Daily Practice

GCSE Science

11th June 1990

5 questions · GCSE · 584 questions in this band

1
Alcohols, Carboxylic Acids and Polymers
Explain why carboxylic acids are described as 'weak acids'.
2
Chemical Analysis
State the difference between a pure substance and a formulation.
3
Tests for Ions, Gases and Flame Tests
A solution gives a cream precipitate when acidified with dilute nitric acid and then treated with silver nitrate solution. Name the halide ion present.
4
Chromatography and Instrumental Analysis
Explain why the baseline is drawn in pencil rather than ink.
5
Chemistry of the Atmosphere
Give two human activities that increase the amount of greenhouse gases in the atmosphere.

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