Select the molecule from the following which has polar bond but dipole moment is zero.

CO₂

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H₂O

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NF₃

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HCl

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Solution

The correct option is A
CO₂

In case of polyatomic molecule , C = O bond has dipole of 2.3 D. Due to linear structure, bond dipoles of two C = O bonds cancel each other.

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$B F_{3} a n d N F_{3}$ both molecules are covalent, but $B F_{3}$ is non-polar and $N F_{3}$ is polar. Its reason is

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