Question

A hydrocarbon has four carbon atoms. Give its molecular formula if it is an alkene.
(a) C4H10
(b) C4H8
(C) C4H6
(d) C4H4

Answer 1

Answer:

C4H4

Explanation:

SO THE CORRECT OPTION IS C

Answer 2

The correct option is b.

• Alkene is a type of hydrocarbon.
• Alkene contains a carbon-carbon double bond.
• The general formula of an alkene is $C_nH_{2n}$.
• Here the number of carbon atoms is 4 that is n=4.
• So, the number of hydrogen atoms will be-
• 2×n
• 2×4=8
• Thus this hydrocarbon contains four carbon atoms and eight oxygen atoms.
• Thus its molecular formula will be $C_4H_8$.