Question

For a certain reaction a large fraction of molecules has energy more than the threshold energy, still the rate of reaction is very slow. The possible reason for this could be that

• A. The colliding molecules could be large in size
• B. The colliding molecules must not be properly oriented for effective collisions
• C. The rate of reaction could be independent of the energy
• D. One of the reactants could be in excess

Answer 1

Answer: (B)

The colliding molecules must not be properly oriented for effective collisions

Answer 2

Apart from energy consideration the colliding molecules should have proper orientation for effective collisions.