The major product obtained by the treatment of propyne with aqueous $H_{2} S O_{4}$ in the presence of $H g S O_{4}$ is:

propanal

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acetone

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propanol

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propyl hydrogen sulphate

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Solution

The correct option is B acetone
The major product obtained by the treatment of propyne with aqueous H2SO4 in the presence of HgSO4 is acetone.
$C H_{3} C \equiv C H H_{2} S O_{4} - --- \to H g S O_{4} C H_{3} C H O H = C H_{2} t a u t o m e r i z a t i o n - --------- \to C H_{3} - C O - C H_{3}$
A molecule of water is added acros carbon carbon tripple bond to forms enol which tautomerizes to ketone.

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