Daily Practice

GCSE Science

15th September 1987

5 questions · GCSE · 584 questions in this band

1
Tests for Ions, Gases and Flame Tests
Why must dilute nitric acid be added before silver nitrate solution when testing for a halide ion?
2
Chromatography and Instrumental Analysis
A sample produces only one spot when run in three different solvents. What does this suggest about the sample?
3
Chemistry of the Atmosphere
State the approximate percentage of nitrogen in today's atmosphere.
4
The Atmosphere: Evolution and Greenhouse Gases
State two long-term stores of carbon that removed carbon dioxide from the early atmosphere.
5
Climate Change and Atmospheric Pollutants
Explain how solid carbon particulates released by combustion can cause global dimming.

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