Question

How many structural isomers containing a benzene ring are possible for C₈H₁₈?

Answer 1

There can not be any structural isomers of C₈H₁₈ containing a benzene ring. This is because the formula given does not have any unsaturation. The compound which have the formula C₈H₁₈ has no double or triple bond. This is a saturated compound. A benzene ring can not be formed by this formula.