• # question_answer The compound X on reaction with $HgS{{O}_{4}}+{{H}_{2}}S{{O}_{4}}$ gives Y which on oxidation gives acetic acid. X is [MP PMT 1999] A) ${{C}_{2}}{{H}_{2}}$ B) ${{C}_{2}}{{H}_{4}}$ C) ${{C}_{3}}{{H}_{4}}$ D) ${{C}_{4}}{{H}_{6}}$

$\underset{\text{Ethyne}}{\mathop{CH\equiv CH}}\,+{{H}_{2}}O\underset{{{H}_{2}}S{{O}_{4}}}{\mathop{\xrightarrow{HgS{{O}_{4}}}}}\,\underset{\text{Vinyl}\,\text{alcohol}}{\mathop{C{{H}_{2}}=CH-OH}}\,\xrightarrow{KMn{{O}_{4}}}$$C{{H}_{3}}CHO\xrightarrow{\text{Oxidation}}\underset{\text{Acetic}\,\,\,\text{acid}}{\mathop{C{{H}_{3}}COOH}}\,$