1.
In India the temperate evergreen type of vegetation is found mostly in
A.
Western Himalayas above 3,500 Meter
B.
Eastern and western Himalayas less than 3,500
C.
Rajasthan and South Punjab
D.
Western ghats and Assam
Answer :
Eastern and western Himalayas less than 3,500
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2.
A food chain stars with
A.
Nitrogen fixation organisms
B.
Photosynthesising organisms
C.
Respiration
D.
Decomposers
Answer :
Photosynthesising organisms
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3.
Which of the following is mainly produced by the activity of anaerobic bacteria on sewage?
A.
Laughing gas
B.
Propane
C.
Mustard gas
D.
Marsh gas
Answer :
Marsh gas
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4.
Which will not cause any atmospheric pollution
A.
Hydrogen
B.
Sulphur dioxide
C.
Carbon dioxide
D.
Carbon monoxide
Answer :
Hydrogen
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5.
Which one is not a pollutant normally?
A.
Hydrocarbons
B.
Carbon dioxide
C.
Carbon monoxide
D.
Sulphur dioxide
Answer :
Carbon dioxide
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6.
The least porous soil among the following
A.
Loamy soil
B.
Clay soil
C.
Sandy soil
D.
Peaty soil
Answer :
Clay soil
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7.
A location with luxuriant growth of lichens on the trees indicates that the:
A.
Trees are very healthy
B.
Trees are heavily infested
C.
Location is highly polluted
D.
Location is not polluted
Answer :
Location is not polluted
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8.
Pyramid of number is inverted in case of
A.
Pond ecosystem
B.
Desert ecosystem
C.
Grass land ecosystem
D.
Forest ecosystem
Answer :
Desert ecosystem
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9.
Which pollutant exhibits biomagnification in food chain
A.
DDT
B.
SO2
C.
CO
D.
PAN
Answer :
DDT
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10.
B.O.D. is connected with
A.
Organic matter
B.
Microbes
C.
A and B both
D.
None of the above
Answer :
A and B both
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