Q.1 Heavy metal pollution of water is caused by :
Q.2 Supersonic Aircrafts discharge the following substance into the statosphere:
A.SO<sub>2</sub>
B.CO<sub>2</sub>
C.NO<sub>2</sub>
C.Aerosols
D.CFC
Answer:-C
A.Acid Plants
B.Paints
C.Wood Burning
D.Domestic Sewage
Answer :-B
A.SO<sub>2</sub>
B.CO<sub>2</sub>
C.NO<sub>2</sub>
D.CO
Answer :-C
Q.3 Atmosphere contains dust particles, salt grains, pollen grains, smoke, etc. which are collecctively known as :
A.Water vapour
B.OzoneC.Aerosols
D.CFC
Answer:-C
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