Question

which will cause an increase in the reaction rate between molecules?
○ molecules have strong internal bonding.
○ molecules collide more frequently.
○ electrons in the bonds remain in a meta-stable state.
○ electrons do not have enough energy to leave the bonds.

Explanation:

To determine what increases reaction rate, recall collision theory: reaction rate depends on frequency and energy of molecular collisions.

• "Molecules have strong internal bonding" – strong bonds make reactions harder, not faster.
• "Molecules collide more frequently" – more collisions (with enough energy) increase reaction rate, this matches collision theory.
• "Electrons in bonds remain meta - stable" – meta - stable electrons don't promote reaction (reactions need bond breaking/forming, stable electrons hinder).
• "Electrons lack energy to leave bonds" – insufficient energy means no bond breaking, reaction rate won't increase.

Answer:

B. Molecules collide more frequently.