Daily Practice

GCSE Science

21st November 1968

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
Name the gas that relights a glowing splint.
3
Tests for Ions, Gases and Flame Tests
State the flame test colour for sodium ions.
4
Chromatography and Instrumental Analysis
State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
5
Chemistry of the Atmosphere
Give two human activities that increase the amount of greenhouse gases in the atmosphere.

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