# NEET Chemistry Chemical Kinetics Questions Solved

BOARD

(a) For a reaction , the rate is given by Rate =

(i) How is the rate of reaction affected if the concentration of $\mathrm{B}$ is doubled ?

(ii) What is the overall order of reaction if $\mathrm{A}$ is present in large excess ?

(b) A first order reaction takes 30 minutes for 50% completion. Calculate the time required for 90%

completion of this reaction.
(log 2 = 0.3010                                                                   (5 marks)

a)

(i) Rate will increase 4 times of the actual rate of reaction.

(ii) Second order reaction                                                           (1+1 marks)

b)     ${\mathrm{t}}_{1/2}=\frac{0.693}{\mathrm{k}}$

(1 marks)

Difficulty Level: