The compound $X$ on reaction with $HgSO_4 + H_2SO_4$ gives $Y$ which on oxidation gives acetic acid. $X$ is

Two moles of $HBr$ are added to $CH_3-C \equiv CH$ in the presence of peroxide to give:

Which of the following reactions gives $H_2C=C=C=CH_2$?

The hydration of propyne results in the formation of:

$A$ compound $C_5H_8$ gives a white precipitate with ammoniacal $AgNO_3$. It yields $(CH_3)_2CHCOOH$ upon oxidation with hot alkaline $KMnO_4$. The compound is:

Which of the following reactions does not give an alkyne?