Question

Constant boiling mixtures are known as :

• A. Distillators
• B. Constant compounds
• C. Azeotropes
• D. Woulfe's compounds

Answer 1

The correct option is C

Azeotropes

Explanation for correct option:

(C) Azeotropes:

The constant boiling mixtures are:

• The constant boiling mixtures are those mixtures which oil at a constant temperature.
• They have their boiling point slightly above or below the boiling point of its components.
• Their boiling point remains same in the liquid as well as in gaseous phase.
• Such liquids are called azeotropes.
• Therefore, option (C) azeotropes is the correct option as they are constantly boiling mixtures.

Explanation for incorrect option:

(A) Distillators:

Distillators refer to the machine used for distillation.

(B) Constant compounds:

The azeotropes are the constant boiling mixtures and not constant compounds.

(D) Woulfe's compounds:

Woulfe’s compound do not have a constant boiling point even in the vapour phase.