# "Describe" questions — WJEC A-Level Chemistry (Wales)

> 25 questions · chemistry

## How to answer

Say WHAT happens, in order. No reasoning. Structure: 1. First X. 2. Then Y. 3. Then Z. Assessment Objective: AO1. Every "describe" answer on this spec is marked against exactly this pattern.

## Sample questions

1. [Methanoic acid (HCOOH) is the simplest carboxylic acid. It is found in ant venom and reacts with a range of substances. …](https://www.gradenine.co.uk/q/methanoic-acid-hcooh-is-the-simplest-0e462eac)
2. [Ethanol (C₂H₅OH) and 1-bromopropane (CH₃CH₂CH₂Br) are both organic compounds. Describe the key structural features that …](https://www.gradenine.co.uk/q/ethanol-c-h-oh-and-1-bromopropane-ch-ch-ch-br-are-32d930a4)
3. [Proteins are large molecules that are essential for life. Describe the structure of a protein, starting from its amino a…](https://www.gradenine.co.uk/q/proteins-are-large-molecules-that-are-3fadb9f6)
4. [Butanedioic acid is a dicarboxylic acid found in unripe fruit. It reacts with sodium carbonate solution. Describe what y…](https://www.gradenine.co.uk/q/butanedioic-acid-is-a-dicarboxylic-acid-47f73e06)
5. [A pharmaceutical company produces a new painkiller tablet. Quality control chemists need to check that the tablet contai…](https://www.gradenine.co.uk/q/a-pharmaceutical-company-produces-a-new-4cc393c4)
6. [Carboxylic acids can react with alcohols to form esters in a process called esterification. Pentyl methanoate is an este…](https://www.gradenine.co.uk/q/carboxylic-acids-can-react-with-alcohols-629b22f2)
7. [A student uses crystallisation to obtain a sample of copper sulfate crystals from a copper sulfate solution. Describe th…](https://www.gradenine.co.uk/q/a-student-uses-crystallisation-to-obtain-670b15bb)
8. [A student wants to produce ethyl ethanoate, an ester, starting from ethanol and ethanoic acid. Describe how the student …](https://www.gradenine.co.uk/q/a-student-wants-to-produce-ethyl-71e222af)

## Related

- [WJEC A-Level Chemistry (Wales) revision notes](https://www.gradenine.co.uk/learn/wjec-a-level-chemistry-wales)
- [WJEC A-Level Chemistry (Wales) past papers](https://www.gradenine.co.uk/past-papers/wjec-a-level-chemistry-wales)
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