Question

For a reaction of order $n$, the unit of the rate constant is :

• A. $mo{l}^{1-n}{L}^{1-n_S}$
• B. $mo{l}^{1-n}{L}^{2n}{s}^{-1}$
• C. $mo{l}^{1-n}{L}^{n-1}{s}^{-1}$
• D. $mo{l}^{1-n}{L}^{1-n}{s}^{-1}$

Answer 1

Answer: (C)

Rate $=k[A{]}^n$
comparing units
$\frac{(mol/l)}{\sec }=k{\left(\frac{mol}{l}\right)}^n$
$\Rightarrow k=mo{l}^{(1-n)}{l}^{(n-1)}{s}^{-1}$