Question

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

• A. $mol^{1-n} L^{1-n_{S}}$
• B. $mol^{1-n} L^{2 n} s^{-1}$
• C. $mol^{1-n} L^{n-1} s^{-1}$
• D. $mol^{1-n} L^{1-n} s^{-1}$

Answer 1

Answer: (C)

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