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9th Class Science Is Matter Around Us Pure Question Bank MCQs - Is Matter Around us Pure

  • question_answer
    A mixture contains four solid compounds P, Q, R and S. On heating, R changes to vapour state. It can be separated from rest of the solids by

    A) sublimation

    B) filtration

    C) crystallisation

    D) distillation

    Correct Answer: A

    Solution :

    [a] Sublimation methods of purification is used for those solids which are directly converted to gas phase without undergoing liquid phase. So, R is separated from rest of the solids by sublimation.


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