5-mark practice questions — WJEC A-Level Chemistry (Wales)
165 questions · chemistry · View as Markdown
How to answer
5-mark questions typically award marks for structured argument: two ideas + linked because + specific example + conclusion.
Sample questions
- Sodium and potassium are both elements in Group 1 of the periodic table. When a small piece of potassium is placed on co…
- A pharmacist is checking whether a batch of a pain-relief tablet is a pure compound or a mixture. She dissolves a small …
- Bromoethane can undergo a substitution reaction with potassium cyanide solution to form a new organic compound. Describe…
- Cyclohexene and benzene are both cyclic hydrocarbons with the molecular formula suggesting multiple carbon–carbon bonds.…
- A student carries out oxidation reactions on two unknown organic compounds, X and Y. Compound X is oxidised by acidified…
- Alkanes and alkenes are two families of hydrocarbons. Describe how bromine water can be used to distinguish between an a…
- Ethanoic acid is a carboxylic acid. Explain what happens when ethanoic acid is added to sodium carbonate solution, and d…
- A technician is investigating three paint samples — paint P, paint Q and paint R. He carries out paper chromatography on…