Chemistry 9701 · AS & A Level · 6.1

6.1 — practice question

When two aqueous solutions are combined, the reaction between them proceeds very slowly. An effective catalyst is introduced into the mixture while the temperature remains unchanged. Which statement about this catalyst is correct?

  • AIt increases the average energy of the reactant particles.
  • BIt changes the distribution of energies of the reactant particles.
  • CIt allows a greater number of reactant particles to react per unit time.
  • DIt increases the number of reactant particles with the most probable energy.

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