Daily Practice · GCSE Science

Daily Practice - GCSE Science

22nd December 1998

5 questions · GCSE · 584 questions in this band

1
Alcohols, Carboxylic Acids and Polymers
Name the two methods used to produce ethanol industrially.
2
Chemical Analysis
State the reagent added, and the result, that shows a white solid contains sulfate ions.
3
Tests for Ions, Gases and Flame Tests
Explain how the sodium hydroxide test distinguishes aluminium ions from calcium ions, given that both give a white precipitate.
4
Chromatography and Instrumental Analysis
Explain why the solvent level in the container must be below the pencil baseline.
5
Chemistry of the Atmosphere
Explain, in terms of infrared radiation, how greenhouse gases keep the Earth warm.

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