Question

4. Which of the following molecules does not have a net dipole moment?
(a)
H2O
(b)
NH3
(c)
BF3
(d)
BrF5

Answer 1

Answer:

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.

Answer 2

Answer:

Option B

C, dont have net dipole moment.

Explanation:

Because symmetry of surrounding atom is same and there is no lone pair.and

DIPOLE MOMENT is a vector quantity.