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JEE Main levelSingle correct optionDifficulty 2 of 3ph217

Which species is isoelectronic (same number of valence electrons) and isostructural with $XeO X_{3}$ ?

A $IO X_{3} X^{-}$
B $IO X_{4} X^{-}$
C $ClO X_{4} X^{-}$
D $XeF X_{4}$

Answer: A

XeO X_{3}

has

8 + 18 = 26

valence electrons and is pyramidal (

s p^{3}

, one lone pair).

IO X_{3} X^{-}

has

7 + 18 + 1 = 26

and is also pyramidal.

IO X_{4} X^{-}

and

ClO X_{4} X^{-}

have 32 valence electrons and are tetrahedral.

XeF X_{4}

has 36 and is square planar.

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