Explain5 marksChallenge
Propanone reacts with hydrogen cyanide, using potassium cyanide as a catalyst and heat, to form a hydroxynitrile.
Explain why this reaction occurs and describe the mechanism by which the product is formed.
CAIE A Level Chemistry 9701 · Carbonyl compounds
Carbonyl compounds: explain question
How this question is marked
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
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