22 Which method of separation is used to obtain pure salt from a mixture of salt, sand and water?
A boiling then filtering
B evaporating then condensing
C filtering then evaporating
D filtering then sieving

C filtering then evaporating

Explanation:

This is because you will separate salt in filtration and then as salt dissolves in water, so you need to evaporate in order to get it back.

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the answer is 303.15 or 303