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JEE Main levelOne or more correct optionsDifficulty 2 of 3co195

Which of the following reagents convert ethanoic acid into ethanoyl chloride?

A $PCl X_{3}$
B $PCl X_{5}$
Cconc. $HCl$
D $SOCl X_{2}$

Answer: A, B, D

SOCl X_{2}

,

PCl X_{5}

and

PCl X_{3}

all replace

OH

of the acid by

Cl

. Concentrated

HCl

does not, because chloride cannot displace hydroxide from the acid and any acid chloride would be hydrolysed back.

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