A) \[\underset{CH{{(C{{H}_{3}}COO)}_{2}}}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}}\,\]
B) \[\underset{CH{{(C{{H}_{3}}COO)}_{2}}}{\mathop{\overset{CH{{(C{{H}_{3}}COO)}_{2}}}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}}\,\]
C) \[\underset{C{{H}_{2}}(C{{H}_{3}}COO)}{\mathop{\overset{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}}\,\]
D) None of these
Correct Answer: A
Solution :
Reaction of acetic acid with acetylene is catalysed by Hg2+ salts. \[HC\equiv CH\underset{Hg{{(OOCC{{H}_{3}})}_{2}}}{\mathop{\xrightarrow{C{{H}_{3}}COOH}}}\,\underset{\text{vinyl acetate}}{\mathop{C{{H}_{2}}=CHOOCC{{H}_{3}}}}\,\] \[\underset{Hg{{(OOCC{{H}_{3}})}_{2}}}{\mathop{\xrightarrow{C{{H}_{3}}COOH}}}\,\underset{\text{ethylidene diacetate}}{\mathop{C{{H}_{3}}-CH{{(OOCC{{H}_{3}})}_{2}}}}\,\]
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