"Describe and explain" questions — AQA GCSE Chemistry (8462)
7 questions · chemistry · View as Markdown
How to answer
"describe and explain" questions from AQA GCSE Chemistry (8462). Read the rubric carefully — the marking points cluster into scientific ideas rather than free-form prose.
Sample questions
- Describe how a covalent bond is formed between two non-metal atoms and explain why simple molecular substances such as h…
- Describe how fractional distillation is used to separate crude oil into fractions, and explain why fractions collected n…
- Ethanol can be manufactured by the fermentation of sugar solutions using yeast. Describe what happens during fermentatio…
- Magnesium reacts with dilute hydrochloric acid to form magnesium chloride and hydrogen gas. Describe what happens during…
- Ethene reacts with bromine water. Describe what is observed and explain why ethene reacts in this way but ethane does no…
- A reversible reaction takes place in a closed container. After some time, the system reaches equilibrium. A student adds…
- Zinc, iron and copper are metals that can react with dilute sulfuric acid. Describe what happens when zinc is added to d…