Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
19th February 2019
- 1Tests for Ions, Gases and Flame Tests
Why must dilute nitric acid be added before silver nitrate solution when testing for a halide ion?
- 2Chromatography and Instrumental Analysis
A sample produces only one spot when run in three different solvents. What does this suggest about the sample?
- 3Chemistry of the Atmosphere
Name the two gases released in large amounts by volcanic activity that formed most of the Earth's early atmosphere.
- 4The Atmosphere: Evolution and Greenhouse Gases
Describe, in terms of wavelength, the difference between the radiation the Earth receives from the Sun and the radiation it re-emits from its surface.
- 5Climate Change and Atmospheric Pollutants
Explain how solid carbon particulates released by combustion can cause global dimming.
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