passwella.
Menu

JAMB Chemistry 2006 Question 37

Question 37

Separation of Mixtures

The order in which a mixture of sand, ammonium chloride and sodium chloride can be separated is

  1. A.dissolution → dryness → filtration → evaporation
  2. B.filtration → sublimation → evaporation → dryness
  3. C.sublimation → dissolution → filtration → evaporation
  4. D.dissolution → filtration → sublimation → evaporation
Show the answer and explanation

Answer: C (sublimation → dissolution → filtration → evaporation)

Explanation

Heat first to sublime off NH4Cl; dissolve the rest in water; filter off the sand; then evaporate the filtrate to get NaCl.