Question

9. Which of the following mixtures cannot be separated by using water as solvent followed by filtration and evaporation? a) Sand and sugar c) salt and chalk powder b) Sand and Sulphur d) copper sulphate and sand

Answer 1

Explanation:

It's option a- sand and sugar

Answer 2

A mixture of Sand and Sulphur cannot be separated by using water as a solvent followed by filtration and evaporation. (Option b)

• On using water as a solvent, all those elements which are soluble can be separated from the one that is not soluble in water.
• Salt, Sugar, and Copper Sulphate are water-soluble and hence, can be separated from sand or chalk powder by filtration and evaporation.
• But either Sulphur or sand cannot be dissolved in water and cannot be separated.