MCQs on Water Pollution and Noise Pollution

By: Prof. Dr. Fazal Rehman | Last updated: May 23, 2025

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1. : The minimum value of DO required for water to be pure is:





2. : Which value of COD will indicate more polluted water?





3. : Biodegradable pollutant is:





4. : Water is often treated with chlorine to:





5. : Permanent hardness of water is due to





6. : Temporary hard water is softened on industrial scale by adding





7. : Permanent hard water is softened by addition of





8. : Water pollution is due to





9. : Water is often treated with chlorine to





10. : The presence of which in drinking water is responsible for mottling of teeth?





11. : Which water requires zero hardness?





12. : Which process is not physical in nature?





13. : Which is not a physical characteristic of water?





14. : Which is not a chemical characteristic of water?





15. : Which is not a biological characteristic of water?





16. : Which compounds have fishy odor?





17. : Which oxidizing agent is aidful and used in COD test?





18. : Ground water is threatened with pollution from which kind of wastes?





19. : Which statement is not true regarding harmful effects of ground water pollution?





20. : Which statement is not related with the effect of thermal pollution?





21. : Which statement is not true regarding radioactive pollutants?





22. : Which techniques are aidful and used for minimizing water pollution?





23. : The expected specific waste of food industry is





24. : The expected specific wastes of textile industry is





25. : Which of the following is the expected specific waste of paper and allied products industry?





26. : Which disposal method is aidful and used for municipal wastes?





27. : Which of the following is the Chief source of water and soil pollution?





28. : Eutrophication is process which involves ______





29. : Which cause pollution?





30. : Disease caused by eating fish found in water contaminated with industrial waste having mercury is





31. : Maximum desirable concentration of fluorides according to international standard is





32. : Fish die in water bodies polluted by sewage due to Which of the following?





33. : Drained sewage has B.O.D.





34. : Which is a mode of controlling pollution in big cities?





35. : Domestic waste mostly constitutes





36. : Detergents are known to pollute rivers and water ways. However, detergents can be made biodegradable and pollution free by taking





37. : Which factors aid to measure quality of water?





38. : In the purification of portable water the coagulant aidful and used is:





39. : Which statements is not related with principal requisites of water for industrial purposes?





40. : Which of the following is the water that easily forms a lather of films and froths when agitated with a soap solution?





41. : Which of the following is the water that does not form a lather of films when agitated with a soap solution?





42. : BOD refers to:





43. : Phosphate pollution is caused by:





44. : Which substance not present in acid rain?





45. : Water pollution is mainly due to which?





46. : COD refers to:





47. : Spraying of DDT produces pollution of:





48. : Fluorosis, the bone disease, is caused by the presence of:





49. : The hardness of water is because of the presence of dissolved soluble salts of:





50. : Which statement is not true regarding hardness of water?





51. : Temporary hardness of water is due to:





52. : Which environmental problem could lead to a rise in sea level?





53. : Which of following is not a type of pollution for water bodies?





54. : EPA stands for?





55. : ISO stands for?





56. : Which pollutants does not leave a residue?





57. : In plant noise control, which method is aidful and used for reducing noise?





58. : The maximum noise level at which a man can work for hours is:





59. : The unit of sound pressure level is:





60. : The range of sound pressure for uncomfortable level is:





61. : Which is non-auditory effect of noise on human body?





62. : Which is/are non-point source(s) of water pollution?





63. : Which is/are source(s) of water pollution?





64. : Which is/are causes of eutrophication?





65. : Which statements is/are true with regard to the effect of eutrophication?





66. : Which steps is/are involved in the primary treatment of wastewater?





67. : Which materials is/are POP?





68. : Which materials is/are POP?





69. : Which molds secrete aflatoxins which are poisonous and cancer causing chemicals?





70. : Which steps is/are involved in the secondary treatment of wastewater?





71. : The dissolved organic matter of the wastewater is removed by biological process involving bacteria. This step is related to which treatment of wastewater:





72. : Which treatment is the best for degradation of organic/colloidal matter of wastewater?





73. : Tertiary treatment is generally aidful and used to treat which?





74. : Which is/are causes of soil/land pollution?





75. : Which treatment is/are effective in controlling soil/land pollution?





76. : Which statements is/are true regarding green chemistry?





77. : Which statements is/are true regarding green chemistry?





78. : Which statements is/are true regarding green chemistry?





79. : Which materials is/are carcinogen?





80. : The range of sound pressure which is painful is:





81. : Human hearing is sensitive to frequency in the range of about:





82. : A high frequency sound has frequency:





 

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