Question

what is the relation between aldehyde and ketone

Answer 1

In ketones: The other side of the carbon in the carbonyl group is also bonded to an R group (can be the same kind or a different kind of a carbon-hydrogen chain).In aldehydes: The other side of the carbon in the carbonyl group is always bonded to just Hydrogen.

Answer 2

a ketone is an organic compound with the structure RC(=O)R', where R and R' can be a variety of carbon-containing substituents. Ketones and aldehydes are simple compounds that contain a carbonyl group (a carbon-oxygen double bond).