Question

which topic is commonly used to explain activation energy and how chemical reactions happen?
○ reaction rate
○ collision theory
○ velocity distribution
○ spontaneous reaction

Explanation:

Collision theory explains that for a chemical reaction to occur, reactant particles must collide with sufficient energy (activation energy) and proper orientation. Reaction rate focuses on how fast a reaction occurs. Velocity distribution relates to particle speeds in a gas. Spontaneous reaction refers to reactions that occur without external energy input, not directly explaining activation energy and reaction occurrence mechanism. So collision theory is the correct choice.

Answer:

B. collision theory