The Molecule Which Has Zero Dipole Moment Is :

Why Kaysons ?

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Question

The molecule which has zero dipole moment is :

easy

Solution

Correct option is

BF₃

Dipole moment of compound having regular geometry and same type of atoms is zero. It is vector quantity.

The zero dipole moment of BF₃ is due to its symmetrical (triangular planar) structure. The three fluorine atoms lie at the corners of an equilateral triangle with boron at the centre.

Thus the vectorial addition of the dipole moments of the three bonds gives a net sum because the resultant of any two dipole moments is equal and opposite to the third. The dipole moment of NH₃ is 1.46 D indicating its unsymmetrical structure. The dipole moment of CH₂Cl₂ (the molecule uses sp³ hybridisation but is not sytmmetric) is 1.57D.