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Man And His Environment Set 4
Results
#1.
The concentration of CO2 in atmosphere is:
0.3%
0.3%
0.03%
0.03%
3.0%
3.0%
30.0%
30.0%
#2.
It is a poisonous gas and 1% of it in air can kill a person in 5 minutes:
N2
N2
CO2
CO2
CO
CO
NO2
NO2
#3.
CO is produced when fossil fuels are burnt in air in the presence of limited supply of:
H2
H2
CO2
CO2
N2
N2
O2
O2
#4.
Green house effect is the result of:
Air pollution
Air pollution
Forestation
Forestation
Ultra violet radiations
Ultra violet radiations
Water pollution
Water pollution
#5.
Acid rains in the result of:
Clear air
Clear air
Burning of fossil fuels
Burning of fossil fuels
Forestation
Forestation
None of these
None of these
Finish
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