MDCAT Chemistry MCQ #997

MDCAT Chemistry MCQ #997

1. Question 1

   Q1. A catalyst increases the rate of reaction by...

   • A) Increasing the activation energy of the reverse reaction
   • B) Providing an alternative pathway with lower activation energy
   • C) Changing the enthalpy change of the reaction
   • D) Increasing the frequency of molecular collisions

   Answer: Providing an alternative pathway with lower activation energy

   Explanation: Catalysts lower activation energy without altering enthalpy. Option D fails because catalysts do not directly affect collision frequency.