MolSynapsequestion bank
MolSynapse / Question bank / General Organic Chemistry III: Reaction Intermediates / Reaction energy profiles, kinetic vs thermodynamic control
JEE Main levelOne or more correct optionsDifficulty 2 of 3g3195

For a two-step reaction in which B is a reactive intermediate, which statements are correct?

  1. AThe first step is always the rate-determining step
  2. BThe energy profile has two transition states
  3. CB lies in a local energy minimum between two transition states
  4. DA catalyst can change the of the overall reaction

Answer: B, C

An intermediate sits in a valley, so there are two peaks (one per step). The rate-determining step is the one with the highest-energy transition state, which need not be the first. A catalyst does not change .
Practice General Organic Chemistry III: Reaction Intermediates More on Reaction energy profiles, kinetic vs thermodynamic control
Previous questionNext question

More questions on Reaction energy profiles, kinetic vs thermodynamic control