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The reaction \mathrm{2 A+B_2 \rightarrow 2 A B} is an elementary reaction. For a certain quantity of reactants, if the volume of the reaction vessel is reduced by a factor 5, the rate of the reaction increased by a factor of

Option: 1

75 times


Option: 2

50 times


Option: 3

125 times


Option: 4

10 times


Answers (1)

best_answer

\mathrm{\text { Reaction:- } 2 A+B_2 \rightarrow 2 A B}

As the reaction is elementary, the rate of reaction is 

\mathrm{r=k \cdot[A]^2\left[B_2\right]}

On reducing the volume by a factor of 5 , the concentrations of \mathrm{A \ and \ B_2}  will become 5 times and hence, the rate becomes

\mathrm{5^2 \times 5=125 \text { times of initial Rate }}

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