Question

Which of the following factors affects a reaction rate the most?

A) activation energy
B) whether one or two reactant molecules are required
C) relative energy in reactant and product molecules
D) relative masses of reactant and product molecules

Answer 1

The correct option is A

Step-by-step explanation:

Activation energy is the minimum amount of energy required for a reaction to occur. If the activation energy is high, it takes a longer time for the reaction to occur and when the activation energy is low, it takes a shorter time for the reaction to occur. It is on this principle that catalyst works. A catalyst is a substance that reduces the activation energy of a reaction thereby increasing the rate of a reaction and reducing the time it takes for the reaction to occur.

Answer 2

I think the correct answer is option A. Among the factors given, the factor that affects the reaction rate the most is the activation energy. Activation energy is the energy required to allow the reaction to occur. It is an important parameter in determining reaction rates.