4-mark practice questions — AQA GCSE Chemistry (8462)
152 questions · chemistry · View as Markdown
How to answer
4-mark questions are the shortest levels-of-response band. Aim for four scientific ideas, each in its own short sentence.
Sample questions
- Explain how increasing the surface area of a solid reactant increases the rate of reaction.
- A factory produces a batch of painkiller tablets. A quality control technician uses paper chromatography to check whethe…
- Describe the differences between catalytic cracking and steam cracking.
- Iron reacts with sulfur to form iron sulfide. The equation for this reaction is: Fe + S → FeS. Explain why the mass of i…
- Explain why a life cycle assessment (LCA) is not a purely objective process.
- Explain how an ionic bond is formed when sodium reacts with chlorine. Include in your answer the charges of the ions for…
- Explain how adding a catalyst increases the rate of a chemical reaction.
- Titanium dioxide nanoparticles are used in some sunscreen products. Explain why manufacturers choose to use titanium dio…