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Question

Which of the following has a permanent dipole moment?

A
SiF4
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B
XeF4
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C
BF3
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D
SF4
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Solution

The correct option is D SF4
For permanent dipole moment, we have to check the resultant dipole moment vectors in each case.

SiF4 - tetrahdral, symmterical.
So, the resultant dipole moment vector is zero μ=0.

SF4 - see saw shaped.
So, the resultant dipole moment vector is non zero μ0.

XeF4 - square planar, symmterical.
So, the resultant dipole moment vector is zero μ=0.

BF3 - trigonal planar, symmterical.
So, the resultant dipole moment vector is zero μ=0.








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