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Discussion :: Chemistry

  1. The two metal ions that cause hardness to water are:

  2. A.

     Calcium, Magnesium

    B.

     Sodium, Calcium

    C.

     Sodium, Potassium

    D.

     Sodium, Magnesium

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    Answer : Option A

    Explanation :

    Calcium and magnesium ion cause hardness of water.


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