Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
- 1Alcohols, Carboxylic Acids and Polymers
Name the small molecule typically released as a by-product during condensation polymerisation.
- 2Chemical Analysis
A solid gives a lilac flame test. Name the metal ion present.
- 3Tests for Ions, Gases and Flame Tests
Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
- 4Chromatography 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.
- 5Chemistry of the Atmosphere
State the approximate percentage of nitrogen in today's atmosphere.
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