# NEET Chemistry Chemical Kinetics Questions Solved

For the irreversible unimolecular type reaction A $\stackrel{k}{\to }$products in a batch reactor, 80% reactant A(is converted in a 480 second run and conversion is 90% after 18 minute. The order of this reaction is-

(A) 1

(B) 2

(C) 1/2

(D) 3/2

(B) Let the reaction is of 1st order

$k=\frac{2.303}{t}\mathrm{log}\frac{\left[{A}_{0}\right]}{\left[A\right]}$

from 1st data, K

Hence it is not of 1st order Now try for 2nd order.

Since data is following 2nd order kinetics reaction is 2nd order.

Difficulty Level:

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