JAMB - Chemistry (2001 - No. 28)

In which of the following reactions has the oxidation number of nitrogen increased?
2NO(g) + Br2(l) → 2NOBr(l)
2NO(g) + O2(g) → 2NO2(g)
FeSO4(aq) + NO(g) → Fe(NO)SO4(s)
2NO(g) + Cl2(g) → 2NOCl(l)

Explanation

In option B, the oxidation of Nitrogen increases from +2 to +4, when you calculate the oxidation number.

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