MCQOPTIONS
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| 1. |
Which one of the following gas is the major constituent for the depletion of ozone layer? |
| A. | PbO |
| B. | CO |
| C. | CFC |
| D. | \[N{{O}_{2}}\] |
| E. | Non of these |
| Answer» D. \[N{{O}_{2}}\] | |