Explain4 marksStandard
A student is given the IUPAC name butanenitrile. Explain how the name butanenitrile indicates both the functional group and the carbon skeleton of the compound. Deduce the molecular formula of butanenitrile.
CAIE A Level Chemistry 9701 · An introduction to organic chemistry
An introduction to organic chemistry: explain question
How this question is marked
4 marks, so the mark scheme is looking for about 4 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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