A-LevelChemistryHydroxy compoundsMay/June 2017Paper 1 Q241 Mark

A sample of 2.76 g of ethanol was mixed with an excess of aqueous acidified potassium dichromate(VI). The reaction mixture was then boiled under reflux for one hour. The required organic product was then collected by distillation. The yield of product was 75.0%. Which mass of product was collected?

Q: What is the correct answer to this A-Level Chemistry question?

The correct answer is D: 2.70 g.

Q: What topic does this question test?

This question tests Hydroxy compounds in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

A1.26 g

B1.98 g

C2.07 g

D2.70 g

✓ Correct Answer

The correct answer is D: 2.70 g

📋 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...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Chemistry Question

Topic

This multiple-choice question tests Hydroxy compounds in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry May/June 2017 examination, Paper 1 Variant 2.

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