In Hell Volhard Zelinsky reaction, the carboxylic acids are halogenated at _ position by using _ and ____.

α

N a O H

, iodine

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α

, phosphorus, halogen

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β

, phosphorus,

H_{2} O

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β

P C l_{5}

N a O H

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Solution

The correct option is B $α$ , phosphorus, halogen
$α$ position.
$R - C H_{2} - C O O H \to P p h_{3}, B r_{2} R - C H B r - C O O H$
Hell Volhard Zelinsky reaction.

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