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NEET Sample Paper NEET Sample Test Paper-39

  • question_answer
    Which of the following groups of ions makes the water hard?

    A)  Sodium and bicarbonate

    B)  Magnesium and chloride

    C)  Potassium and sulphate

    D)  Ammonium and chloride

    Correct Answer: B

    Solution :

     Temporary hardness is due to the presence of bicarbonates of calcium and magnesium and permanent hardness is due to the sulphates or chlorides of both of calcium and magnesium.


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