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Q.

The compound X on reaction with ${HgSO}_{4} + H_{2} {SO}_{4}$ gives Y, which on oxidation gives acetic acid. X is

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a

$C_{2} H_{2}$

b

$C_{2} H_{4}$

c

$C_{3} H_{4}$

d

$C_{4} H_{6}$

answer is A.

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Detailed Solution

$\begin{aligned} \underset{Ethyne}{CH} \equiv CH + H_{2} O \to_{H_{2} {SO}_{4}}^{{HgSO}_{4}} \underset{vinyl alcohol}{{CH}_{2} = CH - OH} \overset{{KMnO}_{4}}{\to} {CH}_{3} CHO \overset{oxidation}{\to} \underset{acetic acid}{{CH}_{3} COOH} \end{aligned}$

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The compound X on reaction with HgSO4+H2SO4 gives Y, which on oxidation gives acetic acid. X is