Question

The number of isomers of C₄H₁₈ is ______.

Options

• 2

• 3

• 4

• 5

Answer 1

The number of isomers of C₄H₁₈ is 5.

Explanation:

There are 5 structural (constitutional) isomers for \(\text{C}_4\text{H}_8\): three open-chain alkenes (But-1-ene, But-2-ene, and 2-methylpropene) and two cyclic cycloalkanes (Cyclobutane and Methylcyclopropane).