# 5-mark practice questions — WJEC A-Level Chemistry (Wales)

> 165 questions · chemistry

## How to answer

5-mark questions typically award marks for structured argument: two ideas + linked because + specific example + conclusion.

## Sample questions

1. [Sodium and potassium are both elements in Group 1 of the periodic table. When a small piece of potassium is placed on co…](https://www.gradenine.co.uk/q/sodium-and-potassium-are-both-elements-00031907)
2. [A pharmacist is checking whether a batch of a pain-relief tablet is a pure compound or a mixture. She dissolves a small …](https://www.gradenine.co.uk/q/a-pharmacist-is-checking-whether-a-00637120)
3. [Bromoethane can undergo a substitution reaction with potassium cyanide solution to form a new organic compound. Describe…](https://www.gradenine.co.uk/q/bromoethane-can-undergo-a-substitution-reaction-013aaa30)
4. [Cyclohexene and benzene are both cyclic hydrocarbons with the molecular formula suggesting multiple carbon–carbon bonds.…](https://www.gradenine.co.uk/q/cyclohexene-and-benzene-are-both-cyclic-02ffe6f0)
5. [A student carries out oxidation reactions on two unknown organic compounds, X and Y. Compound X is oxidised by acidified…](https://www.gradenine.co.uk/q/a-student-carries-out-oxidation-reactions-03d781aa)
6. [Alkanes and alkenes are two families of hydrocarbons. Describe how bromine water can be used to distinguish between an a…](https://www.gradenine.co.uk/q/alkanes-and-alkenes-are-two-families-05dc3107)
7. [Ethanoic acid is a carboxylic acid. Explain what happens when ethanoic acid is added to sodium carbonate solution, and d…](https://www.gradenine.co.uk/q/ethanoic-acid-is-a-carboxylic-acid-06d50612)
8. [A technician is investigating three paint samples — paint P, paint Q and paint R. He carries out paper chromatography on…](https://www.gradenine.co.uk/q/a-technician-is-investigating-three-paint-0a1033fa)

## 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)
- [Practise with AI marking (free)](https://www.gradenine.co.uk/start)