Question

The rate constant of a reaction is $1 \times 10^{-2} mol ^{-2} L ^{2} s ^{-1}$. 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 $= mol ^{1}-{ }^{-n} L ^{n-1} s ^{-1}$.
where, $n=$ order of reaction
Given, units of rate constant $= mol ^{-2} L ^{2} s ^{-1}$
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.