What this practice covers
These questions are drawn from past CIE 0620 Chemistry papers and filtered to naming organic compounds. You answer, you find out immediately whether you were right, and you get the reasoning for the correct option and for each distractor. Wrong answers go to a mistakes locker so you can come back to exactly those.
Practice is free. You need an account only so your progress and your mistakes are still there next time.
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What examiners see students get wrong here
These are the errors that cost marks on naming organic compounds, taken from our own topic notes. Read them before you practise and you will recognise the traps in the questions.
- Naming CH₃CH₂COOH as butanoic acid by forgetting that the COOH carbon counts.
- Writing ethanoic acid as CH₃CHO, which is an aldehyde, or as CH₃COH.
- Numbering from the wrong end and producing propan-3-ol or but-3-ene.
- Putting a position number on ethanol, ethene or any carboxylic acid.
- Reversing an ester name, so that ethanol and methanoic acid are said to give methyl ethanoate.
- Assuming "butene" is one compound. Without a number it could be but-1-ene or but-2-ene.
Revise it first
If any of the above is unfamiliar, work through the notes before practising: Naming organic compounds revision notes.