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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

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 chlorideNH4Cl is separated from a mixture of sodium chloride and ammonium chloride by the method of sublimation.
How to separate a mixture of a salt and ammonium chloride

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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