Is Matter Around Us Pure ? — Science STD 9 — Question
Rajasthan BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure ?1 Mark
Question
To obtain a solid from its solution, which technique is better, evaporation or crystallisation?
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Answer
Crystallization is a process that separates a pure solid in the form of its crystals from a solution.
Crystallization is better than evaporation because during
Evaporation:
Some solids decompose or some, like sugar may get charred on heating to dryness.
Some impurities may remain dissolved in the solution even after.
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