ICSE Class 9 Answered

i.         Alcohol and water

 Fractional distillation

ii.       Calcium carbonate and calcium chloride

Calcium chloride is water soluble and calcium carbonate is insoluble.

Calcium carbonate can be separated by filtration and calcium chloride can be later obtained by evaporation.

iii.     Oil and water

Separating funnel

iv.     Carbon KNO₃ and sulphur

Potassium nitrate is soluble in water, sulphur is soluble in carbon disulphide and carbon is insoluble in both the solvents.

v.       Sodium chloride and potassium nitrate

 Sodium chloride is completely soluble in cold water at 10⁰C and potassium nitrate is less soluble at 10⁰C. So by lowering the temperature of the solution mixture in the range of 5⁰C - 8⁰C, potassium nitrate will first crystallize out. The potassium nitrate crystals can be separated by filtration. Sodium chloride still soluble in water can be later obtained by the process of evaporation.