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Doctors Medicines MCQs Q&A

Which of the following procedures would you use to separate ammonium chloride from sodium chloride?

Which of the following procedures would you use to separate ammonium chloride from sodium chloride? Correct Answer Sublimation

The correct answer is Sublimation.

Key Points

  • Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage.
    • Example: Snow and ice changing into water vapor in the air without first melting into water.

Important Points

Distillation
  • Distillation is a procedure by which two mixed liquids with different boiling points can be separated.
    • It is an important separation process in chemistry, industry, and food science.
  • Distillation involves boiling a liquid, then condensing the gas and collecting the liquid elsewhere.
  • A liquid is boiled in the "distilling flask", then the vapors travel to another section of the apparatus where they come into contact with a cool surface.
Crystallization
  • It is a process by which a chemical is converted from a liquid solution into a solid crystalline state.
  • Crystallization acts as both separation and purification steps.
  • The crystallization process consists of two major events:
    • Nucleation.
    • Crystal Growth.
Filtration
  • Filtration is the process of separating suspended solid matter from a liquid.
  • The liquid which has passed through the filter is called the filtrate. The filter may be paper, cloth, cotton-wool, asbestos, slag- or glass-wool, unglazed earthenware, sand, or other porous material.

Additional Information

  • The opposite of sublimation is "deposition", where water vapor changes directly into the ice—such as snowflakes and frost.

Related Questions

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