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Discussion :: Chemistry

  1. Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water.

    2. A.

     Magnesium
    B.

     Calcium
    C.

     Manganese
    D.

     None of these

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    Answer : Option D

    Explanation :

    Brown stains in vessels and clothes generally indicate the presence of high quantities of iron. It causes reddish-brown staining of laundry, porcelain, dishes, utensils and even glassware. Manganese acts in a similar way but causes a brownish-black stain. Soaps and detergents do not remove these stains.

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