The final product obtained by heating ethyne in the presence of $HgSO_4$ and dilute $H_2SO_4$ at $333 \ K$ is .........

Explain the acidic nature of ethyne.

Give the main product of the following reactions:
$(i)$ $1,1,2,2-$tetrabromopropane + zinc powder in methanol.
$(ii)$ Reaction occurring on passing hydrogen gas through carbon electrodes at high temperature in an electric arc.

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

Ethyne on reaction with water in the presence of $HgSO_4$ and $H_2SO_4$ gives

Benzene is the polymer of