Question

which type of isomers are they?
1) chain
2) position
3) metamer
4) function group


I know the answer is (4) but can you please explain the different function group there?​

Answer 1

When two compounds have same molecular formula but they differ by functional group attached to them then it is known as functional group isomerism.

Here OH group changes its position. In first compound OH is attached to benzene to form phenol.

On the second compound it is attached to cyclohexane to form cyclohexanol.

So due to change in position of the functional group OH different isomers are generated.

Therefore it is functional isomerisation.

Hope it helps.