Question

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

A

sublimation

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B

filtration

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C

evaporation

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D

fractional distillation

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Solution

## The correct option is A sublimationExplanation 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.

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