A-LevelChemistryHydroxy compoundsMay/June 2022Paper 1 Q331 Mark
Primary alcohols can be oxidised to aldehydes using either acidified potassium dichromate(VI) or acidified potassium manganate(VII). The reaction mixtures change colour as the oxidising agent is reduced. What are the colour changes seen?
Agreen, orange, purple, colourless
Borange, green, colourless, purple
Corange, green, purple, colourless
Dpurple, colourless, orange, green
✓ Correct Answer
The correct answer is C. 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...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep