The homologue of ethyne is

Explain the polymerization of alkynes. Or,give the types of polymerization of alkynes and provide a note on each.

$CH_3COOH$ is reacted with $CH \equiv CH$ in the presence of $Hg^{2+}$,the product is:

Which of the following does not react with ammoniacal silver nitrate solution?

Heating a mixture of silver powder and $CHCl_3$ yields which compound?

$A$ hydrocarbon $X$ with molecular formula $C_4H_6$ decolourises bromine water and forms a white precipitate in ethanolic $AgNO_3$ solution. Treatment of $X$ with $HgCl_2$ in aqueous $H_2SO_4$ produces a compound,which gives a yellow precipitate when treated with $I_2$ and $NaOH$. The structure of $X$ is