"Describe" questions — OCR GCSE Chemistry A: Gateway Science (J248)
15 questions · chemistry · View as Markdown
How to answer
Say WHAT happens, in order. No reasoning. Structure: 1. First X. 2. Then Y. 3. Then Z. Assessment Objective: AO1. Every "describe" answer on this spec is marked against exactly this pattern.
Sample questions
- Describe how steam cracking is used to produce smaller, more useful molecules from crude oil fractions, and explain why …
- Describe how scientists' understanding of atomic structure changed from Dalton's model to Rutherford's nuclear model, in…
- A student is trying to identify the gases produced during an experiment. Describe the tests a student would carry out to…
- Describe how carbon dioxide emissions from human activity contribute to climate change, and explain one consequence of t…
- Describe how increasing the surface area of a solid reactant affects the rate of reaction. Use ideas about particles in …
- A water treatment plant produces drinking water from river water. The river water contains sand particles and dissolved …
- Describe how crude oil forms and explain why it is described as a finite resource.
- A student carries out electrolysis of brine (concentrated sodium chloride solution) using inert electrodes. Describe wha…