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 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.
Ultraviolet radiation is absorbed by
exosphere
ionosphere
mesosphere
stratosphere
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
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
Which of the following pollutants is not emitted during volcanic eruptions ?
SO2
H2S
Hydrocarbons
CO
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
Ozone hole is maximum over
India
Pakistan
Australia
Antarctica
Ozone in stratosphere is depleted by
C6F6
C6H6Cl6
CF2Cl2
C7F16
