ENVIRONMENTAL ISSUES
2016 MARCH
1.
Increase
in the concentration of toxicants at successive trophic level is called
a)
BOD b) Biomagnification
b)
Eutrophication d) Algal Bloom (Score:
1)
2.
The major
pollution in the environment is caused by automobiles. Expand the term CNG.
Mention any 2 of its merits. (Scores: 2)
3.
Temperature
is generally increasing making the earth a hot plate. Mention any two measures
to control global warming.
2016 SAY
1.
Quantity of pollutants increase in successive
trophic levels. Observe the flowchart regarding biomagnifications of DDT in an
aquatic food chain and answer the following:
a.
What is biomagnification?
b.
What are the consequences of biomagnification? (Scores: 2)
2. Adequate waste
management is an environmental issue to be considered. Discuss the advantages
of Eco-san toilet. (Scores: 2)
MARCH 2017
1.
A common
cause of deforestation is slash and burn agriculture.
(a) What is the common name attributed to
such type of cultivation? (Score:
l)
(b) Explain how this type of cultivation
is practiced? (Score: 1)
2.
Particulate
matter in polluted air is removed by the application of electrostatic
precipitator. Explain the working principle of electrostatic precipitator.
(Scores: 2)
MARCH 2018
1.
Ozone
acts as a shield for absorbing ultraviolet radiations from the Sun.
a.
Name the
region of atmosphere where Ozone is seen.
b.
Write the
unit used to measure ozone layer.
2.
In 1990s,
Delhi ranked 4th among the most polluted cities of the world. What
are the parallel steps taken to reduce vehicular pollution?
3.
Increase in
the level of greenhouse gases leads to global warming. How can it be controlled?