Question

Which of the following mixture can be separated completely by the process of sublimation ?
(1) fine sand and cane sugar
(2) sodium chloride and potassium permanganate
(3) potassium chloride and ammonium chloride
(4) barium chloride and sodium sulphate

Answer 1

Potassium chloride and ammonium chloride mixture can be separated completely by the process of sublimation.

Therefore the correct answer is option 3.

Explanation:

• If the solid phase changes directly into the gas phase when heated, this is called sublimation.

• Therefore, with the following options, particularly potassium chloride and ammonium chloride can be separated by sublimation, because the ammonium chloride changes immediately toward the gas phase during heating.

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