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(C) The reaction of propyne with water in the presence of $40\% \ H_2SO_4$ and $1\% \ HgSO_4$ is an example of hydration of alkynes. The reaction proc

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Acetone

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(C) The reaction of propyne with water in the presence of $40\% \ H_2SO_4$ and $1\% \ HgSO_4$ is an example of hydration of alkynes. The reaction proceeds via the formation of an enol intermediate: $CH_3-C \equiv CH + H_2O \xrightarrow{H_2SO_4, HgSO_4} CH_3-C(OH)=CH_2$. This enol intermediate undergoes tautomerization to form the more stable ketone,which is acetone: $CH_3-C(OH)=CH_2 \rightarrow CH_3-C(=O)-CH_3$ (Acetone).

When propyne reacts with aqueous $H_2SO_4$ in the presence of $HgSO_4$,the major product is

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