1.

Disinfection of water done by- *Chlorineultra violet raysAlumall of them​

Answer»

Answer:

all of them

is the correct answer.

Explanation:

Chlorination, ozone, ultraviolet light, and chloramines are PRIMARY methods for disinfection. HOWEVER, potassium permanganate, photocatalytic disinfection, nanofiltration, and CHLORINE DIOXIDE can also be USED. Organic material is naturally present in water.

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