Q1. Ozone layer in atmosphere—
Produces rain
Produces pollution
Provides safety from ultraviolet radiation
Produces oxygen
Q2. Ozone protects biosphere from—
Infra-red rays
Ultraviolet rays
X-rays
Gamma rays
Q3. Ozone layer absorbs—
Cosmic rays
Infrared rays
Ultraviolet rays
All radiations
Q4. Harmful ultraviolet radiation can cause—
Liver cancer
Brain cancer
Oral cancer
Dermal cancer
Q5. Ozone layer is above earth crust around—
50 km
300 km
2000 km
20 km
Q6. International Day for Preservation of Ozone Layer—
15 August
16 September
24 October
1 May
Q7. Montreal Protocol is related to protection of—
Greenhouse gases
Acid rain
Ozone layer
Endangered species
Q8. Thickness of stratospheric ozone layer is measured in—
Sieverts
Dobson units
Melson units
Beaufort scale
Q9. Pollutants causing maximum damage to ozone layer are—
Hydrocarbon
Carbon dioxide
Nitrous oxides
Chlorofluorocarbons
Q10. Gas responsible for erosion of ozone layer—
Carbon dioxide
Carbon monoxide
Nitrous oxide
Chlorofluorocarbons
Q11. Which is NOT true about CFC?
Used as refrigerant
Not responsible for greenhouse effect
Reduces ozone
Inactive in lower atmosphere
Q12. In stratosphere ozone level is naturally regulated by—
Nitrous oxide
Nitrogen dioxide
CFC
Water vapour
Q13. Which is NOT responsible for ozone depletion?
CFC-12
Methyl chloroform
HALON-1211
Nitrous oxide
Q14. Massive ozone hole over Antarctica was first discovered in—
1976
1985
1960
None
Q15. Formation of ozone hole is maximum over—
India
Africa
Antarctica
Europe
Q16. Team that first discovered ozone hole over Antarctica—
Russian Team
German Team
American Team
British Team
Q17. Ozone holes are more pronounced at—
Equator
Tropic of Cancer
Tropic of Capricorn
Poles
Q18. Ozone hole is caused by—
Acetylene
Ethylene
Chlorofluorocarbons
Methane
Q19. Ozone Halo over Tibetan Plateau discovered in 2005 by—
M Molina
Joseph Farman
GW Kent Moore
Marcus Rex
Q20. Major reason for ozone hole over Antarctica—
Tropospheric turbulence
Polar front + stratospheric clouds + CFC
Absence of polar front
Global warming only
Q21. Which greenhouse gas does NOT cause ozone pollution in troposphere?
Methane
Carbon monoxide
Nitrogen oxides
Water vapours
Q22. Control and phase-out of ozone depleting substances is associated with—
Bretton Woods Conference
Montreal Protocol
Kyoto Protocol
Nagoya Protocol
Q23. Which is NOT correctly matched?
Ozone – CFC
Acid rain – Nitric acid
Rocket fuel – Kerosene oil
Greenhouse Effect – Carbon dioxide
Q24. CFCs are used in—
Only I
Only IV
I, III and IV
I, II, III and IV
Q25. Ozone depleting substances are—
Only I
I and II
II and III
I, II and III