A. Ethylene
B. 3.4 Benzpyrene
C. N2O
D. PAN
Pollution
Pollution
A. Reverse osmosis
B. Electrodialysis
C. Both (a) & (b)
D. None of these
A. Jet air crafts only
B. Fire extinguishers and jet air crafts
C. Refrigerators and jet air crafts
D. All of these
A. Mesopause
B. Tropopause
C. Stratopause
D. All of these
A. Phosphene
B. Nitrogen
C. Hydrogen
D. Nerve gas VX
A. Los Angeles type smog
B. New York type smog
C. Tokyo type smog
D. California type smog
A. Melting of polar ice
B. Destruction of phytoplanktons
C. Inundation of coastal towns
D. Increase in productivity
A. Hydrocarbons only
B. Hydrocarbons and SO2
C. Hydrocarbons and N2O
D. Particulate matter and SO2
A. Calcium salts
B. Cobalt salts
C. Silicon oil
D. Barium salts
A. In the mid day
B. At night
C. In early morning
D. At evening