Global Warming and Change in Atmospheric Chemistry

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1. It decreases the temperature of the earth’s surface
2. It allows more ultraviolet solar radiation to reach the earth’s surface
3. It increases the concentration of carbon dioxide in the atmosphere
4. It leads to the creation of more ozone gas

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1. A two-atom isotope of oxygen (O2)
2. A three-atom isotope of oxygen (O3)
3. A gas that causes the temperature of the earth’s surface to rise
4. A gas that protects plants from solar radiation

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1. 10km to 50km up in the atmosphere
2. 12km to 35km in the stratosphere
3. 0km to 10km up in the atmosphere
4. 35km to 50km in the stratosphere

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1. Because there is a high density of gases in this part of the atmosphere
2. Because there are frequent collisions between molecules in this part of the atmosphere
3. Because most of the solar ultraviolet rays are absorbed in this part of the atmosphere
4. Because the ozone mixing ratio is maximum at this height

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1. Between the height of 30 to 60 km
2. Between the height of 20 to 25 km
3. Below the altitude of 35 km
4. Above the altitude of 80 km

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1. By the actions of solar radiation on ozone
2. By the photomechanical reaction triggered by sunlight
3. By the collision of three atoms of oxygen
4. By the transportation of ozone from tropical areas to polar areas

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1. By collision of ozone with monatomic oxygen (O)
2. By the actions of solar radiation on oxygen
3. By the transportation of ozone to lower heights in the atmosphere
4. By the collision of ozone with individual molecules of oxygen (O2)

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1. 3 to 4 mm out of 8m
2. 4 to 5 mm out of 10m
3. 5 to 6 mm out of 12m
4. 6 to 7 mm out of 14m

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1. 1965
2. 1967
3. 1985
4. 1987

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1. discharge and transport of nitrous oxides caused by nuclear tests
2. excessive use of CFCs by industries
3. volcanic eruptions
4. natural weather patterns

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1. The British Antarctic Survey Team led by Joseph Farman
2. The Montreal Protocol
3. The World Watch Institute
4. The NASA Ozone Trend Panel

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1. 1967
2. 1985
3. 1987
4. 1989

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1. The Kyoto Protocol
2. The Paris Agreement
3. The Montreal Protocol
4. The Rio Declaration

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1. The depletion of ozone was a seasonal phenomenon and was confined to the atmosphere over Antarctica alone.
2. The depletion of ozone was a global affair.
3. Ozone depletion was caused by natural weather patterns.
4. Ozone depletion was not a significant environmental issue.

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1. Ozone depletion, greenhouse effects, soil erosion, deforestation, and population growth.
2. Nuclear testing, air pollution, water contamination, soil erosion, and climate change.
3. Overfishing, plastic pollution, deforestation, water scarcity, and soil degradation.
4. Air pollution, water contamination, deforestation, desertification, and natural disasters.

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1. Geological processes
2. Photochemical processes
3. Physical processes
4. Chemical processes

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1. Winter months
2. Summer months
3. Spring months
4. Autumn months

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1. Due to high concentration of nitrogen oxides in those regions
2. Due to photochemical processes occurring in those regions
3. Due to transport of ozone by atmospheric circulation towards the polar areas
4. Due to high concentration of halons in those regions

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1. Nitrogen oxides
2. Carbon dioxide
3. Halogenated gases like chlorofluorocarbons and halons
4. Methane

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1. Toxic and flammable at ground level
2. Inert gases
3. Potent destroyers of the ozone layer in the stratosphere
4. Harmless gases that contribute to the greenhouse effect

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