Question

A mixture of ammonium chloride and sand can be separated by:

• A. Decantation
• B. Sublimation
• C. Evaporation
• D. Centrifugation

Answer 1

The correct option is B

Sublimation

The explanation for the correct options:

Option (B) Sublimation:

1. Separating a mixture of sodium chloride and ammonium chloride can be done in a variety of ways. Crystallization, filtering, and sublimation are all options. Sublimation separation is the simplest of the three methods.
2. Sublimation is the process of converting a solid substance into its vapors when heated and then back to a solid when cooled.

The explanation for the incorrect options:

Option(A) Decantation:

• Decantation is a method of separating mixtures by removing a clear liquid layer or solids deposited from a solution. Ex. Kerosene and Water.

Option (C) Evaporation:

• Water evaporation is the transformation of a liquid into a gas or vapor.

Option (D) Centrifugation:

• Centrifugation is a technique for separating molecules with various densities in solution by spinning them at high speeds around an axis (in a centrifuge rotor). Ex. the process of removing fat from milk in order to make skimmed milk. Ex. Copper sulfate is water-soluble.

Hence, option (B) Sublimation is the correct answer.