A-LevelChemistryCarboxylic acids and derivativesFeb/Mar 2018Paper 1 Q191 Mark

One molecule of ammonia reacts with one molecule of ethyl methanoate, HCO₂C₂H₅, to produce one molecule of methanamide, HCONH₂, and only one other molecule, X. One molecule of methanamide decomposes on heating strongly to produce one molecule of ammonia and only one other molecule, Y. What could be the identities of X and Y?

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

The correct answer is C: ethanol carbon monoxide.

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.

Aethanoic acid carbon monoxide

Bethanoic acid hydrogen cyanide

Cethanol carbon monoxide

Dethanol hydrogen cyanide

✓ Correct Answer

The correct answer is C: ethanol carbon monoxide

📋 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 2018 examination, Paper 1 Variant 2.

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