Daily Practice · GCSE Science

Daily Practice - GCSE Science

14th April 1999

5 questions · GCSE · 584 questions in this band

1
Electrolysis
In the industrial extraction of aluminium, explain why the carbon anodes need to be replaced regularly.
2
Energy Changes
State whether the combustion of methane is exothermic or endothermic.
3
Exothermic and Endothermic Reactions
On a reaction profile diagram, the reactants are drawn at a higher energy level than the products. State whether the reaction is exothermic or endothermic.
4
Bond Energies, Cells and Fuel Cells
State the difference between a rechargeable cell and a non-rechargeable cell.
5
Rate and Extent of Chemical Change
State the equation for the mean rate of a reaction in terms of the quantity of reactant used.

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