Chemical Engineering MCQs

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

by
Neutralised by alkali treatment
Left as such without any treatment
Diluted with fresh water to reduce its acidity
None of these
✅ The correct answer is option A.