Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
18th January 2026
- 1Alkanes, Alkenes and Crude Oil
Describe the colour change seen when an alkene is shaken with bromine water.
- 2Alcohols, Carboxylic Acids and Polymers
Name the carboxylic acid produced when ethanol is oxidised.
- 3Chemical Analysis
Which reagent is added, and in what colour change, to test for chlorine gas?
- 4Tests for Ions, Gases and Flame Tests
Why must dilute nitric acid be added before silver nitrate solution when testing for a halide ion?
- 5Chromatography and Instrumental Analysis
A sample produces only one spot when run in three different solvents. What does this suggest about the sample?
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