A-LevelChemistryHalogen derivativesOct/Nov 2017Paper 1 Q251 Mark
Equal volumes of aqueous silver nitrate were added to separate small volumes of bromoethane and iodoethane in two test-tubes. The test-tubes were shaken. Which row about the observations made for bromoethane is correct?
Acolour of precipitate: cream, rate of reaction: faster than for iodoethane
Bcolour of precipitate: cream, rate of reaction: slower than for iodoethane
Ccolour of precipitate: yellow, rate of reaction: faster than for iodoethane
Dcolour of precipitate: yellow, rate of reaction: slower than for iodoethane
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of halogen derivatives 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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