Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly _____________ substances?
Correct answer: C. Inorganic
- A. Radioactive
- B. Organic
- C. Inorganic
- D. None of these
Explanation
Electroplating, blast-furnace and coal-mining effluents mainly contain inorganic pollutants such as metal ions, acids, alkalis and mineral solids. They are not primarily wastes of biodegradable organic matter or radioactive materials.
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