(c) Give the names and structural formulae of one saturated cyclic hydrocarbon and one unsaturated cyclic hydrocarbon.

(d) Give one example of a hydrocarbon, other than pentane, having more than three isomers.

Solution:

(c) Saturated cyclic hydrocarbon: Cyclohexane C₆H₁₂

Unsaturated Cyclic hydrocarbon: Benzene C₆H₆

(d) Hexane C₆H₁₄