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 ?

Related Mcqs:

1. There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth’s surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about _____________ °C/km?

   A. 0.05
   B. 1
   C. 6.5
   D. 15

2. 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?

   A. 102
   B. 105
   C. 109
   D. 1015

3. Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of________________?

   A. CO2
   B. SO2
   C. Hydrocarbons
   D. CFC (chloro fluoro carbon)

4. The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the_________________?

   A. Ionosphere
   B. Troposphere
   C. Stratosphere
   D. None of these

5. The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?

   A. 20
   B. 230
   C. 750
   D. 1500

6. Most of the atmospheric air pollutants are present in large quantity in__________________?

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

7. High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes____________________?

   A. Cancer
   B. Silicosis
   C. Respiratory disease (e.g., asthma)
   D. Reduced crop yield

8. Which of the following pollutants, if present in atmosphere is detectable by its odour ?

   A. CO
   B. SO2
   C. NO2
   D. CO2

9. Which of the following air pollutants is not toxic to vegetation i.e., doesn’t cause vegetation damage ?

   A. Smog & ozone
   B. Hydrogen fluoride & nitrogen oxides
   C. Sulphur dioxide & spray of weed killers
   D. Carbon monoxide

10. Presence of high concentration of ozone and smog in atmospheric air causes the __________________?

    A. Embrittlement & decrease of folding resistance of paper
    B. Cracking of rubber products
    C. Fading of dye on textiles
    D. Damage of electrical insulator on high tension power line