Question

Would cyclohexanone be a methyl ketone?

Answer 1

Ketones are a category of functional groups that are grouped with aldehydes and called carbonyl compounds. Cyclohexanone is a cyclic carbonyl compound containing six carbon atoms that are connected to each through single bonds and one of the carbon atoms is double bonded to oxygen.

Complete answer:
The class of organic compounds that contain carbon atoms double bonded to oxygen atoms and the other valency being satisfied by either hydrogens $(H - C = O)$ or hydrocarbon chains $( - C = O)$ are called carbonyl compounds.
If the functional group is attached to a terminal position with one side of the carbonyl carbon blocked by a hydrogen atom, it is called an aldehyde and if the carbonyl group contains alkyl chains on both sides then it is called a ketone.
Cyclohexanone is a six-membered cyclic ketone that is symmetric on both the ends, as the carbon atoms in a cyclic compound are connected in the form of a ring.
A methyl ketone is a special ketone that must contain at least one methyl group on one of its sides. Compounds like acetone that have methyl groups directly attached to the carbonyl carbon are examples of methyl ketones.
$\Rightarrow$ The carbonyl group in cyclohexanone is itself part of a ring and is not directly connected to any methyl group on either side, therefore it is not a methyl ketone.

Note:
It is essential to identify methyl ketones as only methyl ketones and compounds that can be oxidized to a methyl ketone give a positive iodoform test. This test results in the formation of a yellow precipitate of iodoform only when the reactant is a methyl ketone.