The general formula of an alkyne is:

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

When propyne is passed through a red hot iron tube at $873 \ K$,the reaction gives a product having the molecular formula of:

In the reaction $CaC_2 + H_2O \to A \xrightarrow{H_2SO_4/HgSO_4} B$,what are $A$ and $B$?

The following reaction is an example of a ....... reaction: $CH_2Br-CH_2Br + 2KOH (alc.) \xrightarrow{\Delta} CH \equiv CH + 2KBr + 2H_2O$

Give the structure,formula and names of $2$ to $4$ carbon alkynes.