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Daily Practice

GCSE Science

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21st July 1984

5 questions · GCSE · 584 questions in this band

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  1. 1
    Moles, Formulae and Equations

    In the equation 2H2 + O2 gives 2H2O, how many moles of water are formed from 3 mol of hydrogen?

  2. 2
    Concentration, Yield and Atom Economy

    Calculate the concentration in moles per cubic decimetre of a solution containing 0.5 mol in 250 cubic centimetres.

  3. 3
    Chemical Changes

    Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.

  4. 4
    Reactivity, Acids and Salts

    Name the salt made from zinc oxide and nitric acid.

  5. 5
    Electrolysis

    In the industrial extraction of aluminium, explain why the carbon anodes need to be replaced regularly.

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