Daily Practice · GCSE Science

Daily Practice - GCSE Science

Biology, chemistry and physics recall, definition and calculation, drawn from every strand.

19th July 2018

5 questions · GCSE · 584 questions in this band

1
Exothermic 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.
2
Bond Energies, Cells and Fuel Cells
State whether breaking a chemical bond requires energy or releases energy.
3
Rate and Extent of Chemical Change
Explain, using collision theory, why increasing the concentration of a reactant in solution increases the rate of a reaction.
4
Rates of Reaction
Explain why increasing the surface area of a solid reactant increases the rate of a reaction.
5
Reversible Reactions and Equilibrium
State Le Chatelier's principle in your own words.

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