A. The smoke, gases and fumes coming out of the factory chimneys
B. The transport vehicles badly pollute the air
C. Both (a) & (b)
D. None of these
The correct answer to the question: "Air pollution is caused by:" is "Both (a) & (b) ".
A. The smoke, gases and fumes coming out of the factory chimneys
B. The transport vehicles badly pollute the air
C. Both (a) & (b)
D. None of these
A. Phosphene
B. SiF4
C. Dust
D. Halogens
A. 10-15%
B. 15-20%
C. 20-25%
D. 2-5%
A. Automobile exhausts
B. Radioactive substances
C. Smoke
D. All of the above
A. Sewage and industrial effluents
B. Household detergents and pesticides
C. Automobile exhausts and chemicals from industry
D. Sewage and pesticides
A. Thermal power plant
B. Diesel engine
C. Hydroelectric power station
D. Pollen grain
A. Phosphate rock only
B. Agricultural fertilizers only
C. Sewage and phosphate rock
D. Sewage and agricultural fertilizers
A. Thermal power plant
B. Automobile
C. Radioactive power plant
D. Hydroelectric power plant
A. CFC, CH4 and SO2
B. Sulphates of Na, Ca and Fe
C. Fly ash
D. All of these
A. Hot water from power plants
B. Hot chemicals from industries
C. Waste from mines
D. Waste from agricultural fields
A. O3
B. CO
C. CO2
D. N2
The correct answer to the question: "Air pollution is caused by:" is "Both (a) & (b) ".
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