has whole number values only i.e., 1, 2, 3, 4…… |
|
5. It is used to study the mechanism of the reaction. |
5. It does not convey anything about the mechanism of the
reaction. |
|
6. It is the overall order of reaction and not of the separate
step used to determine the order of the |
6. The overall
molecularity of a complex reaction has no significance. |
47. Activation energy- the minimum amount of
energy that is required to activate atoms or molecules to a condition in which
they can undergo chemical transformation or physical transport. In
transition-state theory, the activation energy is the difference in energy
content between atoms or molecules in an activated or transition-state
configuration and the corresponding atoms and molecules in their initial
configuration. The activation energy is usually represented by the symbol Ea in
mathematical expressions for such quantities as the reaction rate constant, k =
Aexp(−Ea/RT), and the diffusion coefficient, D = Doexp(−Ea/RT).
48. Threshold
energy:
The minimum energy that all colliding molecules must possess in
order to make the collisions effective and successful is called threshold
energy.
