1) Which of the following is mainly responsible for the causes of water pollution? a) Afforestation b) Oil rifeneries c) Paper factories  d) Both b and c 2) Which of the following is the waterborne disease?  a) Typhoid b) Cholera c) Diarrhoea  d) All of the above 3) Which of the following rivers is called the world's most polluted river?  a) Ganga river b) Chenab river c) Cauvery river d) Yamuna river 4) Which of the following are the primary causes of water pollution?  a) Plants b) Animals c) Human activities d) None of these 5) Which of the following is not a waterborne disease?  a) Measles b) Typhoid c) Cholera  d) Hepatitis  6) Bacteria in water causes ___________  a) Malaria b) Typhoid c) Dengue  d) Chicken Guinea  7) Water pollution can be stopped best by  a) Treating effluent to remove injurious chemicals b) Rearing more fishes c) Cultivating useful water plants d) Spraying with DDT 8) Which of the following is biodegradable pollutant  a) Plastic b) DDT c) Sewage d) Polythene

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