For conversion of compound A→B, the rate constant of the reaction was found to be 4.6×10^(-5) Lmol -1s^(-1). The order of the reaction is _____ .

Q30 / 90 · JEE Main 2023 (29 Jan Shift 2) · Chemistry

For conversion of compound $A \to B$ , the rate constant of the reaction was found to be $4.6 \times 10^{- 5} Lmol {}^{- 1} s^{- 1}$ . The order of the reaction is _____ .

Correct answer: 2

Rate(r) $= k {[A]}^{n}$

$\Rightarrow k = \frac{rate}{{[A]}^{n}}$

Unit of rate constant is related to order of reaction $(n)$ by the relation: ${(conc .)}^{1 - n} {time}^{- 1}$

Thus,
$\begin{array}{r} \Rightarrow ({Lmol}^{- 1}) \Rightarrow 1 - n = - 1 \\ n = 2 \end{array}$

Hence, the correct answer is 2.