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प्रश्न
Salt can be separated from its solution (salt dissolved in water), because
विकल्प
mixing of salt in water is a change that can be reversed by heating and melting of salt
mixing of salt in water is a change that cannot be reversed
mixing of salt in water is a permanent change
mixing of salt in water is a change that can be reversed by evaporation.
उत्तर
mixing of salt in water is a change that can be reversed by evaporation.
Explanation -
Salt can be separated from its water solution by evaporating the water. Hence mixing of salt in water is a reversible change.
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