An unsaturated hydrocarbon having a triple covalent bond has 50 hydrogen atoms in its molecules. The number of carbon atoms in its molecule will be

Hydro carbons with carbon triple bonds are called alkynes with general formula ${\text{C}}_{\text{n}}{\text{H}}_{2n-2}$, where  $n=2,3,4$----- etc.

Given that  ${{\text{H}}_2}_{n-2}=50$

$\Rightarrow 2n=52$

$\Rightarrow n=26$

$\therefore$  No. of carbon atoms  $n=26$