What are the chief pollutants of the atmosphere which are most likely to deplete the ozone layer?

Related Mcqs:

1. Ozone layer of upper atmosphere is being destroyed by:

   A. Sulphur di-oxide
   B. Carbon di-oxide
   C. Chloro-fluoro-carbon
   D. Smog

2. Ozone layer in stratosphere is effected by:

   A. Excess CO2
   B. Excess CO
   C. Chloro-fluoro-carbon
   D. Low rainfall

3. Ozone layer having:

   A. The protective layer of ozone in the upper stratosphere, found at a level between 15 and 150 km above
   B. The Earth which prevents harmful ultraviolet B radiation which causes skin cancer and threatens plant life from reaching the ground
   C. Both (a) & (b)
   D. None of these

4. The lower most layer of atmosphere in which man and other living organisms exist is called:

   A. Thermosphere
   B. Mesosphere
   C. Stratospheres
   D. Troposphere

5. The pollutants like phenol, Na and Hg can be removed from water by technique/s such as:

   A. Reverse osmosis
   B. Electrodialysis
   C. Both (a) & (b)
   D. None of these

6. Some reliable indicators of air pollutants (SO2 and noxious gases) are:

   A. Ferns and Cycas
   B. Green algae and aquatic liverworts
   C. Lichens and mosses
   D. Neem’ tree and Eichhornia

7. What is Pollutants:

   A. Agents that pollute; these may be gaseous (vapours) or particulate (solid and liquid particles)
   B. On the basis of the amount and their relative harmfulness or toxicity
   C. Both (a) & (b)
   D. None of these

8. The result of ozone hole is:

   A. Global warming
   B. Acid rain
   C. Greenhouse effect
   D. The UV radiations reach the earth

9. Ozone hole is refers to as:

   A. Hole in ozone layer
   B. Decrease in the ozone layer in troposphere
   C. Decrease in thickness of ozone layer in stratosphere
   D. Increase in the thickness of ozone layer in troposphere

10. Checking of re-radiating heat by atmospheric dust water vapour, ozone, CO2 is known as:

    A. Green house effect
    B. Radioactive effect
    C. Ozone layer effect
    D. Solar effect