MDCAT Chemistry MCQ #635

MDCAT Chemistry MCQ #635

1. Question 1

   Q1. When comparing the reactivity of C-X bonds in alkyl halides, why is ethyl iodide more reactive than ethyl fluoride despite being less polar?

   • A) Bond polarity is the primary factor determining reactivity.
   • B) Bond energy is the primary factor determining reactivity.
   • C) Electronegativity is the primary factor determining reactivity.
   • D) Molecular mass is the primary factor determining reactivity.

   Answer: Bond energy is the primary factor determining reactivity.

   Explanation: Bond energy decreases down the halogen group (C-F > C-Cl > C-Br > C-I), making C-I the easiest to break and most reactive.