A-LevelChemistryReaction kinetics9701/12 · Oct/Nov 2019 · Q11 Mark
The diagram shows a Boltzmann distribution of the energies of gaseous molecules and the activation energies, Ea, of a reaction with and without a catalyst. [Figure 1.1]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
AIf the temperature of the gas is increased, the maximum of the curve becomes higher.
BIf the temperature of the gas is increased, the maximum of the curve moves to the left.
CThe fraction of molecules that react in the presence of a catalyst is shown by [symbol of vertically striped rectangle]
DThe fraction of molecules that react in the absence of a catalyst is shown by [symbol of diagonally striped rectangle]
✓ Correct answer
D: The fraction of molecules that react in the absence of a catalyst is shown by [symbol of diagonally striped rectangle]
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