Related Questions

which one among the following is responsible for formation of 'Ozone Holes' in the stratosphere?
A Chloro Fluoro Carbons
B Benzopyrene
C Hydrocarbons
D UV radiation
The presence of ozone in the stratosphere is responsible for
A Increasing the average global temperature in recent years
B Higher rate of photosynthesis
C Checking the penetration of ultraviolet rays to the earth
D Supplying oxygen for people travelling in jets
Which one among the following is responsible for formation of "OzoneHoles'in the stratosphere?
A Chloro Fluoro Carbons
B Benzopyrene
C Hydrocarbons
D UV radiation
Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?
A Ammonia
B Carbon dioxide
C Sulphur dioxide
D Fluorine
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?
A CO
B SO2
C NOx
D CFC (chloro fluoro carbons)
The pollutant responsible for ozone holes is ________
A CO2
B SO2
C CO
D CFC
Ozone depletion in the stratosphere is mainly caused by
A SO2
B NO2
C NO
D Chlorofluorocarbons
The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU).
A 20
B 230
C 750
D 1500
What does the underlined word mean in the following sentence?The old man's house, badly in need of paint, was leaning to one side and had holes in the roof, but one side and had holes in the roof, but
A poorly built
B old-fashioned
C run down
D dirty
An intrinsic semiconductor has some holes in it at room temperature. What causes these holes?
A Doping
B Valence electrons
C Free electrons
D Thermal energy
E None of the above

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