Which of the following is used to obtain pure copper sulphate in the form of crystals from its saturated solution a evaporation b fractional distillation c distillation d crystallization
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Explanation:
Evaporation because it is used to separate soluble solid from a liquid. For example copper sulphate is soluble in water - it's crystal dissolve in water to form copper sulphate solution . During Evaporation the water evaporates away leaving copper sulphate crystals behind.
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