Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
- 1Electrolysis
Concentrated sodium chloride solution (brine) is electrolysed using inert electrodes. State the products formed at the cathode and at the anode.
- 2Energy Changes
A reaction profile shows the reactants at 150 kJ and the peak (activation energy point) at 195 kJ. Calculate the activation energy.
- 3Exothermic and Endothermic Reactions
State the energy transfer that occurs during an endothermic reaction.
- 4Bond Energies, Cells and Fuel Cells
State the two substances that react inside a hydrogen fuel cell.
- 5Rate and Extent of Chemical Change
State what is meant by a catalyst.
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