Consider an elementary reaction A(g)+B(g) arrow C(g)+D(g) If the volume of reaction mixture is suddenly reduced to (1)/(3) of its initial volume, the reaction rate will become ' x ' times of the original reaction rate.

Correct answer: C. 9 Since, the reaction is elementary Rate =k[A]^1[B]^1 When V is reduced to (1)/(3) V , concentration will be tripled. Hence, rate =9 ×( rate )_ initial x=9

JEE Main 202528 JanuaryEvening Shift

Exam: JEE Main
Year: 2025
Date: 28 January
Shift: Evening Shift
Subject: Chemistry
Chapter: Chemical Kinetics

JEE Main 2025 · 28 January · Evening Shift · Chemistry · Chemical Kinetics

Consider an elementary reaction A(g)+B(g) arrow C(g)+D(g) If the...

Consider an elementary reaction

\mathrm{A}(\mathrm{g})+\mathrm{B}(\mathrm{g}) \rightarrow \mathrm{C}(\mathrm{g})+\mathrm{D}(\mathrm{g})

If the volume of reaction mixture is suddenly reduced to

\frac{1}{3}

of its initial volume, the reaction rate will become '

x

' times of the original reaction rate. The value of

x

is :

Options

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

Correct answer

C. $9$

Step-by-step solution

Since, the reaction is elementary

\text{ Rate }=k[A]^1[B]^1

When V is reduced to

\frac{1}{3} \mathrm{ V} , concentration will be tripled. Hence, rate

=9 \times(

\text{ rate }

)_{

\text{initial } } x=9

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