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NEET UG CHEMISTRY MCQ: ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES AND TECHNIQUES

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(+)-Mandelic acid has a specific rotation of

158^{\circ}

. What is the observed specific rotation of a mixture of

25 \%(-)-

mandelic acid and

75 \%(+)

- mandelic acid?

View answer and explanation

Correct option: D

+79^{\circ}

Option D (+79°) is correct because the observed specific rotation is calculated based on the enantiomeric excess (ee) and the specific rotation of the pure enantiomer.

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The number of different substitution products possible when ethane is allowed to react with bromine is sunlight are : Correct order of stability is Assertion (A) A mixture of o-nitrophenol and p-nitrophenol can be separated by steam distillation.

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p

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a) Phenol

\quad \quad

b) 3-Nitrophenol

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\quad

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