Final answer:
Acetone and Propanal are isomers; they both have the molecular formula C3H6O but different structures, making them structural isomers. Option C is correct.
Step-by-step explanation:
Among the options provided, Acetone & Propanal are a pair of isomers. The common name for propanone is acetone, which is a ketone, while propanal is an aldehyde.
Both compounds have the same molecular formula, C₃H₆O, but they differ in the structure: acetone has a carbonyl group (C=O) bonded to two other carbon atoms, whereas propanal has the carbonyl group at the end of the carbon chain, bonded to at least one hydrogen atom. This difference in structure, while having the same molecular formula, makes them structural isomers with different properties.
In this question, the pair of isomers is Acetone & Propanal.
Isomers are compounds that have the same molecular formula but different structural arrangements.
Acetone (propanone) and propanal (propanaldehyde) have the same chemical formula of C3H6O but differ in the arrangement of atoms, making them isomers.