Q4 of 23 Page 192

Give two examples of gaseous air pollutants.

(a) Carbon monoxide: Carbon monoxide is toxic in nature. On breathing in large amounts of it, it can even lead to death.


(b) Sulphur dioxide: Sulphur dioxide is one of the main constituents of acid rain. These gases also lead to greenhouse effect which in turn contributes to global warming.


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2

Name any four ways to control vehicular air pollution.

 3

Name any two small-scale industries that can be the source of particulate air pollution.

 1

Mention whether the following statements are true (T) or false (F)

(i) Liquid kitchen waste alone constitutes the sewage. (T/F)


(ii) Household detergents are safe and non-contributors to water pollution. (T/F)


(iv) Thermal power plants give out a lot of hot waste water. (T/F)


(v) Hot water discharged into water bodies hardly affects the fish and other aquatic life. (T/F)

 1

Mention whether the following statements are true (T) or false (F)

(i) Soil pollution is largely localized. (T/F)


(ii) Fly ash and metallic ash are examples of urban domestic waste. (T/F)


(iii) Chemical fertilizers may reach the rivers but do not harm the fish. (T/F)


(iv) Biomedical waste may consist of both biodegradable and non-biodegradable waste. (T/F)