For an elementary bimolecular gas-phase reaction , what are the strict microscopic prerequisites for — Chemical Kinetics Chemistry Question

💡 Solution & Explanation

For any single collision to successfully yield products, two strict criteria must be satisfied simultaneously: (1) The Energetic Factor: The species must collide with sufficient kinetic energy ($\ge E_a$ or Threshold Energy) to break existing bonds (A is correct). (2) The Steric Factor: They must collide with the correct geometric alignment to allow new bonds to form (B is correct). High temperatures and catalysts are macroscopic tools to increase the frequency of these effective collisions, but are not mandatory requirements for a collision itself to be effective.