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Question

Which reaction is used for the preparation of $$\alpha - $$ Bromoacetic acid ?


A
Kolbe’s Reaction
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B
Reimer-Tiemann Reaction
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C
Hell volhard Zelinsky Reaction
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D
Perkin’s Reation
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Solution

The correct option is D Hell volhard Zelinsky Reaction
When $$Cl_2$$ or $$Br_2$$ is react with carboxylic acid in the presence of red phosphorus then  $$\alpha -$$  hydrogen of carboxylic acid
is replaced by $$Cl$$ or $$Br$$

$$CH_3COOH\xrightarrow[]{Br_2}CH_2BrCOOH$$
Aceticacid              $$\alpha -$$ bromo acetic acid

This reaction is known as Hell Volhard Zelinsky reaction

Chemistry

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