a
kill bacteria
b
control the pH of water
c
improve the taste of the water
d
coagulate small pasrticles of mud
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Correct Option
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MECIYA
12 years ago
D ansa is D bcoz chemicals lyk potash alum KA(SO4)2, or sodium aluminate(III), NaAlO2, are added to cause coagulation or flocculation. d impurities clump together to form big particles of dirt or flocs which settle down rapidly.
