Consider following reaction and find the incorrect option(s).

P and Q are stereo isomers and they cannot be separated by fractional distillation

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Q has a higher boiling point than P and they can be separated by fractional distillation

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P and Q are diastereomers and they can be separated by fractional distillation

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Q has a higher melting point than P and they can be separated by chromatography

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Solution

The correct options are
A P and Q are stereo isomers and they cannot be separated by fractional distillation
B Q has a higher boiling point than P and they can be separated by fractional distillation

(a) P and Q are stereo isomers but they can be separated by fractional distillation since both differ in dipole moment and hence the boiling points.
(b) Q is trans and has zero dipole moment so it has a lower boiling point than the cis isomer (P).
(d) The trans isomer has a higher melting point as compared to the cis isomer because of uniform packing.

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