"Explain" questions — AQA GCSE Chemistry (8462)
108 questions · chemistry · View as Markdown
How to answer
WHAT + WHY. Every point paired with a because. Structure: X happens because Y. This causes Z because … Assessment Objective: AO2. Every "explain" answer on this spec is marked against exactly this pattern.
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…
- 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…
- A scientist claims that media reports about global climate change are often unreliable. Explain why scientists find it d…