1.What percentage of land area should remain covered by forest to maintain Ecological balance?
A. 10%.
B. 5%.
C. 33%.
D. None of these.
Answer: Option C
2.Full form of CTBT is;
A. Comprehensive Test Ban Treaty.
B. Comprehensive Test Bank Trust.
C. Comprehensive Trust Ban Treaty.
D. Comprehensive Test Ban Trusty.
Answer: Option A
3.Full form of BOD is;
A. Bactorial Oxygen Demand.
B. Biological Oxygen Demand.
C. Biological Oxide Demand.
D. None of the above
Answer: Option B
4.In Atmosphere nitrogen consists of;
A. 25%.
B. 12%.
C. 92%.
D. 78%.
Answer: Option D
5.Full form of COD is;
A. Chemical Oxide Demand.
B. Chemical Oxygen Demand.
C. Chemical Ozone Demand.
D. None of these.
Answer: Option B
6.The disease "Itai Itai" is caused by;
A. Manganize.
B. Carbon.
C. Cadmium.
D. None of these.
Answer: Option C
7.Human being can hear range of sound frequency between;
A. 20-20,000 Hertz.
B. 10-1,000 Hertz.
C. 1-100 Hertz.
D. None of these.
Answer: Option A
8.Environmental Protection Act enacted on;
A. 1980.
B. 1978.
C. 1986.
D. 1991.
Answer: Option C
9.First International Conference on environment held on;
A. March,1968.
B. March,1970.
C. June,1970.
D. June,1972.
Answer: Option D
10.With respect to environment science, full form of SPM is;
A. Suspended Partial Matter.
B. Suspended Particulate Matter.
C. Suspended Pollutant Matter.
D. None of these.
Answer: Option B
11.In an ecosystem, bacteria are the
A. Producers.
B. Primary consumers.
C. Secondary consumers.
D. Decomposers.
Answer: Option D
12.Deforestation generally decreases;
A. Rainfall.
B. Global warming.
C. Soil erosion.
D. Drought.
Answer: Option A
13.Which one of the following are non-renewable resources?
A. Animals.
B. Forests.
C. Fossil fuels.
D. All of these.
Answer: Option C
14.Biosphere reserve project was initiated in India during;
A. 1986
B. 1984
C. 1989
D. 1985
Answer: Option A
15.Sound becomes hazardous noise pollution at decibels-
A. Above 50.
B. Above 80.
C. Above 100.
D. Above 130.
Answer: Option B
16.Phytoplanktons are the members of;
A. Grassland ecosystem.
B. Desert ecosystem.
C. Forest ecosystem.
D. Aquatic ecosystem.
Answer: Option D
17.Syringes are examples of
A. Industrial wastes.
B. Biomedical wastes.
C. Domestic wastes.
D. Radioactive wastes.
Answer: Option B
18.Silviculture is the management of-
A. Rivers.
B. Lakes.
C. Hills.
D. Forests.
Answer: Option D
19.Minamata diseasse are first detected in;
A. Mexico.
B. Japan.
C. USA.
D. India.
Answer: Option B
20.Taj Mahal is threatened due to;
A. Sulphur dioxide.
B. Carbon dioxide.
C. Carbon monoxide.
D. Water vapour
Answer: Option A
21.Rapid growth of population at present time is due to-
A. Lack of awareness among people to check birth rate.
B. Global terrorism.
C. Family planning.
D. Migration.
Answer: Option A
22.Which of the following have been able to check the rapid growth of population?
A. Underdeveloped countries.
B. Developed countries.
C. Developing countries..
D. None of these.
Answer: Option B
23.Which of the following is a radioactive element
A. Uranium.
B. Argon.
C. Chromium.
D. Cobalt.
Answer: Option A
24.Supersonic planes cause;
A. Noise pollution.
B. Air pollution.
C. Radioactive pollution.
D. Soil pollution.
Answer: Option A
25.World environment day is celebrated every year on-
A. Aug 12.
B. June 5.
C. September 8.
D. July 10.
Answer: Option B
27.Ozone layer exists in;
A. Troposphere.
B. Stratosphere.
C. Mesosphere.
D. Ionosphere.
Answer: Option B
28.Ozone layer is being depleted by;
A. Smog.
B. Sulphur dioxide.
C. Carbon monoxide.
D. Chloroflurocarbon.
Answer: Option D
29.Which of the following processes contributes maximum to the power generation in
India?
a) Hydel power
b) Thermal power
c) Nuclear power
d) Solar and wind power
Solution (b)
30.Bhopal gas tragedy has been one of the most deadliest industrial hazards in the
history of India. Which of the following gas was released causing the disaster?
a) Potassium cyanide
b) Potassium isocyanate
c) Methyl isocyanate
d) Phosgene
Solution (c)
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