Question

Ammonium chloride is separated from a mixture of sodium chloride and ammonium chloride by?

• A. sublimation
• B. filtration
• C. evaporation
• D. fractional distillation

Answer 1

The correct option is A

sublimation

Explanation of correct option:

A. Sublimation

• “A change of state directly from solid to gas without changing into liquid state is called sublimation.
• Ammonium chloride$\left({\mathrm{NH}}_4\mathrm{Cl}\right)$ is separated from a mixture of sodium chloride and ammonium chloride by the method of sublimation.

Explanation of incorrect options:

B. Filtration-"In the filtration technique, the solid impurities are completely taken out of the water through this process."

C. Evaporation-"It is the process in which the surface of a liquid as it changes into the gas phase."

D. Fractional distillation-

• “To separate a mixture of two or more miscible liquids for which the difference in boiling points is less than 25 K, the fractional distillation process is used.”
• Fractional distillation involves the separation of two miscible liquids.

Hence, the correct option is A i.e. sublimation.