A. Stratosphere
B. Troposphere
C. Ionosphere
D. None of these
A. Quenching of hot coke
B. Discharging in the river stream
C. Filtration and recycling for cooling coke oven gas
D. None of these
A. Lagooning
B. Activated carbon adsorption
C. Biological oxidation pond
D. Chemical coagulation
A. Automobile exhaust
B. Flue gas of coal based power plant
C. Exhaust of nitric acid plant
D. Exhaust of sulphuric acid plant
A. By reaction of hydrocarbon & nitric oxide in presence of sunlight
B. Appears only on sunny days
C. Is harmful for crops and trees also besides causing eye irritation & asthma
D. All A., B. & C.
A. 0.05
B. 1
C. 6.5
D. 15
A. Hearing loss
B. Rupture of ear drum
C. Nervousness & fatigue
D. All A., B. & C.