Chemistry · Oct / Nov 2021 · Paper 11 · Question 20

Aqueous ammonium nitrite, NH4NO2, decomposes when heated. NH4NO2(aq) → N2(g) + 2H2O(l) In this salt, the anion is ......1...... . The nitrogen atoms in the ......2...... ion are oxidised during the reaction. Which formulae correctly complete gaps 1 and 2?

1. A1: NH4+ 2: NH4+
2. B1: NH4+ 2: NO2–
3. C1: NO2– 2: NH4+
4. D1: NO2– 2: NO2–

As printed in the paper