In which of the following pairs are the two s | vedclass

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(C) To determine if species are isostructural,we check their hybridization and geometry:$1$. $CO_3^{2-}$ and $NO_3^-$: Both have $sp^2$ hybridization

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$PF_5$ and $BrF_5$

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(C) To determine if species are isostructural,we check their hybridization and geometry:$1$. $CO_3^{2-}$ and $NO_3^-$: Both have $sp^2$ hybridization and are triangular planar.$2$. $PCl_4^+$ and $SiCl_4$: Both have $sp^3$ hybridization and are tetrahedral.$3$. $PF_5$: $sp^3d$ hybridization,trigonal bipyramidal geometry.$BrF_5$: $sp^3d^2$ hybridization,square pyramidal geometry.Since their geometries differ,they are not isostructural.$4$. $AlF_6^{3-}$ and $SF_6$: Both have $sp^3d^2$ hybridization and are octahedral.Therefore,the correct option is $C$.

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

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