Which of the following has maximum number of lone pairs associated with Xe?

# Which of the following has maximum number of lone pairs associated with Xe?

1. A

${\mathrm{XeO}}_{3}$

2. B

${\mathrm{XeF}}_{4}$

3. C

${\mathrm{XeF}}_{6}$

4. D

${\mathrm{XeF}}_{2}$

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### Solution:

We have

${\mathrm{XeO}}_{3}:$valence electrons $=8+3×6=26$     long pair of electrons around $\mathrm{Xe}=\frac{1}{2}\left(26-3×8\right)=1$

${\mathrm{XeF}}_{4}:$valence electrons  $8+4×7=36$           long pair of electrons around $\mathrm{Xe}=\frac{1}{2}\left(36-4×8\right)=3$

${\mathrm{XeF}}_{6}:$ valence electrons    long pair of electrons around $\mathrm{Xe}=\frac{1}{2}\left(50-6×8\right)=1$

valence electrons   long pair of electrons around

$\mathrm{Xe}=\frac{1}{2}\left(22-2×8\right)=3$

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