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Daily Practice · GCSE Science

Daily Practice - GCSE Science

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2nd March 1998

5 questions · GCSE · 584 questions in this band

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  1. 1
    Chemical Analysis

    Give one piece of evidence that a solid sample is impure, based on its melting behaviour.

  2. 2
    Tests for Ions, Gases and Flame Tests

    Describe the test, and the positive result, for ammonium ions.

  3. 3
    Chromatography and Instrumental Analysis

    Write the formula for calculating an Rf value.

  4. 4
    Chemistry of the Atmosphere

    Explain, in terms of infrared radiation, how greenhouse gases keep the Earth warm.

  5. 5
    The Atmosphere: Evolution and Greenhouse Gases

    Explain, in one sentence, why the oceans were able to form only after the early Earth had cooled.

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