Which of the following solution pairs can be separated by fractional distillation?

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H2O + HNO3

H2O + HCl

Benzene + toluene

C2H5OH + H2O

answer is B.

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Detailed Solution

H2O+HNO3 --- Maximum boiling azeotropeH2O+HCl --- Maximum boiling azeotropeH2O+C2H5OH --- Minimum boiling azeotropeIt is not possible to separate azeotropic mixture by fractional distillation.At certain composition both the components boil at the same temperatureThey form constant boiling mixturesBenzene + toluene is an ideal sol.The mixture can be separated by fractional distillation as they do not formConstant boiling mixture

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