Which of the following is usually not a water pollutant?
(a) sewage
(b) fertiliser
(c) fly ash
(d) pesticide
Which of the following is not an air pollutant?
(a) Sulphur dioxide
(b) Sewage
(c) CFCs
(d) SPM
Question 8
Which of the following is a part of inorganic impurities of the sewage? (a) Pesticides (b) Urea (c) Phosphates (d) Vegetable waste