The dipole moment of AX3,BX3 and CY3 are 4.97×10−30,0.60×10−30 and 0.00 C.M. respectively, then the shape of molecules may be :
A
pyramidal, T-shape, trigonal planar
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B
pyramidal, trigonal planar, T-shape
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C
T-shape, pyramidal, trigonal planar
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D
pyramidal, T-shape, linear
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Solution
The correct options are A pyramidal, T-shape, trigonal planar B T-shape, pyramidal, trigonal planar The shape of the molecules AX3,BX3 and CY3 can be either Pyramidal, T-shape, trigonal planar or T-shape, pyramidal, trigonal planar.
CY3 has zero dipole moment in which all the bond dipoles cancel each other. Thus, it has trigonal planar geometry.
Other molecules have non zero dipole moment and have either pyramidal or T-shaped geometry.