Question

Half-life of a reaction is found to be inversely proportional to the cube of initial concentration. The order of reaction is

• A. 5
• B. 2
• C. 4
• D. 3

Answer 1

Answer: (C)

We know that if $t_{1/2}\propto 1/a^n$
then, order of reaction $=n+1$
Given that $t_{1/2}\propto 1/a^3$
$\therefore$ order of this reaction $=3+1=4$