Daily Practice

GCSE Science

21st May 1987

5 questions · GCSE · 584 questions in this band

1
Electrolysis
State the two materials commonly used as inert electrodes in electrolysis, and explain why they must be inert.
2
Energy Changes
Using the values in the previous question, calculate the overall energy change for the reaction.
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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