(B) The reaction is $RCl + H_2O \to ROH + HCl$. Since water is present in a large excess,its concentration remains effectively constant throughout the

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Molecularity is $2$,order of reaction is $1$

(B) The reaction is $RCl + H_2O \to ROH + HCl$. Since water is present in a large excess,its concentration remains effectively constant throughout the reaction. Therefore,the rate of the reaction depends only on the concentration of $RCl$,making it a pseudo-first-order reaction,so the order is $1$. Molecularity is defined as the number of reacting species (atoms,ions,or molecules) taking part in an elementary step. Here,both $RCl$ and $H_2O$ are involved in the collision,so the molecularity is $2$.

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

Medium

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

A
Molecularity is $2$,order of reaction is also $2$
B
Molecularity is $2$,order of reaction is $1$
C
Molecularity is $1$,order of reaction is $2$
D
Molecularity is $1$,order of reaction is also $1$

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Class 12 Questions

Class 12

Chemistry Questions

Chapter

Chemical Kinetics

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Rate law , Rate constant , Order of Reaction and Molecularity

State whether the following sentences are true $(T)$ or false $(F)$:
$(a)$ There is more than one reactant in a pseudo first order reaction.
$(b)$ In a pseudo first order reaction,the concentration of both reactants is the same.
$(c)$ In a pseudo first order reaction,the concentration of one reactant is very high.

Medium

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The order of the reaction occurring by the following mechanism should be:
$(i)$ $A_2 \to A + A$ (fast)
$(ii)$ $A + B_2 \to AB + B$ (slow)
$(iii)$ $A + B \to AB$ (fast)

Easy

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The following results are obtained for the reaction $S + Nu \rightarrow \text{product}$. By which reaction mechanism does this reaction occur?

Experiment $[S]$ $[Nu]$ Rate

$1$ $0.1$ $0.1$ $2.2 \times 10^{-3}$

$2$ $0.2$ $0.1$ $4.4 \times 10^{-3}$

$3$ $0.1$ $0.2$ $4.4 \times 10^{-3}$

Experiment	$[S]$	$[Nu]$	Rate
$1$	$0.1$	$0.1$	$2.2 \times 10^{-3}$
$2$	$0.2$	$0.1$	$4.4 \times 10^{-3}$
$3$	$0.1$	$0.2$	$4.4 \times 10^{-3}$

EasyGUJCET 2023

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State a condition under which a bimolecular reaction is kinetically first order reaction.

Easy

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If the concentration of reactant $A$ is increased by $10$ times,the rate of reaction becomes $100$ times. What is the order of reaction if the rate law is,$\text{rate} = k[A]^{x}$?

EasyMHT CET 2020

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

Similar Questions

The order of the reaction occurring by the following mechanism should be:$(i)$ $A_2 \to A + A$ (fast)$(ii)$ $A + B_2 \to AB + B$ (slow)$(iii)$ $A + B \to AB$ (fast)

The following results are obtained for the reaction $S + Nu \rightarrow \text{product}$. By which reaction mechanism does this reaction occur? Experiment $[S]$ $[Nu]$ Rate $1$ $0.1$ $0.1$ $2.2 \times 10^{-3}$ $2$ $0.2$ $0.1$ $4.4 \times 10^{-3}$ $3$ $0.1$ $0.2$ $4.4 \times 10^{-3}$

State a condition under which a bimolecular reaction is kinetically first order reaction.

If the concentration of reactant $A$ is increased by $10$ times,the rate of reaction becomes $100$ times. What is the order of reaction if the rate law is,$\text{rate} = k[A]^{x}$?

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The order of the reaction occurring by the following mechanism should be:
$(i)$ $A_2 \to A + A$ (fast)
$(ii)$ $A + B_2 \to AB + B$ (slow)
$(iii)$ $A + B \to AB$ (fast)

The following results are obtained for the reaction $S + Nu \rightarrow \text{product}$. By which reaction mechanism does this reaction occur?

Experiment $[S]$ $[Nu]$ Rate

$1$ $0.1$ $0.1$ $2.2 \times 10^{-3}$

$2$ $0.2$ $0.1$ $4.4 \times 10^{-3}$

$3$ $0.1$ $0.2$ $4.4 \times 10^{-3}$