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?
Aethanoic acid carbon monoxide
Bethanoic acid hydrogen cyanide
Cethanol carbon monoxide
Dethanol hydrogen cyanide
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of carboxylic acids and derivatives within the Chemistrysyllabus. The examiner's mark scheme requires...
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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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