In which of the following processes does an element undergo a comproportionation reaction? — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Comproportionation is the reverse of disproportionation. Two species containing the same element in different oxidation states react to form a product with an intermediate state. In $NH_4NO_2$, nitrogen is -3 in $NH_4^+$ and +3 in $NO_2^-$. Both converge to 0 in $N_2$.