# Describe the rules used to name organic compounds from the homologous series of alkanes and alcohols, using examples to support your answer.

> Cambridge International IGCSE Chemistry (0620) — 11.2 Naming organic compounds · Describe · 4 marks

## Mark scheme (4 marks)

1. The prefix (meth-, eth-, prop-, but-) indicates the number of carbon atoms in the longest carbon chain
2. The suffix -ane indicates the compound is an alkane (single / no carbon–carbon double bonds)
3. The suffix -ol indicates the compound is an alcohol / contains an –OH (hydroxyl) group
4. Correct named example of an alkane AND a corresponding alcohol with the same carbon chain length, e.g. propane / propanol or ethane / ethanol

## Key terms

- [homologous series](https://www.gradenine.co.uk/glossary/homologous-series)
- [alkane](https://www.gradenine.co.uk/glossary/alkane)
- [alcohol](https://www.gradenine.co.uk/glossary/alcohol)

## Related

- [Revision notes for Cambridge International IGCSE Chemistry (0620)](https://www.gradenine.co.uk/learn)
- [How to answer "Describe" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
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Source: [GradeNine](https://www.gradenine.co.uk/q/describe-the-rules-used-to-name-7a6fe5fe) · Published by Druglandscape Ltd.