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Secondary SchoolChemistry 10+5 pts


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

1. river
2. all harmful waste are directly disposed to river
3. organic and in organic pollutants including macroscopic pollutants like plastic waste
4. biochemical oxygen demand
5.Fluorosis is a disease caused by water that contains high amount of fluoride 
6. chlorine has property to purify water which remove toxic components