Physical and Chemical Changes — Science STD 7 — Question
Gujarat BoardEnglish MediumSTD 7SciencePhysical and Chemical Changes2 Marks
Question
Which one is better technique to obtain sugar from sugar solution crystallization or evaporation to dryness?
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Answer
Crystallization is a better technique than evaporation because it has no dissolve impurities that may left in evaporation. So Salt obtain from evaporation is mixed in boiled water. Then solution is filtered to remove dissolved impurities. The filtrate is left undisturbed for few hours. Sodium chloride aggregate and forms pure crystal of salt.
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