A) Acetyl chloride
B) \[\alpha \]-chloro acetic acid
C) Acetic anhydride
D) Chloral
Correct Answer: B
Solution :
Key Idea: In presence of red phosphorus, acids having a-hydrogen atom give a-substituted acids. This reaction is called Hell-Vollhard Zeiinsky \[(HVZ)\] reaction. \[C{{H}_{3}}COOH+C{{l}_{2}}\xrightarrow{\operatorname{Re}d\,P}\,\,\underset{\alpha \,\,-chloro\text{ }acetic\text{ }acid}{\mathop{\overset{\begin{smallmatrix} Cl \\ | \end{smallmatrix}}{\mathop{C}}\,{{H}_{2}}COOH}}\,\]
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