Arrange the following diatomic molecules in order of decreasing bond polarity.?

NetherCraft 0

HBr,CO,ICI,H2

Rank values from largest to smallest

2 Answers

  • Dipole moments (2012 CRC Handbook 9-52) H-Br = 0.83, I-Cl = 1.24, CO = 0.11D; H-H of course has no dipole moment. So the order is ICl > HBr > CO> H2.

    The small dipole moment in CO arises from the nature of the bonding in :C≡O:. In fact the C atom carries the partial -ve charge!

  • CO, HBr, ICl, H2

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