JEE Main20266 April 2026Morning ShiftChemistryGeneral Organic ChemistryActual
Given below are two statements: Statement I: 2,6 -diethylcyclohexanone and 6 -methyl- 2 -n-propylcyclohexanone are metamers. Statement II: 2,2,6,6 -tetramethylcyclohexanone exhibits keto-enol tautomerism. In the light of the above statements, choose the correct answer from the options given below
Options
- ABoth Statement I and Statement II are true
- BBoth Statement I and Statement II are false
- CStatement I is true but Statement II is false
- DStatement I is false but Statement II is true
Correct answer
C. Statement I is true but Statement II is false
Step-by-step solution
Statement I: Metamerism arises due to different alkyl chains on either side of a polyvalent functional group. In ketones, the carbonyl group ( >C=O ) acts as the polyvalent functional group. In 2,6 -diethylcyclohexanone, the alkyl groups attached to the -carbons are two ethyl groups. In 6 -methyl- 2 -n-propylcyclohexanone, the alkyl groups are a methyl group and an n-propyl group. Since the alkyl groups around the carbonyl group are different while the molecular formula remains the same, they are metamers. Thus, St