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JEE Advanced levelSingle correct optionDifficulty 3 of 3ph073

Which pair of species has the same shape and the same hybridisation of the central atom?

A $ICl X_{4} X^{-}$ and $BrF X_{4} X^{-}$
B $BrF X_{2} X^{+}$ and $I X_{3} X^{-}$
C $I X_{3} X^{-}$ and $BrF X_{4} X^{-}$
D $ICl X_{2} X^{-}$ and $ICl X_{4} X^{-}$

Answer: A

ICl X_{4} X^{-}

and

BrF X_{4} X^{-}

both have 4 bond pairs + 2 lone pairs (

s p^{3} d^{2}

), so both are square planar.

ICl X_{2} X^{-}

and

I X_{3} X^{-}

are

s p^{3} d

linear;

BrF X_{2} X^{+}

is

s p^{3}

bent. The other pairs differ in shape or hybridisation.

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