A) ethanoic acid
B) propionic acid
C) Lso-butyric acid
D) trichloroacetic acid
Correct Answer: D
Solution :
When carboxylic acids containing an\[\alpha -H\] atom are treated with\[C{{l}_{2}}/B{{r}_{2}}\]in the presence of red P,\[\alpha -\]halocarboxylic acids are obtained. The reaction is called Hell-Volhard-Zelinsky reaction. Here, it is also clear that this reaction is given by only those compounds that contain adeast one\[\alpha H\]atom. Hence, trichloroacetic acid\[(CC{{l}_{3}}COOH)\]due to the absence of\[\alpha H\]atom, does not give HVZ reaction.
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