A-LevelChemistryCarbonyl compounds9701/12 · Feb/Mar 2018 · Q391 Mark

Propanal reacts with hydrogen cyanide to form 2-hydroxybutanenitrile. A suitable catalyst for this reaction is sodium cyanide. NaCN CH₃CH₂CHO + HCN ⇌ CH₃CH₂CH(OH)CN Which statements about the reaction of propanal with hydrogen cyanide are correct? 1 HCN is a weaker nucleophile than the nucleophile provided by NaCN. 2 The reaction mechanism involves two steps. 3 The product of the reaction has a chiral carbon atom.

A1, 2 and 3 are correct

B1 and 2 only are correct

C2 and 3 only are correct

D1 only is correct

✓ Correct answer

A: 1, 2 and 3 are correct

Oracle Prep sorts past-paper questions by topic, so you can drill Carbonyl compounds and see which topics are most likely to come up next.

Topic: Carbonyl compounds, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2018 Paper 1 Variant 2, question 39.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content