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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3cb034

Which of the following species have the same number of lone pairs on the central atom as $XeF X_{2}$ ?

A\ce{SF4}
B\ce{I3-}
C\ce{BrF2+}
D\ce{ICl2-}

Answer: B, D

XeF X_{2}

:

(8 + 2) /2 = 5

pairs, 2 bond pairs, 3 lone pairs.

I X_{3} X^{-}

and

ICl X_{2} X^{-}

:

(7 + 2 + 1) /2 = 5

pairs, so 3 lone pairs each.

BrF X_{2} X^{+}

:

(7 + 2 - 1) /2 = 4

pairs, 2 lone pairs.

SF X_{4}

has 1 lone pair.

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