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  1. Hardness of the water is commonly measured in terms of

    2. A.

     Calcium carbonate equivalents
    B.

     Calcium sulphate equivalents
    C.

     Magnesium carbonate equivalents
    D.

     Magnesium sulphate equivalents

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    Answer : Option A

    Explanation :

    Hardness of the water is commonly measured in terms of calcium carbonate equivalents.

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