Lead population is mainly caused by
sewage
insecticide
leaded gasoline
None of these
Main pollutant from automobile exhaust is
CO
CO2
NO
Hydrocarbons
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
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
Persons working in cement plants and lime stone quarries are more prone to disease like
asthama
cancer
silicosis
pneumoconiosis
Which of the following statement is false?
London smog is oxidising in nature
London smog causes bronchitis
London smog is formed in winter
London smog contains H2SO4 droplets
Which of the following pollutants is not emitted during volcanic eruptions ?
SO2
H2S
Formula of tear gas is
COCl2
N2O
C10H5ClN2
none of these
Global warming may result in
flood
cyclone
decrease in forest productivity
all of the above
Lead in water can cause
arthritis
hair falling
kidney damage
All of these
