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JEE Main levelSingle correct optionDifficulty 2 of 3ph201

Which pair of species has the same number of valence electrons and the same shape?

A $IF X_{7}$ and $XeF X_{7} X^{-}$
B $ICl X_{4} X^{-}$ and $XeF X_{4}$
C $BrF X_{3}$ and $XeF X_{4}$
D $ClF X_{3}$ and $XeF X_{2}$

Answer: B

ICl X_{4} X^{-}

:

7 + 28 + 1 = 36

valence electrons, square planar;

XeF X_{4}

:

8 + 28 = 36

, square planar.

IF X_{7}

has 56 and

XeF X_{7} X^{-}

has 58 electrons.

BrF X_{3}

(28, T-shaped) and

XeF X_{4}

(36) differ, and

ClF X_{3}

(28, T-shaped) and

XeF X_{2}

(22, linear) differ.

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