Question

Visit nearby place collect the water from different sources such as river, well, handpump etc. and noted down difference in water quality (i) Which one is more polluted water? (ii) How industrialization is responsible for water pollution? (iii) Name the water pollutant. (iv) What is BOD? (v) How does excess fluoride ion affect us? (vi) Why is the chlorination of water done before drinking?

Answer 1

river is more polluted . industries release chemicals into nearby lakes.