A carboxylic acid is converted into its anhydride using

Thionyl chloride

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Sulphur chloride

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Phosphorus pentoxide

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None of the above

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Solution

The correct option is C Phosphorus pentoxide
Carboxylic acids get converted to acid anhydride in the presence of dehydrating agent like $H^{+} / △$ or $P_{2} O_{5} / △$ . This reaction occurs due to cleavage of
bond between carbonyl C and hydroxyl O.

General reaction is as follows:

A short trick:

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Similar questions

The oxidising agent used to convert alcohols into carboxylic acid is:

Name :
(a) compound formed when acetic acid and ethanol react together.
(b) the reducing agent used to convert acetic acid into ethanol.
(c) the substance used to change acetic acid to acetic anhydride.

Q. A carboxylic acid can be converted to its methyl ester by which of the following method?

Q. Alkaline potassium permanganate and potassium dichromate convert alcohols into carboxylic acids on oxidation.

Alkaline Potassium permanganate and Potassium dichromate convert alcohol into carboxylic acids by adding oxygen.

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A carboxylic acid is converted into its anhydride using

The correct option is C Phosphorus pentoxideCarboxylic acids get converted to acid anhydride in the presence of dehydrating agent like H+/△ or P2O5/△. This reaction occurs due​ to cleavage of​ bond between carbonyl C and hydroxyl O​. General reaction is as follows: A short trick: