Question

Isobutane and n-butane are____________.

• A. Constitutional isomers
• B. Position isomers
• C. Stereoisomers
• D. None of above

Answer 1

The correct option is A Constitutional isomers

Two different molecules which have the same molecular formula are isomers. Isomers which differ in the connectivity of bonds are constitutional isomers, or structural isomers. Isobutane is a constitutional isomer of n-butane.