Daily Practice · GCSE Science

Daily Practice - GCSE Science

5th August 1996

5 questions · GCSE · 584 questions in this band

1
Chemical Analysis
Give one piece of evidence that a solid sample is impure, based on its melting behaviour.
2
Tests for Ions, Gases and Flame Tests
Describe the test, and the positive result, for ammonium ions.
3
Chromatography and Instrumental Analysis
Write the formula for calculating an Rf value.
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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