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JIPMER 2010

Exam: JIPMER
Year: 2010
Subject: Chemistry
Chapter: Alcohols Phenols and Ethers

JIPMER 2010 · Chemistry · Alcohols Phenols and Ethers

Ethyl alcohol reacts with thionyl chloride to give

Ethyl alcohol reacts with thionyl chloride to give

Options

A $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Cl}+\mathrm{HCl}$
B $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Cl}+\mathrm{H}_2 \mathrm{O}+\mathrm{SO}_2$
C $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Cl}+\mathrm{HCl}+\mathrm{SO}_2$
D $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Cl}+\mathrm{SO}_2+\mathrm{Cl}_2$

Correct answer

C. $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Cl}+\mathrm{HCl}+\mathrm{SO}_2$

Step-by-step solution

\underset{\text{ ethyl alcohol }}{\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}}+\underset{\substack{\text{ thionyl } \\ \text{ chloride }}}{\mathrm{SOCl}_2} \rightarrow \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Cl}+\mathrm{HCl}+\mathrm{SO}_2 \uparrow

This method is preferred for the preparation of alkyl halide because both by product of the reaction ( ie,

\mathrm{SO}_2

and HCl ) are gases and can easily escape leaving behind pure alkyl halide.

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