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Shape and Geometry Using VSEPR

Which of the ...

Question

Which of the following pair of species is not isostructural?

A

K r F_{2}, {I C l_{2}}^{-}

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B

S O_{3}, {S O_{3}}^{2 -}

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C

C O_{3}^{2 -}, {B O_{3}}^{3 -}

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D

S i O_{4}^{4 -}, {I O_{4}}^{-}

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Solution

The correct option is B $S O_{3}, {S O_{3}}^{2 -}$
$S O_{3}$ and $S O_{3}^{2 -}$ are not isostructural species. They are plane triangular and tetrahedral respectively. $S O_{3}$ contains 3 bonding domains and zero lone pairs of electrons. Hence, it has plane traingular geometry. $S O_{3}^{2 -}$ has 4 bonding domains and zero lone pairs of electrons. Hence, it is tetrahedral geometry.

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Q. Of the following, isoelectronic & isostructural species are:

N O_{3}^{-}, C l O_{3}, S O_{3}

C O_{3}^{2 -}

N O_{3}^{-}, A s O_{3}^{3 -} C O_{3}^{2 -}, C l O_{3}^{-}, S O_{3}^{2 -}

B O_{3}^{3 -}

, the non - planar species are:

{N O}_{3}^{-}, A s O_{3}^{3 -}, {C O}_{3}^{2 -}, {C l O}_{3}^{-}, {S O}_{3}^{2 -}

B O_{3}^{3 -}

, the non-planar species are

N O_{3}^{-}, A s O_{3}^{3 -}, C O_{3}^{2 -}, C l O_{3}^{-}, S O_{3}^{2 -}

B O_{3}^{3 -}

the non-polar species are:

Q. Which of the following are non-planar species?

N O_{3}^{-}, A s O_{3}^{3 -}, C O_{3}^{2 -}, C l O_{3}^{-}, S O_{3}^{2 -}, B O_{3}^{3 -}

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