. In sewage, nitrates and phosphates are


In sewage, nitrates and phosphates are-

(a) Organic impurities.

(b) Inorganic impurities.

(c) Both of them.

(d) None of them.

 

 

Best Answer

Ans: (b)

 

Explanation: Sewage contains organic and inorganic impurities. Organic impurities include human faeces, urea, etc. while inorganic impurities include nitrates, phosphates and metals.

 

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