(B) For an elementary reaction $A_{(g)} + B_{(g)} \rightarrow C_{(g)} + D_{(g)}$,the rate law is given by $R_1 = k[A][B]$.Since concentration is moles

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

(B) For an elementary reaction $A_{(g)} + B_{(g)} \rightarrow C_{(g)} + D_{(g)}$,the rate law is given by $R_1 = k[A][B]$.Since concentration is moles per unit volume,$R_1 = k \left( \frac{n_A}{V} \right) \left( \frac{n_B}{V} \right) = k \frac{n_A n_B}{V^2}$.When the volume is reduced to $\frac{V}{3}$,the new concentration becomes $3$ times the initial concentration.$R_2 = k [3A][3B] = 9k[A][B]$.Therefore,$R_2 = 9R_1$,which means the rate becomes $9$ times the original rate.Thus,$x = 9$.

Class 12 Chemistry Chemical Kinetics Rate of a reaction

Medium

Consider the elementary reaction $A_{(g)} + B_{(g)} \rightarrow C_{(g)} + D_{(g)}$. If the volume of the reaction mixture is suddenly reduced to $\frac{1}{3}$ of its initial volume,the reaction rate will become '$x$' times the original reaction rate. The value of $x$ is:

JEE MAIN 2025 All JEE MAIN

A
$\frac{1}{9}$
B
$9$
C
$\frac{1}{3}$
D
$3$

Explore More

Browse All

Question Bank

All Subjects

Class 12 Questions

Class 12

Chemistry Questions

Chapter

Chemical Kinetics

Subtopic

Rate of a reaction

Previous Year

JEE MAIN 2025 Paper All JEE MAIN years →

In a reaction,$2 A \rightarrow \text{Products}$,the concentration of $A$ decreases from $0.5 \ mol \ L^{-1}$ to $0.4 \ mol \ L^{-1}$ in $10 \ minutes$. Calculate the rate during this interval?

Medium

View Solution

In the reaction of formation of sulphur trioxide by contact process $2SO_2 + O_2 \rightleftharpoons 2SO_3$,the rate of reaction was measured as $\frac{d[O_2]}{dt} = -2.5 \times 10^{-4} \ mol \ L^{-1} \ s^{-1}$. The rate of reaction in terms of $[SO_2]$ in $mol \ L^{-1} \ s^{-1}$ will be:

DifficultJEE MAIN 2014

View Solution

Consider the following reaction: $2 NO_{2(g)} + F_{2(g)} \longrightarrow 2 NO_2F_{(g)}$. The expression for the rate of reaction in terms of the rate of change of partial pressure of reactant and product is/are:

MediumWBJEE 2013

View Solution

If $3A \to 2B$,then the rate of reaction of $+\frac{d[B]}{dt}$ is equal to

MediumAIPMT 2002

View Solution

If the first order reaction involves gaseous reactants and gaseous products,the units of its rate are:

Easy

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

Consider the elementary reaction $A_{(g)} + B_{(g)} \rightarrow C_{(g)} + D_{(g)}$. If the volume of the reaction mixture is suddenly reduced to $\frac{1}{3}$ of its initial volume,the reaction rate will become '$x$' times the original reaction rate. The value of $x$ is:

Similar Questions

In a reaction,$2 A \rightarrow \text{Products}$,the concentration of $A$ decreases from $0.5 \ mol \ L^{-1}$ to $0.4 \ mol \ L^{-1}$ in $10 \ minutes$. Calculate the rate during this interval?

In the reaction of formation of sulphur trioxide by contact process $2SO_2 + O_2 \rightleftharpoons 2SO_3$,the rate of reaction was measured as $\frac{d[O_2]}{dt} = -2.5 \times 10^{-4} \ mol \ L^{-1} \ s^{-1}$. The rate of reaction in terms of $[SO_2]$ in $mol \ L^{-1} \ s^{-1}$ will be:

Consider the following reaction: $2 NO_{2(g)} + F_{2(g)} \longrightarrow 2 NO_2F_{(g)}$. The expression for the rate of reaction in terms of the rate of change of partial pressure of reactant and product is/are:

If $3A \to 2B$,then the rate of reaction of $+\frac{d[B]}{dt}$ is equal to

If the first order reaction involves gaseous reactants and gaseous products,the units of its rate are:

Vedclass Test Series

Exam Paper Generator

Online Exam Module