A-LevelChemistryHydroxy compoundsFeb/Mar 2021Paper 1 Q381 Mark
An excess of P reacts with Q, in the presence of concentrated sulfuric acid, to form R. Effervescence is seen when a piece of sodium is added to pure R. The structure of P is shown. [Figure showing P as propan-1,3-diol] Which organic compounds could be compound Q? 1 [Structure of propanoic acid] 2 [Structure of propanone] 3 [Structure of propanal]
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of hydroxy compounds 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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