Daily Practice

GCSE Science

7th March 1989

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
Explain, in terms of bonds, why breaking bonds is an endothermic process.
3
Exothermic and Endothermic Reactions
State what is meant by the activation energy of a reaction.
4
Bond Energies, Cells and Fuel Cells
State whether forming a new chemical bond requires energy or releases energy.
5
Rate and Extent of Chemical Change
State the four factors that can increase the rate of a chemical reaction.

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