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Predict the correct intermediate and product in the following reaction:
Explanation
Hg²⁺-catalysed hydration gives an enol that tautomerises to a ketone.
Detailed Solution
$H_3C-C\equiv CH \xrightarrow{H_2O,\ H_2SO_4,\ HgSO_4} H_3C-C(OH)=CH_2$ (A, enol)
$H_3C-C(OH)=CH_2 \xrightarrow{\text{tautomerism}} H_3C-CO-CH_3$ (B, acetone)