Daily Practice · GCSE Science

Daily Practice - GCSE Science

16th April 1999

5 questions · GCSE · 584 questions in this band

1
Chemical Analysis
State the reagent added, and the result, that shows a white solid contains sulfate ions.
2
Tests 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.
3
Chromatography and Instrumental Analysis
Explain why the solvent level in the container must be below the pencil baseline.
4
Chemistry of the Atmosphere
State the approximate percentage of nitrogen in today's atmosphere.
5
The Atmosphere: Evolution and Greenhouse Gases
State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.

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