An aldehyde and a ketone can be represented by the same molecular formula, say `C_3H_6O`. Write their structures and name them. State the relation between the two in the language of science.

Explanation

(i) Propanal (aldehyde),
`H-underset(H)underset(|)overset(H)overset(|)(C )-underset(H)underset(|)overset(H)overset(|)(C )-overset(H)overset(|)(C )=O`
(ii) Propanone (Ketone),
`H--underset(H)underset(|)overset(H)overset(|)(C )-underset(O)underset(||)(C)-underset(H)underset(|)overset(H)overset(|)(C )-H`
(iii) Isomers (same molecular formula but different structural formula/different functional group).