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Daily Practice · GCSE Science

Daily Practice - GCSE Science

Biology, chemistry and physics recall, definition and calculation, drawn from every strand.

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13th January 2012

5 questions · GCSE · 584 questions in this band

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  1. 1
    Concentration, Yield and Atom Economy

    Give the formula for percentage yield.

  2. 2
    Chemical Changes

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

  3. 3
    Reactivity, Acids and Salts

    Give the ionic equation for neutralisation.

  4. 4
    Electrolysis

    State the name given to the negative electrode in electrolysis.

  5. 5
    Energy Changes

    A reaction profile shows the reactants at 150 kJ and the peak (activation energy point) at 195 kJ. Calculate the activation energy.

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