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Evaporation of the solution of copper sulfate solution helps in:

1. making the solution concentrated
2. crystallization of copper sulfate
3. both A and B
4. none of these

Correct answer: both A and B

Solution

When water evaporates from copper sulfate solution, the amount of solvent decreases while the solute remains, so the solution becomes more concentrated. If enough water is removed, copper sulfate can separate out as crystals.

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