Presence of dissolved impurities of ______________ is responsible for the red brownish color of water?
Correct answer: C. Iron & manganese
- A. Carbonates
- B. Bi-carbonates
- C. Iron & manganese
- D. Arsenic
Explanation
Dissolved iron and manganese oxidise or precipitate as coloured compounds, producing a red, brown or blackish appearance in water. Carbonates, bicarbonates and arsenic are not the usual cause of this red-brown colour.
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