Question

Consider the plots given below, for the type of reaction $nA\to B+C$. These plots correspond to the reaction orders respectively:

• A. 0, 1, 2
• B. 1, 2, 0
• C. 3, 2, 1
• D. 1, 0, 2

Answer 1

The correct option is D 1, 0, 2

(i) First order reaction's half life does not depend upon initial concentration

$t_{1/2}=\frac{0.693}{k}$

(Refer to Image 1)

(ii) Zero order reaction's half life is directly proportional to initial-concentration for zero order reaction.

$t_{1/2}=\frac{\left[A\right]}{2k}$

(Refer to Image 2)

(iii) Second order reactions's half life is inversely proportional to the initial concentration or directly proportional to the reciprocal of initial concentration

$t_{1/2}=\frac{1}{ak}$

(Refer to Image 3)