Oxidation number of elements in atoms and ions Quiz

The oxidation number of Cr in Cr₂O₇^2-

+6

-3

-6

+3

+12

The oxidation number of ‘O’ in OF₂ is

+1

+2

-1

-2

Determine the oxidation number of ‘Cl’ in ClO₄^–

+5

-5

-3

-7

+7

-1

Determine the oxidation number of Nitrogen ‘N’
in the compound HNO₃

+1

+3

-3

-5

+5

Determine the oxidation number of ‘N’ in NH₄⁺

+4

-3

+3

+1

What is the oxidation number of ‘O’ in H₂O₂

+2

+1

-1

-2