Daily Practice

GCSE Science

12th March 1992

5 questions · GCSE · 584 questions in this band

1
Tests for Ions, Gases and Flame Tests
Describe the test, and the positive result, for ammonium ions.
2
Chromatography and Instrumental Analysis
Write the formula for calculating an Rf value.
3
Chemistry of the Atmosphere
Name the two gases released in large amounts by volcanic activity that formed most of the Earth's early atmosphere.
4
The 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.
5
Climate Change and Atmospheric Pollutants
Explain why carbon monoxide is dangerous even though it has no smell.

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