1.

The material which is added to water during purification process at the water works so as to disinfect it is : (a) potassium permanganate (b) betadine (c) chlorine (d) potash alum

Answer»

The material which is added to water during purification process at the water works so as to disinfect it is :

(a) potassium permanganate (b) betadine (c) chlorine (d) potash alum



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