Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
- 1Chemical Analysis
State the reagent added, and the result, that shows a white solid contains sulfate ions.
- 2Tests 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.
- 3Chromatography and Instrumental Analysis
Explain why the solvent level in the container must be below the pencil baseline.
- 4Chemistry of the Atmosphere
Name three greenhouse gases.
- 5The Atmosphere: Evolution and Greenhouse Gases
Explain, in terms of gas molecules, why methane and water vapour, as well as carbon dioxide, are described as greenhouse gases.
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