Question

For a given reaction $t_{1/2}=\frac{1}{k\times a}$. The order of this reaction is:

• A. 0
• B. 1
• C. 2
• D. 3

Answer 1

Answer: (C)

2

$t_{1/2}\propto \frac{1}{{\left(a\right)}^{n-1}}$

Given, $t_{1/2}\propto \frac{1}{a}$

On comparing,

$a^{n-1}=a^1$

$\Rightarrow n-1=1$

$n=1+1=2$