1.

Arrange the steps in a sequence for the removal of microorganisms during the purification of drinking water. (a) Lime feeder (b) Mechanical mixing (c ) Alum feeder (d) Sedimentation tank (e) Passing through gravel and sand (f) Chlorine feederA. c a b d e fB. c b a d e fC. e a b c f dD. a b d c e f

Answer» Correct Answer - A
(i) Alum feeder (ii) Lime feeder
(iii) Mechanical mixing (iv) Sedimentation tank
(v) Passing through gravel and sand (vi) Chlorine feeder


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