11th Class Chemistry Hydrogen & Its Compounds / हाइड्रोजन और इसके यौगिक

  • question_answer 27)
    What causes the temporary and permanent hardness of water?

    Answer:

    Presence of bicarbonates of magnesium and calcium in water causes temporary hardness while the presence of chlorides and sulphates of magnesium and calcium in water causes permanent hardness.


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