When acetylene reacts with $HCl$ in the presence of $HgCl_2$,the product formed is.........

What is the product formed by the hydration of propyne in the presence of $H_2SO_4$ and $HgSO_4$?

The reagent$(s)$ for the following conversion is/are:
$Br-CH_2-CH_2-Br \xrightarrow{?} HC \equiv CH$

The compound $X \ (C_5H_8)$ reacts with ammoniacal $AgNO_3$ to give a white precipitate and reacts with excess of $KMnO_4$ to give the acid,$(CH_3)_2CHCOOH$. Therefore,$X$ is:

In which of the following,the bond length between the hybridized carbon atom and the other carbon atom is minimum?

The final product of the following reaction is .......
$CaO + 3C$ $\xrightarrow{\text{Heat}} A$ $\xrightarrow{H_2O} B$ $\xrightarrow{H_2SO_4, Hg^{2+}} C$