Question

The molecule which has zero dipole moment is :

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.

SIMILAR QUESTIONS

Q1

White phosphorus (P) has

Q2

Two types FXF angles are present in which of the following molecules? (X= S, Xe, C)

Q3

In which pair of species, both species do have the similar geometry?

Q4

The bond angle in AsH3 is greater than that in

Q5

Which one among the following does not have the hydrogen bond?

Q6

The hybridization state of central atom in PCl5 is

Q7

The molecule having one unpaired electrons is :

Q8

The hydrogen bond is strongest in :

Q9

The species in which the central atom uses sp2 hybrid orbitals in its bonding is :

Q10

The molecule which has pyramidal shape is :