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AIIMS2018Chemistry-Organic Chemistry

AIIMS 2018 Chemistry Nomenclature MCQ Question

Type: MCQ-conceptual-Easy-Class 11

Choose the correct.

Question diagram
A

5−Hydroxy cyclohex−3−en−1−one5 - \text{Hydroxy cyclohex} - 3 - \text{en} - 1 - \text{one}

B

3−Hydroxy cyclohex−5−en−1−one3 - \text{Hydroxy cyclohex} - 5 - \text{en} - 1 - \text{one}

C

8−Hydroxy cyclohex−3−en−1−one8 - \text{Hydroxy cyclohex} - 3 - \text{en} - 1 - \text{one}

D

7−Hydroxy cyclohex−5−en−1−one7 - \text{Hydroxy cyclohex} - 5 - \text{en} - 1 - \text{one}

Correct Answer

Option A

Detailed Explanation

The IUPAC name ⁵⁻Hydroxy cyclohex−3x^{-3}-en−1n^{-1}-one accurately describes the compound with a ketone at the first position, a hydroxyl group at the fifth position, and a double bond at the third position of the cyclohexane ring. This nomenclature follows the rules of prioritizing functional groups and correctly indicates the positions of the substituents. Since the other options are not provided, they cannot be evaluated, but they would likely contain inaccuracies in naming or structural representation that do not conform to IUPAC guidelines. Understanding the systematic naming of organic compounds is crucial for clear communication in chemistry.

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