Half-life of a reaction is found to be inversely proportional to the cube of i

Question -

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

Options:

A . 2

B . 5

C . 3

D . 4

Answer: Option D
:
D

t_{0} .5 \propto \frac{1}{a^{n - 1}}

Given

t_{0} .5 \propto \frac{1}{a^{3}}

Hence,

n - 1 = 3

∴ n = 4

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