Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
- 1Reactivity, Acids and Salts
Complete: acid + metal carbonate gives ...
- 2Electrolysis
In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 3Energy Changes
Using the values in the previous question, calculate the overall energy change for the reaction.
- 4Exothermic and Endothermic Reactions
State what is meant by the activation energy of a reaction.
- 5Bond Energies, Cells and Fuel Cells
State whether forming a new chemical bond requires energy or releases energy.
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Every sheet is deterministic: the same date always regenerates the same five questions. All of June 2012, including the monthly compilation PDF.