Pollutants released from iron and steel industry are
CO2, NO2, H2S
CO, CO2, SO2
CO2, SO2, NO2
CO2, NO, SO2
The lowest layer of earth's atmosphere is
troposphere
mesosphere
stratosphere
ionosphere
Persons working in cement plants and lime stone quarries are more prone to disease like
asthma
cancer
silicosis
pneumoconiosis
Aerobic oxidation is caused by
aerobic bacteria in presence of excess of oxygen
aerobic bacteria in absence of oxygen
anaerobic bacteria in presence of oxygen
anaerobic bacteria in absence of oxygen
Ultraviolet radiation is absorbed by
exosphere
BHC and DDT act are
carcinogens
allergens
asthematic agents
all of these
Planting more and more trees helps to
reduce CO2 in the air
increase CO2 in the air
reduce O2 in the air
reduce CO2 and increase O2 in the air
Main pollutant from automobile exhaust is
CO
CO2
NO
hydrocarbons
Which of the following statement is false?
London smog is oxidizing in nature
London smog causes bronchitis
London smog is formed in winter
London smog contains H2SO4 droplets
Aerosols present in air are
negatively charged
positively charged
neutral
combination of all of the above
