AIIMS 2019 Chemistry IUPAC Nomenclature MCQ Question
Assertion : The name of the hydrocarbon is 2,5-dimethylheptane and not 3,6-dimethylheptane.
Reason : Numbering should be done in such a way that the sum of the locants on the parent chain is the biggest possible number.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
In organic chemistry, when numbering the carbon chain of a branched alkane, the numbering begins from the terminal carbon that is closest to a substituent or branching point. This ensures that the substituents receive the lowest possible numbers, which is a fundamental rule in IUPAC nomenclature. Option C correctly identifies this principle, while options A and B do not provide relevant information or context, making them incorrect. Understanding this concept is crucial for accurately naming organic compounds and recognizing their structure.
Found an issue with this question?