Multiple choice

Which of the following sets of methods is used to separate the mixture of salt, water and sand?

  1. Sedimentation and filtration

  2. Sublimation, filtration and evaporation

  3. Filtration, evaporation and condensation

  4. Decantation and crystallisation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Salt is soluble in water but sand is not. Sand being heavier settles at the bottom and can be separated by filtering the mixture. Salt and water can be separated by evaporation as water will evaporate leaving the salt behind. The water vapours can be collected by condensation. So, the methods involved in separating the mixture of sand, water and salt are filtration, evaporation and condensation. 

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