A. Catalytic conversion
B. Green house effect
C. Global warming
D. Both B. and C.
Correct Answer: D. Both B. and C. ✔
Last Updated: March 11, 2019
Related MCQs
- Which of the following is an adsorbent for removal of nitrogen oxides from gas/air ?
- Green house gases blanket/block the infrared radiation from earth’s surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ?
- High noise levels produced during operation of fans and compressors can be reduced by using__________?
- Salt content in sea water is about __________ percent?
- __________ is the process of killing organism in water ?
- Fresh sewage is __________ in nature?
- From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm?
- Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre?
- Which of the following fine dust removal equipments is the most efficient ?
- Noise level in a quiet private business office is about __________ decibels?
- Which of the following is not a weightless pollutant ?
- Noise pollution level in a chemical plant is expressed in __________?
- Smog is __________?
- Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in ‘gas chamber’ is about __________ ppm?
- For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm?
- Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?
- The term Biological Oxygen Demand (BOD) is used in relation to __________?
- The upper layer of atmosphere is called the __________?
- CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozone?
- The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU)?
- Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels?
- Disinfection of water is done to remove __________?
- In water treatment plant, zeolite process is used to remove the __________ of water?
- On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because __________?
- There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant ?