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Benzoic acid reacts with phosphorus pentachloride to give ________

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in Chemistry – Class 12 by (188k points)
Benzoic acid reacts with phosphorus pentachloride to give ________

(a) chlorobenzene

(b) benzyl chloride

(c) benzoyl chloride

(d) chlorobenzoic acid

This question was posed to me in an online quiz.

My doubt stems from Carboxylic Acids Chemical Reactions in division Aldehydes, Ketones and Carboxylic Acids of Chemistry – Class 12

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Right answer is (c) benzoyl chloride

For explanation: The hydroxyl group (OH) of benzoic acid id easily replaced by chlorine atom on treatment with PCl5. This results in the formation of C6H5COCl, or benzoyl chloride.

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