Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
1st August 2026
- 1Reactivity, Acids and Salts
Complete: acid + metal carbonate gives ...
- 2Electrolysis
In the industrial extraction of aluminium, explain why the carbon anodes need to be replaced regularly.
- 3Energy Changes
A reaction profile shows the reactants at 150 kJ and the peak (activation energy point) at 195 kJ. Calculate the activation energy.
- 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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