Question

Which of the following is not a way to separate the components of a mixture?
A. Evaporation
B. Electrolysis
C. Chromatography
D. Sublimation

Answer 1

Hint: When two or more substances are combined physically without participating in any chemical change, then it is known as a mixture. There are various methods of separation of components of a mixture including filtration, distillation, etc.

Complete answer:
We can separate important components of mixtures using several techniques which are discussed as follows:
Evaporation:
It is a method to separate a mixture which consists of solid solute mixed in a liquid solvent. When the mixture is heated to a certain temperature, the liquid i.e., solvent present in the mixture eventually evaporates and leaves the solute particles behind. Thus, solute particles get separated from the solvent in a mixture.
Chromatography:
It is a laboratory technique used for separation of components from their mixtures. In the process, the mixture is first dissolved in a substance which is termed as mobile phase through which it is carried out to a second substance termed as stationary phase. The speed of each component is different while travelling through the stationary phase and hence are easily separated.
Sublimation:
It is a process in which a solid substance directly converts into its gaseous phase. It can be used to separate the components of mixtures which consist of volatile and non-volatile substances. For example, a mixture of ammonium chloride and salt can be separated using this process.
Therefore among given options, electrolysis is the process which is not used as a method to separate the components of a mixture.
Hence, option (B) is the correct answer.

Note:
Electrolysis is a process which uses electric current to drive a nonspontaneous reaction. Electrolysis is widely used in metallurgical processes like extraction or purification of metals from their ores and in processes like electroplating.