Daily Practice

GCSE Science

5th February 1981

5 questions · GCSE · 584 questions in this band

1
Electrolysis
Aqueous copper sulfate solution is electrolysed using inert graphite electrodes. State the products formed at (a) the cathode and (b) the anode, giving a reason for each.
2
Energy Changes
Explain, in terms of bonds, why breaking bonds is an endothermic process.
3
Exothermic and Endothermic Reactions
State the energy transfer that occurs during an endothermic reaction.
4
Bond Energies, Cells and Fuel Cells
State the two substances that react inside a hydrogen fuel cell.
5
Rate and Extent of Chemical Change
State what is meant by a catalyst.

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