JEE Main · 2023 · 29 Jan 2023 · Shift 2 · Chemical Kinetics

For conversion of compound

A \to B

, the rate constant of the reaction was found to be

4.6 \times 1 0^{- 5} L mol^{- 1} s^{- 1}

. The order of the reaction is ____。

Answer: 2

Solution

The unit of the rate constant of an

n

-th order reaction is

(mol L^{- 1})^{1 - n} s^{- 1}

. The given unit is

L mo l^{- 1} s^{- 1}

, which is

(mol L^{- 1})^{- 1} s^{- 1}

, so

1 - n = - 1

. Solving gives

n = 2

, so the reaction is of second order.

JEE Main · 2023 · 29 Jan 2023 · Shift 2 · Integer answer