Which of the following reactions will yield $2, 2-$dibromopropane?

How many carbons are in the simplest alkyne having two side chains?

Which of the following does not give a white precipitate with ammoniacal $AgNO_3$?

The number of $\pi$-bonds in the product formed by passing acetylene through dilute sulphuric acid containing mercuric sulphate is

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 reaction of $1,2-$dibromoethane with alcoholic $KOH$ yields product $X$. What is the hybridization of the carbon atoms in $X$?