If the unit of rate constant of a reaction is $m o l^{- 1} L S^{- 1}$ then mention its order.

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Solution

If the unit of rate constant of a reaction is $m o l^{- 1} L S^{- 1}$ then the reaction is of second order.
For nth order reaction,
rate $=$ rate constant $\times [A]^{n}$
$m o l L^{- 1} s^{- 1} =$ $m o l^{- 1} L S^{- 1}$ $\times [A]^{n}$
$[A]^{n} = \frac{m o l L^{- 1} s^{- 1}}{m o l^{- 1} L S^{- 1}}$
$[A]^{n} = \frac{m o l L^{- 1}}{m o l^{- 1} L}$
$[A]^{n} = [m o l L^{- 1}]^{2}$
$n = 2$

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