An impure sample of potash alum can be purified by

1. evaporation
2. crystallisation
3. centrifugation
4. filtration

Correct Answer:   (b) crystallisation

Explanation: Crystallisation is the process by which a solid form, where the atoms or molecules are highly organized into a structure known as a crystal. An impure sample of potash alum can be purified by crystalisaton.

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Updated on: 15-Mar-2023

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