Which of the following gases,when passed thro | vedclass

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(D) The reaction of acetylene $(C_2H_2)$ with water in the presence of $HgSO_4$ and dilute $H_2SO_4$ is known as Kucherov's reaction. First,acetylene

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$C_2H_2$

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(D) The reaction of acetylene $(C_2H_2)$ with water in the presence of $HgSO_4$ and dilute $H_2SO_4$ is known as Kucherov's reaction. First,acetylene undergoes hydration to form an unstable intermediate called vinyl alcohol $(CH_2=CH-OH)$. This vinyl alcohol then undergoes tautomerization to form a more stable isomer,acetaldehyde $(CH_3CHO)$. The overall reaction is: $HC \equiv CH + H_2O \xrightarrow{HgSO_4 / H_2SO_4} [CH_2=CH-OH] \rightleftharpoons CH_3CHO$.

Which of the following gases,when passed through a warm dilute solution of $H_2SO_4$ in the presence of $HgSO_4$,gives acetaldehyde?

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