(A) For an $AB_3$ molecule,if the dipole moment $\mu = 0$,the molecule must have a symmetric trigonal planar geometry where the bond dipoles cancel ea

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Zero dipole moment indicates a trigonal planar shape; non-zero indicates a trigonal pyramidal shape.

(A) For an $AB_3$ molecule,if the dipole moment $\mu = 0$,the molecule must have a symmetric trigonal planar geometry where the bond dipoles cancel each other out.If the dipole moment $\mu \neq 0$,the molecule possesses a lone pair on the central atom,resulting in a trigonal pyramidal geometry.

Class 11 Chemistry Chemical Bonding and Molecular Structure Dipole moment

Easy

If an $AB_3$ molecule (containing four atoms) has a dipole moment of zero and another has a non-zero dipole moment,what does this indicate about their shapes?

A
Zero dipole moment indicates a trigonal planar shape; non-zero indicates a trigonal pyramidal shape.
B
Zero dipole moment indicates a trigonal pyramidal shape; non-zero indicates a trigonal planar shape.
C
Both indicate a trigonal planar shape.
D
Both indicate a trigonal pyramidal shape.