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  1. The process of removing calcium and magnesium from hard water is known as

    2. A.

     Sedimentation
    B.

     Filtration
    C.

     Flocculation
    D.

     Water softening

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    Answer : Option D

    Explanation :

    Softening is the process of removing the dissolved calcium and magnesium salts that cause hardness in water. Water softening is achieved either by adding chemicals that form insoluble precipitates or by ion exchange.

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