question_answer 100)

  Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules. Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

Answer:

   (c) Assertion is correct, but reason is incorrect.         Rate constant determined from Arrhenius equation are fairly accurate for simple and complex molecules because only those molecules which have proper orientation during collision (i.e., effective collision) and sufficient kinetic energy lead the chemical change.