Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
1st December 2017
- 1Electrolysis
State the two materials commonly used as inert electrodes in electrolysis, and explain why they must be inert.
- 2Energy Changes
Give one everyday example of an endothermic process.
- 3Exothermic and Endothermic Reactions
Explain, in terms of the reaction pathway, why adding a catalyst increases the rate of a reaction without changing the overall energy change of the reaction.
- 4Bond Energies, Cells and Fuel Cells
State whether breaking a chemical bond requires energy or releases energy.
- 5Rate and Extent of Chemical Change
Explain, using collision theory, why increasing the concentration of a reactant in solution increases the rate of a reaction.
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