Identify the reaction order from each of the following rate constants.

$(i)$ $k=2.3 \times 10^{-5} \,L \,mol ^{-1}\, s ^{-1}$

$(ii)$ $k=3 \times 10^{-4}\, s ^{-1}$

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$(i)$ The unit of second order rate constant is $L \,mol ^{-1} s ^{-1}$, therefore $k=2.3 \times 10^{-5} \,L\, mol ^{-1} \,s ^{-1}$ represents a second order reaction.

$(ii)$ The unit of a first order rate constant is $s^{-1}$ therefore $k=3 \times 10^{-4}\, s ^{-1}$ represents a first order reaction.

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  • [JEE MAIN 2024]

The reaction, $X + 2Y + Z \to  N$ occurs by the following mechanism

$(i)$ $X + Y  \rightleftharpoons  M$             very rapid equilibrium

$(ii)$ $M + Z \to  P$                        slow

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