Which of the following is not a possible step in a substitution reaction?

Question

Quizplus · Accepted Answer

In a substitution reaction, one atom or group of atoms is replaced by another atom or group of atoms. Steps I, II, and III involve the substitution of an atom or group in a molecule or compound. Step IV, however, involves the movement of an electron from one atom to another, which is not a characteristic of a substitution reaction. Therefore, D is not a possible step in a substitution reaction.

Which of the Following Is Not a Possible Step in a Substitution