Answer:
Option D. 4
Explanation:
The oxidation number of nitrogen (N) in NO₂ can be obtained as follow:
Oxidation number of O = –2
Oxidation number of N =?
N + 2O = 0
N + 2(–2) = 0
N – 4 = 0
Collect like terms
N = 0 + 4
N = +4
Thus, the oxidation number of nitrogen (N) in NO₂ is +4
