Oxidation number of nitrogen in NO3-1 is:
Correct answer: D. +5
- A. +2
- B. +6
- C. +4
- D. +5
Explanation
In the nitrate ion, NO3-1, each oxygen atom has an oxidation number of -2. The total contribution from three oxygen atoms is -6. To achieve the overall charge of -1 for the ion, nitrogen must have an oxidation number of +5. This is because +5 combined with -6 results in the -1 charge of the ion.Options +2, +4, and +6 are incorrect as they do not satisfy the charge balance required for NO3-1, which must sum to -1.
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