What is the major product of the following reaction? $CH_3-C \equiv C-CH_2-CH_3 \xrightarrow{1 \ mol \ of \ Cl_2} \text{?}$

Which of the following is a homologue of ethyne?

Ethene can be separated from acetylene by passing the mixture through :

Acetylenic hydrogens are acidic because

Compound $(X)$ [styrene] is subjected to the following sequence of reactions: $(i)$ $Br_2/CHCl_3$, $(ii)$ $NaNH_2$ (excess), $(iii)$ $CH_3I$, $(iv)$ $H_2, Na/NH_3(l)$, giving Major Product $(Y)$. The molar mass of the major product $(Y)$ formed is . . . . . . $\text{g mol}^{-1}$. (Given molar mass in $\text{g mol}^{-1}$: $C:12, H:1$)

The product $(B)$ of the reaction is:
$CH(CO_2H)=CH(CO_2H)$ $\xrightarrow[2 \ mole]{NaOH} (A)$ $\xrightarrow{\text{electrolysis}} (B)$