"Explain" questions — AQA A-Level Chemistry (7405)
101 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 why cracking is an important industrial process. In your answer, refer to both the feedstock used and the produc…
- Explain how increasing the concentration of sodium thiosulfate solution increases the rate of its reaction with hydrochl…
- Explain why ammonia solution is classified as a weak base and describe how this affects the pH of a 0.1 mol/dm³ ammonia …
- A student dissolves ammonium nitrate in water. The temperature of the solution decreases. Explain why the temperature de…
- Bromine water decolourises when it reacts with propene. A student investigates how the initial concentration of bromine …
- Crude oil is described as a finite resource. Explain what is meant by the term 'finite resource' and describe the origin…
- Explain why increasing the concentration of hydrochloric acid increases the rate of reaction between hydrochloric acid a…
- Ethanol vapour can be produced by the reaction of ethene with steam in a closed container. The equation for the reaction…