Biology Multiple Choice Questions and Answers for Different Competitive Exams

Biology Practice Test on Environmental Issues- Pollution and Green house effect

Population explosion, technological advancements and socio economic activities, such as urbanization, intensive agriculture and massive industrialization  are the major contributing factors of environmental pollution.
lost my house
Greenhouse effect and ozone depletion are the two major environmental issues. The increased amounts of green house gases in the atmosphere are affecting the global climate. The climate change will increase threats to human health. Global warming will lead to changes in weather patterns and ocean currents.

Biology Practice Test on Environmental issues : Pollution  and Green house effect

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1. Ozone in stratosphere extends
10-20 km
20-25 km
25-35 km
35-45 km
2. According to Kyoto Protocol the major nations abide to reduce concentration of green house gases by
3. Which of the following group of gases cause photochemical smog?
O3, PAN, and CO
O2, PAN, and NO2
O3, PAN, and NO2
HC, PAN, and NO
4. Bio indicators are used for
Oxygen Demand
Air Pollution
Mineral present
All of these
5. Gaseous pollutant can be controlled by
Electrostatic precipitators
6. It is estimated that out of the total global warming the relative contribution of CO2, CH4, CFCs and N2O are found respectively
60%, 20%, 14% and 6%
6%, 20%, 14% and 60%
14%, 20%, 6% and 6%
20%, 20%, 14% and 6%
7. Which of the following is not an air pollutant?
Pollen from plants
Sulphur dioxide
8. Which of the following is not a renewable exhaustible natural resource?
Wild life
9. Which one of the following is a most efficient device to eliminate particulate matters from industrial emissions?
Cyclonic separators
Electrostatic precipitator
Trajectory separators
10. Which of the following is true? 
i. Benzene hexachloride a non biodegradable pollutant
ii. Carbon dioxide is a primary air pollutant
iii. Sulphur dioxide causes brown air effect during traffic congestion in cities
iv. anthropogenic air pollutants are natural in origin
i and ii only
ii and iii only
i and iv only
iii and i only
Score =
Correct answers:



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