Major Types of Pollution

Q. Which type of pollution is mainly responsible for the depletion of the ozone layer?

1. Water pollution
2. Air pollution
3. Noise pollution
4. Light pollution

Q. The ____________ pollutants are volcanic eruptions, wind erosion, pollen disposal, evaporation of organic compounds, and radioactive elements.

1. man-made
2. synthetic
3. geographical
4. natural

Q. Ashok had a garden in his house and he took real good care of the plants in his garden. It so happened that he couldn't really look after his plants for a few days because of incessant rains in his place. When he finally went to check up on his plants, he noticed that instead of growing up, they had drooped and the leaves had turned pale green. He also observed that the lustrous white marble pillars of his house had lost its shine and turned yellowish. He collected the water sample when it rained again and found that blue litmus paper turned red upon exposing it to the collected water.
What could be the possible reasons for his observations?

1. Acid rains caused due to excessive burning of fossil fuels.
2. Due to water pollution- the polluted water turned acidic while evaporating and came down as acid rain.
3. Due to formation of acid when carbon dioxide reacted with nitrogen in the presence of water vapour and sunlight.
4. Due to formation of dilute sulphuric acid and nitric acid in the atmosphere.

Q. Green house effect is the cumulative result of the influences of certain gases. Identify the gas which is not involved in this influence?

1. Carbon dioxide
2. Chlorofluorocarbons
3. Methane
4. Nitrogen