Which of the following pollutants is not emitted during volcanic eruptions ?
SO2
H2S
Hydrocarbons
CO
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
Pollutants released from iron and steel industry are
CO2, NO2, H2S
CO, CO2, SO2
CO2, SO2, NO2
CO2, NO, SO2
Ultraviolet radiation is absorbed by
exosphere
ionosphere
mesosphere
stratosphere
Ozone depletion in the stratosphere is mainly caused by
NO2
NO
Chlorofluorocarbons
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 .
Ozone hole is maximum over
India
Pakistan
Australia
Antarctica
Ozone in stratosphere is depleted by
C6F6
C6H6Cl6
CF2Cl2
C7F16
Aerosols present in air are
negatively charged
positively charged
neutral
combination of all of the above
Formula of tear gas is
COCl2
N2O
C10H5ClN2
none of these
