A hydrocarbon has hydrogen atoms. Give its molecular formula if its alkyne.
Explanation for correct option:
(B)
So, the number of carbon atoms in the molecular formula is 3. Hence, the molecular formula of alkyne will be .
Explanation for incorrect options:
(A) Methane is a saturated hydrocarbon and it does not have any C-C triple bond thus, it is an alkane not alkyne.
(C) Ethane has C-C single bond thus, it is an alkane not alkyne.
(D) Ethene is an unsaturated hydrocarbon and it has one C-C double bond thus, it is an alkene not alkyne.
Hence, the correct option is (B) i.e. .