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Question

The dipole moment of HBr is 1.6×1030 cm and inter atomic spacing is 1 ˚A. The % ionic character of HBr is:

A
7
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B
10
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C
25
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D
27
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Solution

The correct option is D 10
Charge of electron(q)=1.6×1019 C
Dipole moment of HBr=1.6×1030 m
Inter-atomic spacing =1oA=1×1010 m

% of ionic character in HBr

=dipole moment of HBr×100interspacing distance ×q

=1.6×1030×1001.6×1019×1010

=10%.

Hence, option B is correct.

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