NEET UG CHEMISTRY MCQ: BIOMOLECULES

1 Hard

1 of 1

Application +4 | -1

An optically active compound

A

, gave an

\left[ \alpha \right]_\mathrm{D}^{25} = 30^\circ ,

while a mixture of A and its enantiomer B, gave

\left[ \alpha \right]_\mathrm{D}^{25} = + 15^\circ .

The ratio of

A

and

B

in the mixture is

View answer and explanation

Correct option: B

3 to 1

Option B (3 to 1) is correct because the observed rotation is +15°, while pure A has +30°. This means there's an excess of A over B, and the ratio can be calculated using the formula for optical purity.

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