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MHT CET Medical202625 April 2026Morning ShiftChemistryChemical Bonding and Molecular StructureActual

Which of the following bonds is expected to be the most polar?

Options

  1. AC--H
  2. BC--C
  3. CC--O
  4. DC--N

Correct answer

C. C--O

Step-by-step solution

The polarity of a covalent bond is directly proportional to the electronegativity difference between the two bonded atoms. The electronegativity values of the given elements on the Pauling scale are approximately: C = 2.5 H = 2.1 N = 3.0 O = 3.5 Calculating the electronegativity difference ( EN ) for each bond: C--H : EN = 2.5 - 2.1 = 0.4 C--C : EN = 2.5 - 2.5 = 0 C--O : EN = 3.5 - 2.5 = 1.0 C--N : EN = 3.0 - 2.5 = 0.5 Since the electronegativity difference is maximum for the C--O bond, it is the most polar among t

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