Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
9th September 2025
- 1Alcohols, Carboxylic Acids and Polymers
Name the carboxylic acid produced when ethanol is oxidised.
- 2Chemical Analysis
State the reagent added, and the result, that shows a white solid contains sulfate ions.
- 3Tests for Ions, Gases and Flame Tests
Explain how the sodium hydroxide test distinguishes aluminium ions from calcium ions, given that both give a white precipitate.
- 4Chromatography and Instrumental Analysis
Explain why the solvent level in the container must be below the pencil baseline.
- 5Chemistry of the Atmosphere
State the approximate percentage of nitrogen in today's atmosphere.
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