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Question

In the presence of a small amount of phosphorous, aliphatic carboxylic acids react with chlorine or bromine to yield a compound in which α - hydrogen has been replaced by halogen. This reaction is known as:

A
Wolff-Kishner reaction
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B
Etard reaction
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C
Hell-Volhard_Zelinsky reaction
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D
Rosenmund reaction
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Solution

The correct option is B Hell-Volhard_Zelinsky reaction
The Hell–Volhard–Zelinsky halogenation reaction halogenates carboxylic acids at the α carbon.

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