A) Acetyl chloride
B) a-chloro acetic acid
C) Trichloro acetic acid
D) Chloral
Correct Answer: B
Solution :
In presence of red phosphorus, acids give a-substituted acids, on heating. It is called Hell-Volhard Zclinsky reaction (HVZ). \[\underset{\alpha -chloro\,acrtic\,acid}{\mathop{C{{H}_{3}}COOH\xrightarrow[\operatorname{Re}d.P]{C{{l}_{2}}}\overset{Cl}{\mathop{\overset{|}{\mathop{C{{H}_{2}}}}\,}}\,-COOH}}\,\]
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