CHEMISTRY

JAMB 2006 - Question 19

Chemistry 2006 JAMB Past Questions - Question 19: An example of aliphatic unsaturated hydrocarbon is

Choose the correct answers from the options given.
An example of aliphatic unsaturated hydrocarbon is
A:
B:
C:
D:
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Correct Answer

C

Explanation

An example of an aliphatic unsaturated hydrocarbon is propene. Aliphatic hydrocarbons are classified into two main types: alkanes (saturated hydrocarbons) and alkenes (unsaturated hydrocarbons). Propene is an alkene because it contains a double bond between two carbon atoms in its structure. The other compounds mentioned—pentane, butanol, and benzene—are not aliphatic unsaturated hydrocarbons; they belong to different classes of hydrocarbons.

- Pentane is an aliphatic saturated hydrocarbon (alkane) with the chemical formula C5H12.
- Butanol is an aliphatic saturated alcohol with the chemical formula C4H9OH.
- Propene is an aliphatic unsaturated hydrocarbon (alkene) with the chemical formula C3H6.
- Benzene is an aromatic hydrocarbon with a unique ring structure and the molecular formula C6H6.