Question

The rate constant of a reaction is $1\times 10^{-2}mo{l}^{-2}{L}^2{s}^{-1}$. The order of the reaction is

• A. 0
• B. 1
• C. 2
• D. 3

Answer 1

Answer: (D)

For $n$ order, the units of rate constant $=mo{l}^1-{}^{-n}{L}^{n-1}{s}^{-1}$.
where, $n=$ order of reaction
Given, units of rate constant $=mo{l}^{-2}{L}^2{s}^{-1}$
On comparing the units of rate constants $1-n=-2$
$\therefore n=3$
or $n-i=2$
$n=3$
$\therefore$ The order of the reaction is three.