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MHT CET202016 Oct 2020Evening ShiftChemistryHaloalkanes and HaloarenesActual

What is correct order of C - X bond strength in CH ₃- X ?

Options

  1. ACH ₃ ~F > CH ₃ Cl > CH ₃ Br > CH ₃ I
  2. BCH ₃ ~F > CH ₃ Br > CH ₃ Cl > CH ₃ I
  3. CCH ₃ CI > CH ₃ Br > CH ₃ I > CH ₃ ~F
  4. DCH ₃ I > CH ₃ Br > CH ₃ Cl > CH ₃ ~F

Correct answer

A. CH ₃ ~F > CH ₃ Cl > CH ₃ Br > CH ₃ I

Step-by-step solution

(D) The size of halogen atom increases from F to I , which increases the C - X bond length. Larger the size, greater is the bond length and weaker is the bond formed. Hence the order of C - X bond strength in CH ₃ X is, CH ₃ ~F > CH ₃ Cl > CH ₃ Br > CH ₃ I .

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