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JIPMER 2017

Exam: JIPMER
Year: 2017
Subject: Chemistry
Chapter: Alcohols Phenols and Ethers

JIPMER 2017 · Chemistry · Alcohols Phenols and Ethers

Aqueous 10 \% NaHCO_3 solution is used as a reagent for identifying...

Aqueous

10 \% \mathrm{NaHCO}_3

solution is used as a reagent for identifying '

A

'. Which of the following compounds yield '

A

' on hydrolysis?

Options

A $\mathrm{CH}_3 \mathrm{COOC}_2 \mathrm{H}_5$
B $\mathrm{C}_2 \mathrm{H}_5-\mathrm{COO}-\mathrm{C}_2 \mathrm{H}_5$
C $\mathrm{CH}_3 \mathrm{CHO}$
D $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}$

Correct answer

A. $\mathrm{CH}_3 \mathrm{COOC}_2 \mathrm{H}_5$

Step-by-step solution

\mathrm{NaHCO}_3

is basic in nature so it is used in the identification of acid only. In the given compound only ester

\left(\mathrm{CH}_3 \mathrm{COOC}_2 \mathrm{H}_5\right)

on hydrolysis gives acid as

\underset{\text{ Ethyl acetate }}{\mathrm{CH}_3 \mathrm{COOC}_2 \mathrm{H}_5}+\mathrm{H}_2 \mathrm{O} \longrightarrow \underset{\text{ Acetic acid }}{\mathrm{CH}_3 \mathrm{COOH}} +\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH} (Ethyl alcohol)

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