Question

2.
Which of the following statement is incorrect?
(A) During distillation, water vapourises and changes into water in condenser
(B) During distillation, in the condenser, water evaporates
(C) During distillation, hot water is used to run along the condenser
(D)during distillation, the thermometer is not
necessary​

Answer 1

Answer:

Distillation is a process in which water vapourises into steam which is then condensed. Distillation requires controlled heating, therefore, thermometer is required. In condenser water is condensed down using cold water running along the condenser tube.

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Answer 2

The incorrect statement among the given statements is B - during distillation, in the condenser, water evaporates.

• Distillation is a process of separating two or more components of a solid-liquid or a liquid-liquid mixture by selective vaporization followed by subsequent condensation of the components.
• Option A is correct as, during distillation, water vaporizes and again changes into water form in the condenser.
• Option B is incorrect as, during distillation the water doesn't evaporate but rather condenses in the condenser.
• Option C is correct as during distillation, the water vapor is run along the condenser to condense it.
• Option D is correct as a thermometer is used to keep a check on the temperature of the mixture during distillation.

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