Answers

2016-01-24T16:16:58+05:30
1- oxygen gas(O2) thatt we breathe....& 2- ozone(O3) which protects us frm UV rays...of sun
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2016-01-24T16:18:05+05:30
The two forms of oxygen found in air are:
O2 and O3
O2 = oxygen
O3 = ozone

Hope it helps :)
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