Question

Propanone and Propanal are :

• A. Position isomers
• B. Functional isomers
• C. Chain isomers
• D. Geometrical isomers

Answer 1

The Correct Option is B

• Propanone (CH₃COCH₃) is a ketone, while Propanal (CH₃CH₂CHO) is an aldehyde.
• Although both compounds have the same molecular formula (C₃H₆O), they differ in the functional groups they contain: propanone has a carbonyl group (C=O) bonded to two carbon atoms (as part of a ketone), while propanal has a carbonyl group (C=O) bonded to a hydrogen atom and a carbon atom (as part of an aldehyde).
• Functional isomers are compounds that have the same molecular formula but different functional groups.

Thus, Propanone and Propanal are functional isomers, making option (B) the correct answer.

Answer 2

• Propanone (C₃H₆O) is a ketone, and Propanal (C₃H₆O) is an aldehyde.
• Functional isomers are compounds that have the same molecular formula but different functional groups.
• Here, both compounds have the same molecular formula (C₃H₆O) but differ in their functional groups (one is a ketone and the other is an aldehyde). 
• Therefore, they are functional isomers.