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Pseudo First Order Reaction MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

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2 Questions around this concept.

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Sucrose is converted to a mixture of glucose and fructose in a pseudo first order process under alkaline conditions. The reaction has a half life of $25.4 \mathrm{~min}$ . The time required for the reduction of a $4.0 \mathrm{mM}$ sample of sucrose to $1.0 \mathrm{mM}$ is :

A

$50.78 \mathrm{~min}$

B

$170.4 \mathrm{~min}$

C

$85.2 \mathrm{~min}$

D

$227.2 \mathrm{~min}$

Concepts Covered - 1

Pseudo Order Reaction

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

acid catalysed hydrolysis of ester

$C_{3}H_{6}O_{2}+H_{2}O\rightarrow CH_{3}COOH+CH_{3}OH$

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

$r=k[CH_{3}CO_{2}CH_{3}][H_{2}O]$ $=k^{'}[CH_{3}CO_{2}CH_{3}]$

$k[H_{2}O]=k^{'}$

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Pseudo Order Reaction

Study other Related Concepts

Pseudo First Order Reaction Current Topic

Rate of Reaction

Order of Reaction

Zero Order Reaction

First Order Reaction

Second Order Reaction

nth Order Reaction

Methods of Determining Reaction Order

Molecularity of reaction

Pseudo First Order Reaction

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