1.

Consider the following impurities:i) CO2 and H2Sii) Finely divided suspended matteriii) Disease-causing bacteriaiv) Excess alkalinityThe correct sequence of the removal of these impurities in a water treatment plant is –

A. i) ii) iii) iv)
B. i) iv) iii) ii)
C. i) iv) ii) iii)
D. iv) i) iii) ii)
Answer» D. iv) i) iii) ii)


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