1.

Oxidation state of oxygen is zero inA. COB. `O_3`C. `SO_2`D. `H_2O_2`

Answer» Correct Answer - B
Oxidation state of O in `O_3` =0 (zero)
O.S. of O in CO and `SO_2`=- 2
O.S. of O in `H_2O_2` = -1


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