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Daily Practice

GCSE Science

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16th January 1956

5 questions · GCSE · 584 questions in this band

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  1. 1
    Moles, Formulae and Equations

    How many atoms are there in 0.5 mol of helium?

  2. 2
    Concentration, Yield and Atom Economy

    Convert 250 cubic centimetres into cubic decimetres.

  3. 3
    Chemical Changes

    State the name given to a reaction in which a substance loses electrons.

  4. 4
    Reactivity, Acids and Salts

    Explain the difference between a strong acid and a concentrated acid.

  5. 5
    Electrolysis

    In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.

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