(A) The general unit for the rate constant of a reaction of order $n$ is $(mol \, L^{-1})^{1-n} \, sec^{-1}$.For a first order reaction $(n = 1)$,the

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(A) The general unit for the rate constant of a reaction of order $n$ is $(mol \, L^{-1})^{1-n} \, sec^{-1}$.For a first order reaction $(n = 1)$,the unit is $(mol \, L^{-1})^{1-1} \, sec^{-1} = sec^{-1}$.For a zero order reaction $(n = 0)$,the unit is $(mol \, L^{-1})^{1-0} \, sec^{-1} = mol \, L^{-1} \, sec^{-1}$,which is equivalent to $M \, sec^{-1}$ since $M = mol \, L^{-1}$.Therefore,the units are $sec^{-1}$ and $M \, sec^{-1}$ respectively.

Class 12 Chemistry Chemical Kinetics Rate law , Rate constant , Order of Reaction and Molecularity

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Units of rate constant of first and zero order reactions in terms of molarity $M$ unit are respectively

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A
$sec^{-1}, \, M \, sec^{-1}$
B
$sec^{-1}, \, M$
C
$M \, sec^{-1}, \, sec^{-1}$
D
$M, \, sec^{-1}$

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Chemical Kinetics

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Rate law , Rate constant , Order of Reaction and Molecularity

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In a reaction involving hydrolysis of an organic chloride in the presence of a large excess of water,$RCl + H_2O \to ROH + HCl$.

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For a reaction $A + B \longrightarrow P$,the following data are provided. The rate constant for this reaction in standard units is:
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$1$ $0.02$ $0.02$ $2 \times 10^{-2}$
$2$ $0.02$ $0.04$ $4 \times 10^{-2}$
$3$ $0.04$ $0.04$ $8 \times 10^{-2}$

Entry	$[A]$ in $M$	$[B]$ in $M$	Initial rate $(M/s)$
$1$	$0.02$	$0.02$	$2 \times 10^{-2}$
$2$	$0.02$	$0.04$	$4 \times 10^{-2}$
$3$	$0.04$	$0.04$	$8 \times 10^{-2}$

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For the reaction,$H_{2(g)} + Br_{2(g)} \longrightarrow 2 HBr_{(g)}$,$r = k[H_2][Br_2]^{\frac{1}{2}}$. What is the molecularity and order of reaction respectively?

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The order of a reaction can have:

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Units of rate constant of first and zero order reactions in terms of molarity $M$ unit are respectively

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In a reaction involving hydrolysis of an organic chloride in the presence of a large excess of water,$RCl + H_2O \to ROH + HCl$.

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For a reaction $A + B \longrightarrow P$,the following data are provided. The rate constant for this reaction in standard units is:
Entry $[A]$ in $M$ $[B]$ in $M$ Initial rate $(M/s)$
$1$ $0.02$ $0.02$ $2 \times 10^{-2}$
$2$ $0.02$ $0.04$ $4 \times 10^{-2}$
$3$ $0.04$ $0.04$ $8 \times 10^{-2}$