MDCAT Chemistry MCQ #628

In a bimolecular nucleophilic substitution (SN2) reaction, what is the correct order of reactivity for different classes of alkyl halides?

MDCAT Chemistry MCQ #628

  1. Question 1

    Q1. In a bimolecular nucleophilic substitution (SN2) reaction, what is the correct order of reactivity for different classes of alkyl halides?

    • A) Tertiary > Secondary > Primary.
    • B) Primary > Secondary > Tertiary.
    • C) Secondary > Primary > Tertiary.
    • D) Reactivity is equal for all classes in SN2.

    Answer: Primary > Secondary > Tertiary.

    Explanation: The order of reactivity for SN2 is 1 > 2 > 3 because bulky groups in tertiary halides block the nucleophile's approach.