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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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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 :
 

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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 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

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