A-LevelChemistryNitrogen and sulfurFeb/Mar 2023Paper 1 Q11 Mark
Four equations representing reactions of nitrogen or one of its compounds are given. Which equation represents a disproportionation reaction?
A2HNO3 + CaCO3 → Ca(NO3)2 + CO2 + H2O
BN2 + 3H2 → 2NH3
CNH4Cl + NaOH → NH3 + NaCl + H2O
D2NO2 + H2O → HNO3 + HNO2
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of nitrogen and sulfur within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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