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Which of the following would have perman...

Which of the following would have permanent dipple moment ?

A

`BF_3`

B

`SF_4`

C

`SiF_4`

D

`XeF_4`

Text Solution

Verified by Experts

The correct Answer is:
B
`BF_3` is trigonal planar, `SiF_4` is tetrahedral, while `XeF_4` is square planar. All these molecules have zero dipole moment on account of symmetrical shapes. `SF_4` has seesaw shape which is not symmetrical and, hence, has a permanent dipole moment.
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