In the course of purifying water for town supply the water is passed through large settlings tanks, containing sodium aluminate (III) to remove?
- large particles
- germs
-
fine particles
- odour
The correct answer is: C
Explanation
Potash alum [kAl(S\({O}_4\))\(_2\)] n sodium aluminate (ii) (NaHCO\(_2\)) are added to cause coagulation.
As fine particles to clump together, forming large particles heavy enough to settle at the bottom of the tanks as impurities.
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