Oxidation number of elements in atoms and ions Quiz Determine the oxidation number of ‘N’ in NH4+ +3 -3 +4 +1 Determine the oxidation number of Nitrogen ‘N’ in the compound HNO3 +1 -5 +3 +5 -3 What is the oxidation number of ‘O’ in H2O2 -1 -2 +2 +1 Determine the oxidation number of ‘Cl’ in ClO4– -3 -7 -1 -5 +5 +7 The oxidation number of Cr in Cr2O72- +3 -3 +12 +6 -6 The oxidation number of ‘O’ in OF2 is +1 +2 -2 -1 Loading … Question 1 of 6 Share this:TweetWhatsAppLike this:Like Loading...