The method of separating a mixture of soluble solids by dissolving them in a suitable hot solvent and then lowering the temperature slowly is called:
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Correct answer: A
Explanation
The correct answer is option 1 i.e. fractional crystallisation.
- Fractional crystallization involves dissolving a mixture of soluble solids in a hot solvent and then cooling the solution slowly.
- As the temperature decreases, different substances crystallize out of the solution at different rates, allowing for their separation based on their solubility differences.
- This technique is used to purify and separate components of a mixture effectively.