Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
29th March 2021
- 1Exothermic and Endothermic Reactions
State what is meant by the activation energy of a reaction.
- 2Bond Energies, Cells and Fuel Cells
State whether forming a new chemical bond requires energy or releases energy.
- 3Rate and Extent of Chemical Change
State the four factors that can increase the rate of a chemical reaction.
- 4Rates of Reaction
A tangent drawn to a volume-time graph at 15 seconds passes through the points (5 s, 6 cm3) and (25 s, 66 cm3). Calculate the rate of reaction at 15 seconds.
- 5Reversible Reactions and Equilibrium
The forward reaction of a particular reversible reaction is exothermic. State whether the reverse reaction is exothermic or endothermic.
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