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