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Q.

In which of the following molecules I ions are all the bonds not equal

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a

BF4−

b

SF4

c

SiF4

d

XeF4

answer is B.

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Detailed Solution

We have:

 No. of valence electronsLone pairs around the central atomArrangement of lone pairs
BF4−                                                324Tetrahedral
SF4     345Trigonal bipyramide
SiF4   324Tetrahdral
XeF4  366Octahedral (geometry: square planar)

In SF4 , all bonds will not be identical as its structure is

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