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QAIPMT-2004-Ch-2601: NEET 2004 Chemistry - Class 11 AIPMT-2004-Ch-2601 Solution: Among the following, the pair in which the two species are not…

Among the following, the pair in which the two species are not isostructural is

Multiple Choice Options

A $SiF_4$ and $SF_4$
B $IO_3^-$ and $XeO_3$
C $BH_4^-$ and $NH_4^+$
D $PF_6^-$ and $SF_6$

Step-by-Step Verified Solution

SiF 4 has symmetrical tetrahedral shape which is due to sp 3 hybridisation of the central silicon atom in its excited state configuration. SF 4 has distorted tetrahedral or sea-saw geometry which arises due to sp 3 d hybridisation of the central sulphur atom and due to the presence of one lone pair of electrons in one of the equatorial hybrid orbital.

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