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Ionic and Covalent Character

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Question

The experimental value of dipole moment of HCl is 1.03 D. The length of H−Cl bond is 1.275 A. The percentage ionic character of HCl is:

A

43

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B

21

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C

17

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D

7

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Solution

The correct option is C 17
Percentage ionic character =μexpμcalc×100
μH−Cl=1.03 D=1.03×10−18 esu. cm
dH−Cl=1.275Ao=1.275×10−8 cm
Percentage ionic character=1.03×10−18(4.8×10−10 esu)×1.275×10−8×100=17%

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Ionic and Covalent Character

Standard XII Chemistry

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