4
QuizMultiple Choice

Reaction Rate

Question 4 • Foothill-B Period-Chemistry-26/27B

Which applies to the collision theory?

Answer
A
Particles need to collide in order to react.
B
Particles may obtain successful collisions in any molecular orientation.
C
Temperature increase causes kinetic energy of particles to decrease.
D
Reactions do not have to begin with collision of molecules or particles.

Explanation

Collision theory states that reacting particles must collide for a reaction to occur. Not every collision is successful: particles generally need enough energy and a suitable orientation. Increasing temperature raises particles’ average kinetic energy, so choice C is incorrect.

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