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