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Question

The dipole moment of a molecule AB is 1.6×1030 C.m . If intermolecular distance is 2.0×1010 m, then the percentage ionic character of AB is :

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Solution

The dipole moment for 100% ionic character will be:

μionic=q×d=1.6×1019 C×2.0×1010m

μionic=3.2×1029Cm
The percentage ionic character is =Observed dipole momentDipole moment for complete ionic character×100

=1.6×10303.2×1029×100=5%.
Hence, the percentage ionic character is 5%.
Therefore, the answer is 5.

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