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AIPMT PRELIMS2003Chemistry-Stereochemistry

AIPMT PRELIMS 2003 Chemistry Enantiomers MCQ Question

Type: MCQ-conceptual-Medium-Class 11

Which of the following pairs of compounds are enantiomers:

A

CH3∣H−C−OH∣HO−C−H∣CH3\begin{array}{c} \text{CH}_3 \\ | \\ \text{H} - \text{C} - \text{OH} \\ | \\ \text{HO} - \text{C} - \text{H} \\ | \\ \text{CH}_3 \end{array} and CH3∣HO−C−H∣H−C−OH∣CH3\begin{array}{c} \text{CH}_3 \\ | \\ \text{HO} - \text{C} - \text{H} \\ | \\ \text{H} - \text{C} - \text{OH} \\ | \\ \text{CH}_3 \end{array}

B

CH3∣H−C−OH∣HO−C−H∣CH3\begin{array}{c} \text{CH}_3 \\ | \\ \text{H} - \text{C} - \text{OH} \\ | \\ \text{HO} - \text{C} - \text{H} \\ | \\ \text{CH}_3 \end{array} and CH3∣HO−C−H∣HO−C−H∣CH3\begin{array}{c} \text{CH}_3 \\ | \\ \text{HO} - \text{C} - \text{H} \\ | \\ \text{HO} - \text{C} - \text{H} \\ | \\ \text{CH}_3 \end{array}

C

CH3∣H−C−OH∣HO−C−H∣CH3\begin{array}{c} \text{CH}_3 \\ | \\ \text{H} - \text{C} - \text{OH} \\ | \\ \text{HO} - \text{C} - \text{H} \\ | \\ \text{CH}_3 \end{array} and CH3∣H−C−OH∣H−C−OH∣CH3\begin{array}{c} \text{CH}_3 \\ | \\ \text{H} - \text{C} - \text{OH} \\ | \\ \text{H} - \text{C} - \text{OH} \\ | \\ \text{CH}_3 \end{array}

D

CH3∣HO−C−H∣H−C−OH∣CH3\begin{array}{c} \text{CH}_3 \\ | \\ \text{HO} - \text{C} - \text{H} \\ | \\ \text{H} - \text{C} - \text{OH} \\ | \\ \text{CH}_3 \end{array} and CH3∣HO−C−H∣HO−C−H∣CH3\begin{array}{c} \text{CH}_3 \\ | \\ \text{HO} - \text{C} - \text{H} \\ | \\ \text{HO} - \text{C} - \text{H} \\ | \\ \text{CH}_3 \end{array}

Correct Answer

Option A

Detailed Explanation

Enantiomers are stereoisomers that are non-superimposable mirror images of each other. Option (1) shows such a pair.

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