MDCAT Chemistry MCQ #680

An organic chemist needs to determine the rate of nucleophilic substitution for different halogenoalkanes. What is the correct decreasing order of their reactivity?

MDCAT Chemistry MCQ #680

  1. Question 1

    Q1. An organic chemist needs to determine the rate of nucleophilic substitution for different halogenoalkanes. What is the correct decreasing order of their reactivity?

    • A) C-I > C-Br > C-Cl > C-F
    • B) C-F > C-Cl > C-Br > C-I
    • C) C-Cl > C-I > C-Br > C-F
    • D) C-I > C-F > C-Cl > C-Br

    Answer: C-I > C-Br > C-Cl > C-F

    Explanation: Reactivity follows bond energy trends (C-I is weakest); bond polarity suggests C-F is most reactive, which is factually incorrect for substitution.