A-LevelChemistryNitrogen and sulfurFeb/Mar 2018Paper 1 Q181 Mark
When burned, sulfur forms a gaseous product X which can be oxidised to produce a gas Y. Gas Y reacts with water to produce a product Z. Which row correctly shows the oxidation states of sulfur in X, Y and Z?
A–2 +4 +4
B–2 +4 +6
C+4 +6 +4
D+4 +6 +6
✓ 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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