Question

What may be the geometry of molecule if $A{X}_3$ molecule has non-zero dipole moment ?

• A. Trigonal planar
• B. Bent T-shape
• C. Pyramidal
• D. Both (b) and (c)

Answer 1

Answer: (D)

Both (b) and (c)

(A) For trigonal planar geometry, the individual bond dipoles cancel each other. Hence the net dipole moment of the molecule will be zero.
(B) For Bent T-shape geometry, the individual dipole moments do not cancel each other. Hence, the molecule has non zero dipole moment.
(C) Similarly for pyramidal geometry, the individual dipole moments do not cancel each other. Hence, the molecule has non zero dipole moment.