MCQs on Water Pollution

  1. Which of the following rivers is called the world’s most polluted river?
  2. (a) Ganga River

    (b) Chenab River

    (c) Cauvery River

    (d) Yamuna River

    Sol: (a) Ganga River.

  3. Which of the following are the primary causes of water pollution?
  4. (a) Plants

    (b) Animals

    (c) Human activities

    (d) None of these

    Sol: (c) Human activities.

  5. Which of the following techniques is used for reducing the total dissolved solids (TDS) in the water?
  6. (a) Osmosis

    (b) Ion exchange

    (c) Distillation

    (d) Both b and c

    Sol: (d) Both b and c.

  7. Which of the following statements are true about CNG -Compressed natural gas?
  8. (a) It is a clean fuel

    (b) It is a harmful fuel

    (c) It is a polluting fuel

    (d) All of the above

    Sol: (a) It is a clean fuel.

  9. Which of the following salts is the main cause of permanent hardness of water?
  10. (a) Magnesium sulphate

    (b) Magnesium bicarbonate

    (c) Magnesium carbonate

    (d) None of the above

    Sol: (a) Magnesium sulphate.

  11. Which of the following is mainly responsible for the causes of water pollution?
  12. (a) Afforestation

    (b) Oil refineries

    (c) Paper factories

    (d) Both b and c

    Sol: (d) Both b and c.

  13. Chlorofluorocarbon are nonflammable chemicals mainly used in _________.
  14. (a) Perfumes

    (b) Refrigerators

    (c) Air conditioners

    (d) All of the above

    Sol:(d) All of the above.

  15. Which of the following techniques is used to determine the concentration of odour compounds in the given water sample?
  16. (a) Settling

    (b) Flushing

    (c) Stripping

    (d) Chlorination

    Sol: (c) Stripping.

  17. What is the health effects of excess fluoride in drinking water?
  18. (a) Fluorosis

    (b) Toothaches

    (c) Lung disease

    (d) Intestinal infection

    Sol: (a) Fluorosis.

  19. Which of the following techniques is used to remove fluorides from the water bodies?
  20. (a) Osmosis

    (b) Ion exchange

    (c) Lime softening

    (d) Both b and c

    Sol: (d) Both b and c.

  21. Which of the following is a waterborne disease?
  22. (a) Typhoid

    (b) Cholera

    (c) Diarrhoea

    (d) All of the above

    Sol: (d) All of the above

  23. The main sources of Arsenic in water are ________.
  24. (a) Floods

    (b) Fertilizers

    (c) Industrial waste

    (d) Both b and c

    Sol: (d) Both b and c.

  25. In most freshwater lakes, the algal productivity is limited by the availability of which of the following inorganic ions?
  26. (a) Carbon

    (b) Nitrogen

    (c) Phosphorus

    (d) All of the above

    Sol: (c) Phosphorus.

  27. Which of the following diseases or infections is caused due to poor water hygiene?
  28. (a) Leprosy

    (b) Trachoma

    (c) Conjunctivitis

    (d) All of the above

    Sol: (d) All of the above.

  29. Which of the following statements is true about the composition of Calcium Carbonate (CaCo3) in soft water?
  30. (a) 0 to 30 milligrams of CaCO3 per litre

    (b) 30 to 60 milligrams of CaCO3 per litre

    (c) 60 to 90 milligrams of CaCO3 per litre

    (d) 90 to 120 milligrams of CaCO3 per litre

    Sol: (b) 30 to 60 milligrams of CaCO3 per litre.

  31. Which of the following salts are the main causes of temporary hardness?
  32. (a) Calcium sulphate

    (b) Magnesium sulphate

    (c) Magnesium chloride

    (d) Magnesium carbonate

    Sol: (d) Magnesium carbonate.

  33. According to the Geological survey, water with less than 1000 ml/litre of total dissolved solids is __________.
  34. (a) Brine water

    (b) Freshwater

    (c) Slightly saline

    (d) Moderately saline

    Sol: (b) Freshwater

  35. The amount of dissolved solids passing through the filters in the process of filtration is called __________.
  36. (a) Independent of suspended solids

    (b) Sum of total solids and suspended solids

    (c) Difference between total solids and suspended solids

    (d) All of the above

    Sol: (c) Difference between total solids and suspended solids.

  37. Which of the following units is used for measuring the turbidity of water?
  38. (a) EAU Formazin Attenuation Units

    (b) FNU- Formazin Nephelometric Unit

    (c) NTU – Nephelometric Turbidity Units

    (d) All of the above

    Sol: (d) All of the above.

  39. Which of the following is not a waterborne disease?
  40. (a) Measles

    (b) Typhoid

    (c) Cholera

    (d) Hepatitis

    Sol: (a) Measles.

Also Refer: MCQs on Air Pollution

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