MCQs of Chemical Kinetics

Showing 11 to 20 out of 228 Questions

11.

What is indicated by - \frac{1}{2} \frac{d [N_{2} O_{5}]}{dt} term ?

12.

Which of the following statements is incorrect for Arrhenius rate constant equation ?

(a)	It gives quantitative idea about K and T
(b)	As T increases K is increasing and A is decreasing
(c)	As E_a increases K is increasing
(d)	If Ea = 0 then K = A.

13.

Which of the following statements is incorrect regarding order of reaction and molecularity ?

(a)	Molecularity is the theoretical conclusion while order of reaction is experimental conclusion.
(b)	The value of molecularity is positive integer while the value of reaction order may be positive, negative of zero.
(c)	Molecularity explains the reaction mechanism while reaction order does not give any information about reaction mechanism.
(d)	For elementary reactions, the order of reaction and molecularity are same.

14.

For which elementary reactions, the order of reaction and molecularity will be same ?

(a)	Monomolecular and bimolecular
(b)	Bimolecular and termolecular
(c)	Monomolecular and termolecular
(d)	All the molecular reactions.

15.

Which of the following mathematical relations is correct ?

(a)	$For zero order (t_{\frac{1}{2}} \times K) = \frac{{[R]}_{0}}{2}$
(b)	$For 0.5 order (t_{\frac{1}{2}} \times K) α {\sqrt{[R]}}_{0}$
(c)	$For first order (t_{\frac{1}{2}} \times K) = 0.693$
(d)	All the three relations given here are correct.

16.

What is indicated by negative sign before the term of reaction rate ?

(a)	The kinetic energy of the reaction decreases with time
(b)	The energy barrier of reaction decreases with time
(c)	The energy of activation of reaction decreases with time
(d)	the concentration of reactants decreases with time.

17.

If temperature of the reaction is increased from 300 to 310 K, the value of rate constant is almost doubled because _____

(a)	Kinetic energy is doubled
(b)	The fraction of effective collision of molecules is almost doubled
(c)	The number of molecular collision increases
(d)	Energy of activation decreases.

18.

The reactions having very high values of energy of activation are generally _____

19.

For a first order reaction K = 10^{- 3} \min^{- 1} its t_{\frac{1}{2}} =_____

20.

For which reaction the collision theory is generally more satisfactory ?

Showing 11 to 20 out of 228 Questions