Question

Which of the following pairs of substances may best be separated through distillation


A.
sand and soil

B.
water and soil

C.
salt and sand

D.
water and alcohol

Answer 1

Answer:

Chloroform and Ethanol are a pair whose mixture can be completely separated by distillation.

Answer 2

Answer:

The pair of substances which can be best separated through distillation are Water and Alcohol.

Explanation:

Distillation: Distillation is a technique used to separate mixtures of liquid which are non- volatile and have different boiling points.

• In this method, the mixture is heated due to which the substance with low boiling point evaporates first. Further, the evaporated vapour is collected in another cool flask and cooled down to form liquid.
• After the substance with lower boiling is evaporated, only other substances are left in the container.

The boiling point of water is 100° C and that of Alcohol is 78.37°C. Upon heating the mixture of alcohol and water, alcohol evaporates first and the evaporated alcohol is condensed in another flask. In this way , both components of the mixture are separated.