In the following reaction:C_2H_2 xrightarrow[ | vedclass

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(D) The reaction of acetylene $(C_2H_2)$ with water in the presence of $HgSO_4$ and $H_2SO_4$ is an electrophilic addition reaction.First,water adds a

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$CH_2=CH-OH$

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(D) The reaction of acetylene $(C_2H_2)$ with water in the presence of $HgSO_4$ and $H_2SO_4$ is an electrophilic addition reaction.First,water adds across the triple bond to form an unstable intermediate called vinyl alcohol $(CH_2=CH-OH)$.This intermediate $(x)$ undergoes rapid tautomerization to form the more stable aldehyde,acetaldehyde $(CH_3-CHO)$.Therefore,$(x)$ is $CH_2=CH-OH$.

In the following reaction:
$C_2H_2$ $\xrightarrow[HgSO_4 / H_2SO_4]{H_2O} (x)$ $\xrightarrow{\text{Tautomerisation}} CH_3-CHO$
$(x)$ is $:-$

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In the following reaction:$C_2H_2$ $\xrightarrow[HgSO_4 / H_2SO_4]{H_2O} (x)$ $\xrightarrow{\text{Tautomerisation}} CH_3-CHO$$(x)$ is $:-$