Question

Which of the following cannot be the oxidation number of O? a) -1 b) +2 c) -2 d) +1

Answer 1

Answer:

the ans is -2 because it has 2 atoms in last shell

Answer 2

Answer:

-2

Explanation:

Oxygen has an oxidation number of −2 in most compounds. The major exception is in peroxides (compounds containing O X 2 X 2 − \ce{O2^2-} OX2X2−), where oxygen has an oxidation number of −1 . Examples of common peroxides include H X 2 O X 2 \ce{H2O2} HX2OX2 and N a X 2 O X 2 \ce{Na2O2} NaX2OX2.