Question

How many structural isomers of pentane, having molecular formula \( C_5H_{12} \) are possible?

• A. 2
• B. 3
• C. 4
• D. 5

Hint:

Structural isomerism occurs when compounds have the same molecular formula but differ in the connectivity of their atoms.

Answer 1

The Correct Option is C

Pentane (\( C_5H_{12} \)) has four structural isomers, namely: 1. n-pentane 2. isopentane (2-methylbutane) 3. neopentane (2,2-dimethylpropane) 4. 3-methylbutane These are the only four possible structural isomers for pentane.