A-LevelChemistryHydroxy compoundsMay/June 2025Paper 1 Q321 Mark
Four reagents are listed. 1 aqueous KCl 2 dilute HCl 3 liquid SOCl2 4 solid PCl5 Which reagents, when added to ethanol, will rapidly produce a gas that turns blue litmus red?
A1 and 2
B1 and 3
C2 and 4
D3 and 4
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of hydroxy compounds 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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