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Question

The dipole moment of HBr is 1.6×1030 c.m. and inter atomic spacing is 1oA. The percentage ionic character of HBr is:

A
10
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B
0
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C
15
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D
27
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Solution

The correct option is A 10
Percentage of ionic character = Observed dipole momentCalculated dipole moment×100
Observed dipole moment =1.6×1030cm
Calculated dipole moment = electron charge × interatomic distance
=1.6×1019×1010=1.6×1029cm
% of ionic character =1.6×10301.6×1029×100=10
Percentage of ionic character in HBr is 10

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