Water Pollution
Chemistry ⇒ Environmental Chemistry
Water Pollution starts at 9 and continues till grade 12.
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See sample questions for grade 12
A river receives untreated sewage from a nearby town. Explain the likely changes in BOD and DO levels downstream.
Describe how microplastics contribute to water pollution and their impact on aquatic ecosystems.
Describe one method for the removal of heavy metals from industrial wastewater.
Describe the impact of thermal pollution on aquatic life.
Describe the role of government regulations in controlling water pollution.
Explain how pesticides used in agriculture can lead to water pollution.
A river receives untreated sewage from a nearby town. Explain the likely changes in BOD and DO levels downstream.
A sample of river water has a BOD of 8 mg/L. Is this water considered polluted? (Yes/No)
What is the main chemical used for disinfection in water treatment plants? (1) Chlorine (2) Ammonia (3) Nitrogen (4) Oxygen
Which of the following is a biological method for water treatment? (1) Activated sludge process (2) Chlorination (3) Coagulation (4) Filtration
Which of the following is a common method for the removal of oil from polluted water? (1) Skimming (2) Chlorination (3) Coagulation (4) Aeration
Which of the following is a consequence of water pollution on human health? (1) Respiratory diseases (2) Waterborne diseases (3) Skin cancer (4) None of the above
Fill in the blank: The chemical formula for ozone, a disinfectant used in water treatment, is __________.
Fill in the blank: The maximum permissible limit of fluoride in drinking water as per WHO guidelines is __________ mg/L.
Fill in the blank: The presence of __________ in water can cause blue baby syndrome in infants.
Fill in the blank: The process of removing salt from seawater to obtain fresh water is called __________.
A sample of river water has a BOD of 8 mg/L. Is this water considered polluted? (Yes/No)
True or False: Arsenic contamination in groundwater is a major health concern in some regions.
True or False: Eutrophication is caused by excessive nutrients in water bodies.
True or False: Mercury pollution in water can lead to Minamata disease.
