NEETChemistryGeneral Organic Chemistry
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Propan-1-ol and Propan-2-ol are considered metamers of each other. Reason (R): Metamerism arises due to different alkyl chains on either side of the polyvalent functional group. In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
D. (A) is not correct but (R) is correct
Step-by-step solution
Assertion (A) is not correct because Propan-1-ol ( CH ₃ CH ₂ CH ₂ OH ) and Propan-2-ol ( CH ₃ CH(OH)CH ₃ ) differ only in the position of the - OH group on the carbon chain. They are position isomers, not metamers. Furthermore, the hydroxyl group ( - OH ) is a monovalent functional group and cannot exhibit metamerism. Reason (R) is correct as it states the exact definition of metamerism according to NCERT. Metamerism occurs when isomers have the same molecular formula but differ in the nature of the alkyl groups at