Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
28th January 2024
- 1Tests for Ions, Gases and Flame Tests
A solution gives a cream precipitate when acidified with dilute nitric acid and then treated with silver nitrate solution. Name the halide ion present.
- 2Chromatography and Instrumental Analysis
Explain why the baseline is drawn in pencil rather than ink.
- 3Chemistry of the Atmosphere
State the approximate percentage of nitrogen in today's atmosphere.
- 4The Atmosphere: Evolution and Greenhouse Gases
State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
- 5Climate Change and Atmospheric Pollutants
Explain why burning a fuel can produce nitrogen oxides even if the fuel itself contains no nitrogen.
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