The lowest layer of earth's atmosphere is
troposphere
mesosphere
stratosphere
ionosphere
Global warming may result in
flood
cyclone
decrease in forest productivity
all of the above
BHC and DDT act as
carcinogens
allergens
asthematic agents
all of these
Lead in water can cause
arthritis
hair falling
kidney damage
All of these
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 capacity of blood.
Which of the following statement is wrong?
Polar stratospheric clouds (PSCs) are clouds formed over Antarctica.
Acid 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.
Pollutants released from iron and steel industry are
CO2, NO2, H2S
CO, CO2, SO2
CO2, SO2, NO2
CO2, NO, SO2
Aerosols present in air are
negatively charged
positively charged
neutral
combination of all of the above
Ozone depletion in the stratosphere is mainly caused by
SO2
NO2
NO
Chlorofluorocarbons
Ozone in stratosphere is depleted by
C6F6
C6H6Cl6
CF2Cl2
C7F16
