A. 1000 to 2000
B. 3000 to 6000
C. 6000 to 9000
D. 10000 to 100000
A. 75
B. 95
C. 120
D. 140
A. Coal
B. Silica
C. Iron
D. None of these
A. Sludge disposal
B. Reduction of excessive flow in sewers
C. Biological treatment of wastes
D. None of these
A. Automobile exhaust
B. Flue gas of coal based power plant
C. Exhaust of nitric acid plant
D. Exhaust of sulphuric acid plant
A. Diffusion of
B. Centrifugal force on
C. Gravitational force on
D. Electrostatic force on
A. Deforestation
B. Rapid industrialisation
C. Increased transportation activity
D. All A., B. and C.
A. Explosion
B. Non biodegradable foam
C. Undesirable plant growth
D. Corrosion
A. Acetylene
B. Petrol vapor
C. Hydrogen
D. Carbon monoxide
A. Conversion of CO into CO2 in the second compartment
B. Conversion of NOx into N2 and NH3 in the first compartment
C. Oxidation of unburnt hydrocarbon fuel in the second compartment
D. All A., B. and C.