Q.

In which of the following pairs the two species are not isostructural?

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a

CO32- and NO3-

b

PCl4+and SiCl4

c

PF3 and BrF5

d

AlF63- and SF6

answer is C.

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Detailed Solution

Compounds having same structure are known as isostructural. The structure of compound depends upon the number of valence electrons.Except PF3, and BrF5 (where number of valence electrons are 40 and 42) all have same valence electrons and are isostructural
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