Chemical changes GCSE questions
Cover the answers and try these Chemical changes checks first. The full quiz in the app includes hints.
How to use these
Write your answer, then check. If you miss one, open the Chemical changes lesson before you retry.
Practice questions
Cover the answers and have a go first. Worked solutions are underneath.
Which metal is the most reactive?
Zinc displaces copper from copper sulfate because zinc is
A metal more reactive than carbon is extracted by
Phytomining extracts copper using
Common mistakes
- Do not say copper is unreactive because it is a metal. Reactivity is relative. "Bacteria get used to acid" is biology — here the metal either reacts or it does not.
- You cannot extract aluminium with carbon in a simple furnace in the same way — aluminium is more reactive than carbon.
- Concentrated is about moles per dm^3. Strong is about how fully it ionises. Say excess insoluble base, then filter — that method mark is often missed.
- Do not drink lab alkali to cancel acid. Everyday examples are carefully chosen weak bases in small amounts. Neutralisation warms slightly — it is exothermic.
Answers and working
Frequently asked questions
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