Daily Practice · GCSE Science

Daily Practice - GCSE Science

1st April 1995

5 questions · GCSE · 584 questions in this band

1
Chemical Analysis
Which reagent is added, and in what colour change, to test for chlorine gas?
2
Tests for Ions, Gases and Flame Tests
Why must dilute nitric acid be added before silver nitrate solution when testing for a halide ion?
3
Chromatography and Instrumental Analysis
A sample produces only one spot when run in three different solvents. What does this suggest about the sample?
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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