A. A primary pollutant
B. A secondary pollutant
C. Impervious to ultra-violet rays
D. Both B. and C.
Related Mcqs:
- 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 - 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) - 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 - 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 - The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?
A. 20
B. 230
C. 750
D. 1500 - 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) - TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?
A. 0.1
B. 25
C. 100
D. 1000 - Main pollutants released from petroleum refineries is__________________?
A. CO, SO2 & H2S
B. CO2, NO & SO3
C. CO2, H2S & NO2
D. SO3, NO2 & CO2 - Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is__________________?
A. Inversely proportional to viscosity of gas
B. Proportional to the viscosity & density of the gas
C. Proportional to the pressure of the gas
D. Both B. and C. - A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction of oxygen is__________________?
A. 0.16
B. 0.33
C. 0.66
D. 0.47
