Daily Practice

GCSE Science

20th January 1985

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
A solid gives a lilac flame test. Name the metal ion present.
3
Tests for Ions, Gases and Flame Tests
Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
4
Chromatography and Instrumental Analysis
In a chromatography experiment, a dye spot travels 4.5 cm and the solvent front travels 6.0 cm. Calculate its Rf value.
5
Chemistry of the Atmosphere
Give two human activities that increase the amount of greenhouse gases in the atmosphere.

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