Question

Pure copper sulphate can be obtained from an impure sample by the process of :

(a) evaporation (b) fractional distillation (c) centrifugation (d) crystallisation

Answer 1

option d is correct

The pure copper sulphate can be obtained from an impure sample using recrystallization in which the impure sample is dissolved in a suitable solvent and heated in a water bath and allowed to stand. After some time, pure crystals were seen to grow from that solution. These crystals are pure enough and the process is called recrystallization since it involves obtaining copper sulphate crystals from impure copper sulphate crystals or compound.