Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is (A) Neutralised by alkali treatment (B) Left as such without any treatment (C) Diluted with fresh water to reduce its acidity (D) None of these

Coal mines drainage waste water (acidic in nature) results from the
earth's water percolating through the voids created in coal bed during
mining. This polluted water which either drains out naturally to water
courses or are removed before starting the mining is
(A) Neutralised by alkali treatment
(B) Left as such without any treatment
(C) Diluted with fresh water to reduce its acidity
(D) None of these
by

1 Answer

Answer :

(A) Neutralised by alkali treatment
by

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