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Home Questions 89K7Q5JDSX
Target Exam

CUET

Subject

Chemistry

Chapter

Physical: Solutions

Question:

Azeotropes are binary mixtures having

Options:

Same composition in liquid and vapor phase, constant boiling temperature and they cannot be separated by fractional distillation.

The same composition in the liquid and vapor phase, constant boiling temperature and they can be separated by distillation.

The same composition in the liquid and vapor phase, constant boiling temperature, they cannot be separated by fractional distillation and have equal volume of the two liquids.

Constant boiling temperature, they can be separated by fractional distillation and have equal volumes of two liquids.

Correct Answer:

Same composition in liquid and vapor phase, constant boiling temperature and they cannot be separated by fractional distillation.

Explanation:

The correct answer is Option (1) → Same composition in liquid and vapor phase, constant boiling temperature and they cannot be separated by fractional distillation.

Azeotropes are special mixtures of two liquids that:

  • Have the same composition in liquid and vapor phase
  • Boil at a constant temperature (either lower or higher than the boiling points of the individual components)
  • Cannot be separated by fractional distillation because the vapor has the same composition as the liquid (To break an azeotrope, special techniques like azeotropic distillation (adding an entrainer) or pressure swing distillation are required.)

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