GATE CY Stereochemistry PYQs & Answers

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Questions 1–10 of 33. Imported answers require independent review unless marked reviewed.

Topic practice 33 questionsPage 1 of 4

The correct statement about the following quaternary ammonium ion is

Your answerChoose one option.

It has only C₂-symmetry, hence chiral

It has S₄-symmetry, hence achiral

It has no symmetry, hence chiral

It has a centre of symmetry, hence achiral

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The reaction(s) that give(s) meso-1,2-diphenylethane-1,2-diol as the major product is(are)

Your answerSelect all correct options. You can choose more than one.

Diagram for Chemistry question 22 (figure 2)

Diagram for Chemistry question 22 (figure 3)

Diagram for Chemistry question 22 (figure 4)

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In the ¹H NMR spectrum of compound X, the coupling constant (Jₐᵦ) between Hₐ and Hᵦ is 3 Hz. The amino alcohol(s) that give(s) X on reaction with methyl iodide followed by heating is(are)

Your answerSelect all correct options. You can choose more than one.

Diagram for Chemistry question 23 (figure 2)

Diagram for Chemistry question 23 (figure 3)

Diagram for Chemistry question 23 (figure 4)

Diagram for Chemistry question 23 (figure 5)

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The difference in the number of gauche interactions present in diaxial and diequatorial chair conformations of trans-1,2-dimethylcyclohexane is _____ (in integer).

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The specific rotation of enantiomerically pure (S)-2-butanol is +14°. The specific rotation of enantiomeric mixture of 2-butanol obtained from an asymmetric reduction of 2-butanone is found to be +7°. The percentage of (R)-2-butanol present in the reaction mixture is ______ (in integer).

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