Environmental Science Quiz: Water Pollution

What is the definition of water pollution?

• When water becomes unfit for any useful purpose due to man's activities

• When water evaporates due to heat

• When water freezes into ice

• When water is purified for drinking

Which type of pollution has a definite source and place where it enters the water?

• Point source pollution

• Noise pollution

• Non point source pollution

• Air pollution

What is the greater threat to human life in terms of water pollution?

• Ground water pollution

• Surface water pollution

• Air pollution

• Soil pollution

What is an indicator of the level of pollution caused by organic wastes?

• BOD (Biochemical Oxygen Demand)

• COD (Chemical Oxygen Demand)

• TOC (Total Organic Carbon)

• TDS (Total Dissolved Solids)

Which type of chemicals are harmful to aquatic life and human life?

• Water insoluble inorganic chemicals

• Water soluble inorganic chemicals

• Water insoluble organic chemicals

• Water soluble organic chemicals

What is the process by which a body of water acquires a high concentration of nutrients, especially phosphates and nitrates?

• Eutrophication

• Desalination

• Filtration

• Distillation

What is the increase in concentration of a substance in a food chain as a consequence of low rate of internal degradation/excretion of the substance?

• Biomagnification

• Bioremediation

• Bioaccumulation

• Biodegradation

Which disease is caused due to mercury poisoning of water?

• Malaria

• Cholera

• Dengue

• Minamata disease

What is the process whereby certain substances move up the food chain and are eaten by aquatic organisms, leading to concentration in tissues or internal organs?

• Bioremediation

• Bioaccumulation

• Biodegradation

• Biomagnification

Which method of treating polluted water involves passing efluent through a bed of soil with wetland plants to aerobically oxidize the organic matter?

• Root zone treatment

• Reverse osmosis

• Chlorination

• UV disinfection