Question

In which of the following, oxygen has +2 oxidation number ?

• A. $F_2O$
• B. $Cl_2O$
• C. $Na_2O_2$
• D. $Na_2O$

Answer 1

Answer: (A)

$F_2O$

Answer 2

Oxygen shows +ve oxidation states only in compounds with fluorine, because fluorine is the only element more electronegative than oxygen. Therefore, in $F_2O$ oxidation state of O is + 2.