Which of the following happens when the temperature of the saturated copper sulphate solution is increased?

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The colour of the solution changes.

Its solubility is increased

It becomes a saturated solution

The solubility decreases.

answer is C.

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Detailed Solution

When a saturated copper sulphate ( $CuS O_{4}$ ) solution is heated at high temperature the solubility of copper sulphate in its solution increases and due to which it becomes an unsaturated solution. This happens because with rise in temperature the solubility of any solid in its solution increases. Always a solution prepared at higher temperature contains more dissolved solids in it than at lower temperature. Due to more solubility at higher temperature, the solution changes from saturated to unsaturated solution.

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