MDCAT Chemistry MCQ #580

Based on PTB bond energy values, which carbon-halogen bond requires the least energy to break during a nucleophilic substitution reaction?

MDCAT Chemistry MCQ #580

  1. Question 1

    Q1. Based on PTB bond energy values, which carbon-halogen bond requires the least energy to break during a nucleophilic substitution reaction?

    • A) C-F (467 kJ/mol)
    • B) C-Cl (346 kJ/mol)
    • C) C-Br (290 kJ/mol)
    • D) C-I (240 kJ/mol)

    Answer: C-I (240 kJ/mol)

    Explanation: C-I bond is the weakest (240 kJ/mol) because iodine has the largest atomic radius, making it the most reactive alkyl halide.