Question

Pentan- 2- one and 3- methylbutan- 2- one are a pair of

• A. Functional isomers
• B. Chain isomers
• C. Positional isomers
• D. Sterioisomers

Answer 1

The correct option is B Chain isomers

Chain isomerism arises due to difference in the arrangement of carbon atom constituting the chain. Both Pentan- 2- one and 3- methylbutan- 2- one have the same molecular formula ${\text{C}}_5{\text{H}}_{10}\text{O}$. Given below are their structure:

Both compounds differ in their chain structure. Therefore, they are chain isomers.