Aerosols present in air are
negatively charged
positively charged
neutral
combination of all of the above
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
Pollutants released from iron and steel industry are
CO2, NO2, H2S
CO, CO2, SO2
CO2, SO2, NO2
CO2, NO, SO2
A person dies in atmospheric of CO because it
combines with oxygen present in the body
destroys W.B.C
reduces water in the tissues.
combines with haemoglobin of blood and form stable compound carboxyhaemoglobin and reduces the oxygen carrier capecity of blood .
Main pollutant from automobile exhaust is
CO
CO2
NO
Hydrocarbons
Which of the following statement is wrong ?
Polar stratospheric clouds (PSCs) are clods formed over Antarctica.
Acis rain dissolves heavy metals such as cu ,Pb,Hg and Al from soil,rocks and sediments.
H2SO4 is major contributor to acid rain .HNO3 ranks second and HCl third in this respect
Fishes grow as well in warm as in cold water .
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
Persons working in cement plants and lime stone quarries are more prone to disease like
asthama
cancer
silicosis
pneumoconiosis
Ozone hole is maximum over
India
Pakistan
Australia
Antarctica
Lead population is mainly caused by
sewage
insecticide
leaded gasoline
None of these
