The energy profiles for the two possible mechanisms of the following reaction, are given below Consider the following substrates (I to IV) for the above reaction aligned & I: R ₁= R ₂= R ₃= H & II: R ₁= C ₂ H ₅ ; R ₂= R ₃= H & III: R ₁= C ₂ H ₅ ; R ₂= CH ₃ ; R ₃= H & IV: R ₁= C ₂ H ₅ ; R ₂= R ₃= CH ₃ aligned Choose the correct statement(s).

Options

1. AThe reaction mechanism changes from the one shown in Figure Y to that in Figure X , as one changes the substra
2. BConsidering the mechanism corresponding to Figure X for substrates I to IV, the correct order of E is: E_ I E_
3. CThe reaction for substrate I follows 2^ nd order kinetics and that for IV follows 1^ st order kinetics.
4. DIf CN ⁻ is taken in large excess, it is difficult to ascertain if the reaction follows mechanism corresponding