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(D) When propyne $(CH_3-C \equiv CH)$ is treated with dilute $H_2SO_4$ and $HgSO_4$ (Kucherov reaction),hydration occurs according to Markovnikov's ru

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Propanone

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(D) When propyne $(CH_3-C \equiv CH)$ is treated with dilute $H_2SO_4$ and $HgSO_4$ (Kucherov reaction),hydration occurs according to Markovnikov's rule to form an unstable enol,which then tautomerizes to form propanone (acetone). $CH_3-C \equiv CH + H_2O$ $\xrightarrow{HgSO_4/H_2SO_4} [CH_3-C(OH)=CH_2]$ $\rightarrow CH_3-CO-CH_3$

When propyne is treated with dilute $H_2SO_4$ and $HgSO_4$,the major product is

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