Acid rain occurs due to the presence of :
1. in the atmosphere
2. in the atmosphere
3. in the atmosphere
4. in the atmosphere
An increase in concentration in the atmosphere will result in :
1. Adverse effects on natural vegetation.
2. Global warming.
3. Temperature decrease in a global atmosphere.
4. Genetic disorders in plants and animals.
The most harmful air pollutant produced by automobiles is-
1.
2. NO
3.
4. CO
The most hazardous metal pollutant of automobile exhaust is :
1. Hg
2. Cd
3. Pb
4. Cu
B.O.D is connected with-
1. Organic matter
2. Microbes
3. Both (1) and (2)
4. None of the above.
The major contributor to water pollution among the following is-
1. Sound
2.
3. Salts of arsenic
4. Sewage
The main factor of water pollution is:
1. Smoke
2. Industrial waste
3. Detergent
4. Ammonia
Ozone depletion occurs in :
1. Tropospheric pollution.
2. Stratospheric pollution.
3. Air pollution.
4. Photochemical smog.
Major component of acid rain is :
1.
2.
3. HCl
4.
... is not a greenhouse gas :-
1. Hydrogen
2. Carbon dioxide
3. Methane
4. Nitrous oxide or