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Question:
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Which of the following represents ozone gas molecule:
O3
CFCs have atmospheric lifetimes ranging from over ______ :
50 to 100 years
Which one of the following is largest ozone depletion substation that is emitted through activities of human:
Nitrous oxide
By _______, R-22 (HCFC) refrigerant will no longer be produced or imported.
2020
One chlorine or bromine radical liberated has the capability to act as catalyst and breakdown ____number of ozone molecules:
100,000
Production of Halons were phased out by ______ :
Jan 1, 1994
The ozone layer is mainly found at _____ above the surface of the earth
20 to 30 kms
The severe ozone depletion known as the “ozone hole” exist in which of the following continent:
Antarctica
Ozone in the Earth’s stratosphere is created by UV light striking ____ molecule
Oxygen
Which of the following atoms cause significant depletion of the ozone layer:
Both Chlorine and Bromine
Which of the following is more reactive in lower atmosphere (Troposphere):
HCFCs
Number of countries signed Montreal Protocol is _____ :
191
The Montreal Protocol treaty has been amended to ban CFC production after _____ in the developed countries:
1995
Which of the following compounds have less severe effect on ozone layer:
HFCs
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