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Pseudo First Order Reaction - Practice Questions & MCQ

Edited By admin | Updated on Sep 18, 2023 18:35 AM | #JEE Main

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  • 8 Questions around this concept.

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Rate of reaction, \mathrm{ A+2 B \rightarrow Product~ is =k[B]^2[A]} . If B is taken in large excess, then the order of reaction is:

The value of rate constant of a pseudo first order reaction ____________.

Which of the following is true for pseudo - first-order reaction :

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Concepts Covered - 1

Pseudo Order Reaction

If one reactant is present in large excess a 2nd order reaction is converted to 1st order reaction. This is called a pseudo-first-order reaction.

acid catalyzed hydrolysis of ester

$\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}_2+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{CH}_3 \mathrm{COOH}+\mathrm{CH}_3 \mathrm{OH}$

This reaction is first order with respect to ester. The 2nd-order reaction with respect to that reactant has been taken in more amounts. For example:

$\begin{aligned} & r=k\left[\mathrm{CH}_3 \mathrm{CO}_2 \mathrm{CH}_3\right]\left[\mathrm{H}_2 \mathrm{O}\right]=k^{\prime}\left[\mathrm{CH}_3 \mathrm{CO}_2 \mathrm{CH}_3\right] \\ & k\left[\mathrm{H}_2 \mathrm{O}\right]=k^{\prime}\end{aligned}$ 

 

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Pseudo Order Reaction

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