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)

$4$

$t_{1/2}$ (half period) proportional to $\frac{1}{a^{n-1}}$ , here n $=$ order of reaction. If $t_{1/2}$ is proportional to $a^3$ , then reaction will forth order reaction with order $n=4$