Water Pollution and Its Effects

Dr. Minakshi Mahar discusses water pollution, its types, and sources. She explains the significance of water, the impact of human activities on water quality, and categorizes pollutants into degradable and non-degradable. The lecture covers surface water pollution, point and non-point sources, and various anthropogenic sources like domestic, industrial, and agricultural waste. The session concludes with a summary of the discussed topics.

What percentage of Earth's water is available for drinking purposes?

• 5%

• 2%

• 3%

• 1%

Which of the following is an example of an inorganic chemical pollutant?

• Detergents

• Pesticides

• Acids

• Plastics

What is a characteristic of point source pollution?

• It is difficult to identify

• It is always natural

• It originates from multiple sources

• It comes from a single, identifiable source

Which type of pollutant is broken down quickly by natural processes?

• Non-degradable pollutants

• Slowly degradable pollutants

• Rapidly degradable pollutants

• Synthetic organic chemicals

Which of the following is a non-degradable pollutant?

• Domestic sewage

• Organic waste

• Radioisotopes

• Plant nutrients

Which of the following is NOT a source of water pollution?

• Agricultural runoff

• Natural springs

• Industrial waste

• Domestic effluents

What is the main consequence of oil spills in marine environments?

• Formation of a thick layer blocking light

• Improved marine biodiversity

• Increased oxygen levels

• Rapid decomposition of oil

How do thermal plants contribute to water pollution?

• By reducing water temperature

• By releasing cold water

• By causing deoxygenation

• By increasing oxygen levels

What is a common effect of agricultural runoff on water bodies?

• Improved water clarity

• Decreased nutrient levels

• Eutrophication

• Increased biodiversity

Which of the following activities is NOT mentioned as a source of water pollution?

• Construction work

• Space exploration

• Stock breeding

• Mining activities