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________________?

Related Mcqs:

1. 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

2. 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)

3. TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes_________________?

   A. Skin disorder
   B. Bronchitis
   C. Bone disease
   D. Cancer

4. Exposure to small amount of ______________ results in high blood pressure & heart disease in human beings?

   A. Hydrogen sulphide
   B. Mercury
   C. Cadmium
   D. Asbestos

5. Fluorosis is caused due to the presence of excessive amount of ______________ in drinking water?

   A. Mercury
   B. Lead
   C. Fluoride
   D. Arsenic

6. Workers working in _______________ industry are most prone to white lung cancer?

   A. Coal mining
   B. Limestone mining
   C. Textile
   D. Asbestos

7. 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

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

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

9. Which of the following is not a source of ozone emission in the atmosphere?

   A. Refrigerators
   B. Xerox machines
   C. Dermatological photo-therapy equipments
   D. High voltage electrical equipments

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