Which will cause and increase in the reaction rate between molecules?

A. Molecules have strong internal bonding

B. Molecules collide more frequently

C. Electrons in the bonds remain in a meta-stable state

D. Electrons do not have enough energy to leave the bonds

Which will cause an increase in the reaction rate between molecules? Which change would likely cause the greatest increase in the rate of the reaction? A change in which factor will affect the rate of reaction only when gases are involved? increasing the number of molecules that have sufficient kinetic energy to react.