Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
- 1Chemical Analysis
Which reagent is added, and in what colour change, to test for chlorine gas?
- 2Tests for Ions, Gases and Flame Tests
Why must dilute nitric acid be added before silver nitrate solution when testing for a halide ion?
- 3Chromatography and Instrumental Analysis
A sample produces only one spot when run in three different solvents. What does this suggest about the sample?
- 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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