Persons working in cement plants and lime stone quarries are more prone to disease like
asthama
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
BHC and DDT act as
carcinogens
allergens
asthematic agents
all of these
Ozone hole is maximum over
India
Pakistan
Australia
Antarctica
Ultraviolet radiation is absorbed by
exosphere
ionosphere
mesosphere
stratosphere
Aerosols present in air are
negatively charged
positively charged
neutral
combination of all of the above
Pollutants released from iron and steel industry are
CO2, NO2, H2S
CO, CO2, SO2
CO2, SO2, NO2
CO2, NO, SO2
Which of the following pollutants is not emitted during volcanic eruptions ?
SO2
H2S
Hydrocarbons
CO
Ozone in stratosphere is depleted by
C6F6
C6H6Cl6
CF2Cl2
C7F16
Lead in water can cause
arthritis
hair falling
kidney damage
All of these