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(D) The dipole moment of a molecule depends upon the electronegativity difference between the bonded atoms and the molecular geometry.$NH_{3}$ has a d

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$HF$

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(D) The dipole moment of a molecule depends upon the electronegativity difference between the bonded atoms and the molecular geometry.$NH_{3}$ has a dipole moment of $1.47 \ D$.$NF_{3}$ has a dipole moment of $0.23 \ D$.$CO$ has a dipole moment of $0.122 \ D$.$HF$ has a dipole moment of $1.78 \ D$.Comparing these values,$HF$ has the highest dipole moment due to the large electronegativity difference between $H$ and $F$ atoms.Therefore,the correct option is $(D)$.

The molecule with the highest dipole moment among the following is

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