Which of the following has higher bond dipole moment ?

H - C

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N - O

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P - H

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None of these

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Solution

The correct option is B $N - O$
Higher Bond dipole moment
a) $H - C = (2.20 - 2.55) = 0.35$
b) $N - O = (3.04 - 3.44) = 0.40$
c) $P - H = (2.19 - 2.20) = 0.10$
Higher the difference in electro negativity between the two atoms, higher the dipole moment.
The higher dipole is found in NO. Here bond dipole moment is 0.40

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