Water Pollution MCQ for NEET Biology With Answers

Water pollution MCQ:  Water pollution refers to the contamination of water bodies such as lakes, rivers, oceans, and groundwater by harmful substances. This environmental issue poses a significant threat to both aquatic life and human health. Various factors contribute to water pollution, including industrial activities, agriculture practices, improper waste disposal, oil spills, and sewage discharge.

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Water Pollution MCQ

Q.1 High concentrations of accumulated DDT in birds

1. kills pathogens in their blood
2. causes sterility by affecting gametogenesis
3. leads to the premature breaking of eggs
4. causes spasticity of the muscles of the body

 Q 2. Eutrophication is often seen in

1. freshwater lakes
2. Ocean
3. mountains
4. Deserts

Q 3. The natural ageing of a lake by biological enrichment is known as:

1. Eutrophication
2. Biomagnification
3. Bioremediation
4. Biofortification

Q 4. Examples of integrated wastewater treatment include

1. Biologists at the town of Arcata and Humboldt State University on California's North Shore
2. A biologist at Bangalore City and Humboldt State University
3. A biologist at New York City and Purdue University on California's North Coast
4. The town of Arcata on California's North Shore and Purdue University of Biologists

Q 5. The natural aging of a lake

1. Depends on climate
2. Depends on the size of the lake
3. May take thousands of years
4. All of these

Q 6. Photo Electro Chemical (PEC) solar cells are based on

1. Only inorganic semiconductors
2. Only organic semiconductors
3. Only crystal silicon semiconductor
4. Electrolyte and inorganic semiconductor hybrid structure

Q 7. Photoelectrochemical decomposition of water is done to

1. To produce hydrogen
2. To remove pathogens from water
3. To remove metals from water
4. To remove oil and grease from water

Q 9. Which of the following substances is not a water pollutant?

1. Chromium
2. Silt
3. Glacier
4. Arsenic

Q 10. Streams draining into the lake introduce nutrients such as .... (Young Lake)

1. Nitrogen and Phosphorus
2. DDT and cadmium
3. DDT
4. Calcium

Q 11. There was a significant decline in bird populations in an area where DDT had been extensively used because

1. Birds stopped laying eggs
2. Earthworms in the area got eradicated
3. Cobras were feeding exclusively on birds
4. Birds laid eggs and the eggs hatched early

Q 12. In rivers with domestic sewage rich in organic waste, the following may happen

1. increased population of aquatic food web organisms
2. an increased production of fish due to biodegradable nutrients
3. death of fish due to lack of oxygen
4. Algal blooms will cause the river to dry very soon

Q 13. Which of the following is not associated with Eco-san toilets?

1. Are working in Sri Lanka and Kerala
2. Composting method for recycling of human excreta
3. Recycled material forms natural fertilizer
4. Enhance the need for chemical fertilizers

Q 14. The formation of London smog takes place in

1. Winter during night time
2. Summer during daytime
3. Summer during the morning time
4. Winter during morning time

Q 15. If the lake is covered with algae, it will smell bad and the water will be undrinkable. Here's why the lake got into this state:

1. Eutrophication.
2. Excess of oxalate ions in water.
3. Excess of non-biodegradable waste in water.
4. Excess of photosynthesis.

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