| I. These chemicals are inert, non flammable, nontoxic, and lighter than air and can remain intact for years |
| II. CFCs are commonly used in Air conditioners and the Refrigeration industry (Freon gas), aerosol propellants (in perfumes and deodorants), in the foam packaging industry (Styropor, Thermocol) and as solvents for greases and glues. |
| III. They contain Chlorine and Fluorine, common being CFC 11, CFC 12, CFC 22 and CFC 13. |
A) I & II
B) II & III
C) Only III
D) All the above
Correct Answer: D
Solution :
CFCs and HCFCs destroy ozone in the stratosphere. These chemicals are inert, non-flammable, of toxic, and lighter than air and can remain intact for years. They contain Chlorine and Fluorine, common being CFC-11, CFC-12, CFC-22 and CFC- 13.
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