Question

Which of the following would increase the rate of a chemical reaction?

A. Reducing the temperature.
B. Increasing volume.
C. Using reactants in fine, powder form, rather than large, chunky form.
D. Decreasing reactant concentration.

Answer 1

Reducing the temperature generally slows down a reaction, so that can't be the answer. Increasing the volume reduces the pressure, which in turn slows down a reaction, so that can't be it. Using reactants in fine, power form would increase surface area ( think back to your previous question.) Decreasing concentration will reduce collisions between reactants, so that can't be it.

Answer 2

Thus, your answer has to be C.