According to Centrol Pollution Control Board (CPCB) particulate size 2.5 micrometers or less in diameter are responsible for causing various breathing and respiratory problems. They can also cause irritation, inflammations, damage to the lungs and premature deaths. It cannot directly enter circulatory system but indirectly through respiratory system.

Correct Option: C

According to Centrol Pollution Control Board (CPCB) particulate size 2.5 micrometers or less in diameter are responsible for causing various breathing and respiratory problems. They can also cause irritation, inflammations, damage to the lungs and premature deaths. It cannot directly enter circulatory system but indirectly through respiratory system.

In India, the Air (Prevention and control of pollution) Act came into force in 1981 but was amended in 1987 to include noise as an air pollutant.

Correct Option: A

In India, the Air (Prevention and control of pollution) Act came into force in 1981 but was amended in 1987 to include noise as an air pollutant.

The ozone (O₂) found in upper part of the atmosphere, i.e., Stratosphere, is Good ozone, since, it acts as a shield for absorbing UV-radiations from sun.

Correct Option: C

The ozone (O₂) found in upper part of the atmosphere, i.e., Stratosphere, is Good ozone, since, it acts as a shield for absorbing UV-radiations from sun.

Scrubbers are air pollution control devices that use liquid to remove particulate matter or gases from an industrial exhaust or flue gas stream. This atomized liquid (typically water) entrains particles and pollutant gases in order to effectively wash them out of the gas flow. It removes or scrubs SO₂ emissions from the exhaust of coal-fired power plants.

Correct Option: A

Scrubbers are air pollution control devices that use liquid to remove particulate matter or gases from an industrial exhaust or flue gas stream. This atomized liquid (typically water) entrains particles and pollutant gases in order to effectively wash them out of the gas flow. It removes or scrubs SO₂ emissions from the exhaust of coal-fired power plants.

Lichens are very good pollution indicators, they do not grow in pollutted areas. They are sensitive to sulphur dioxide pollution.

Correct Option: D

Lichens are very good pollution indicators, they do not grow in pollutted areas. They are sensitive to sulphur dioxide pollution.