O-LevelChemistryAcids, Bases & Salts5070/11 · Oct/Nov 2021 · Q201 Mark

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?

ANH4+ NH4+

BNH4+ NO2-

CNO2- NH4+

DNO2- NO2-

✓ Correct answer

C: NO2- NH4+

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2021 Paper 1 Variant 1, question 20.

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