Separation Method | MCQs

Explanation

Vacuum distillation is used to distill substances at lower temperatures by reducing the pressure, which lowers the boiling point of the substances.

Explanation

The comparative rates at which solutes move in paper chromatography depend on Rf values. 

Rf values (retention factors) represent the ratio of the distance traveled by a solute to the distance traveled by the solvent front on the paper.

Since different solutes have different polarities and affinities for the mobile and stationary phases, they will travel at different speeds, resulting in unique Rf values.

Therefore, the comparative movement of solutes is directly related to their Rf values. 

Explanation

• Filtration is the process of separating an insoluble solid from a liquid by passing the mixture through a filter paper or a porous material.
• The solid particles are retained by the filter.
• While the liquid passes through, resulting in a clear separation of the two.