Essential Chemistry for IGCSE - Rate Of Reaction (Section 4 - No. 44)
In the context of investigating reaction rates, what does the term 'collision theory' refer to?
The theory that all reactions happen at the same speed.
The theory that reactions occur when reactant particles collide with sufficient energy.
The theory that catalysts always speed up reactions.
The theory that reactions can only occur at high temperatures.
Explanation
Collision theory states that reactions occur when reactant particles collide with enough energy.
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