In which of the following reactions can the oxidation number of the nitrogen be said to have increased?
-
2NO(g) + O2(g) โ 2NO2(g)
- 2NO(g) + Cl2(g) โ 2NOCl(l)
- FeSO4(aq) + NO(g) โ Fe(NO)SO4(s)
- NO(g) + Br2(l) โ 2NOBr(l)
The correct answer is: A
Explanation
In option A, the oxidation number of Nitrogen increased from +2 to +4.
In Option B, the oxidation number of Nitrogen decreased from +2 to +1 (Bearing in mind that the O.N of chlorine in hypochlorate - OCl is +1)
In Option C, the oxidation number of Nitrogen decreased from +2 to +1
In Option D, the oxidation number of Nitrogen decreased from +2 to +1 (Bearing in mind that the O.N of bromine in hypobromate - OBr is +1)
Therefore, the answer is option A