A-LevelChemistryCarboxylic acids and derivativesFeb/Mar 2019Paper 1 Q291 Mark

1 mole of each of the following four compounds is reacted separately with: • an excess of sodium • an excess of sodium carbonate. Which compound produces the same volume of gas with each of the two reagents?

Q: What topic does this question test?

This question tests Carboxylic acids and derivatives in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Aprimary alcohol structure (propan-1-ol).

Bcarboxylic acid structure (propanoic acid).

Cphenol structure.

Dtertiary alcohol structure (2-methylpropan-2-ol).

✓ Correct Answer

The correct answer is D: tertiary alcohol structure (2-methylpropan-2-ol).

📋 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 Carboxylic acids and derivatives in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry Feb/Mar 2019 examination, Paper 1 Variant 2.

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