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The p-Block Elements

Group 18 Elements - Xenon Compounds

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VSEPR Shapes of Xenon Compounds

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1 The p-Block Elements Medium

Match List-I with List-II.

Pick the matching item from Column II for each row.
Column I
- A. $\text{XeO}_3$ Match for A
- B. $\text{XeF}_2$ Match for B
- C. $\text{XeOF}_4$ Match for C
- D. $\text{XeF}_6$ Match for D
Column II
- I. $sp^3d$, linear
- II. $sp^3$, pyramidal
- III. $sp^3d^3$, distorted octahedral
- IV. $sp^3d^2$, square pyramidal
Correct answer: A → II, B → I, C → IV, D → III

$\text{XeO}_3$: $sp^3$ pyramidal; $\text{XeF}_2$: $sp^3d$ linear; $\text{XeOF}_4$: $sp^3d^2$ square pyramidal; $\text{XeF}_6$: $sp^3d^3$ distorted octahedral.

Hybridization and shapes of xenon compounds: 1. $\text{XeO}_3$: 3 $\sigma$ bonds + 1 lone pair = 4 steric number $\implies sp^3$, trigonal pyramidal (II). 2. $\text{XeF}_2$: 2 $\sigma$ bonds + 3 lone pairs = 5 steric number $\implies sp^3d$, linear (I). 3. $\text{XeOF}_4$: 5 $\sigma$ bonds + 1 lone pair = 6 steric number $\implies sp^3d^2$, square pyramidal (IV). 4. $\text{XeF}_6$: 6 $\sigma$ bonds + 1 lone pair = 7 steric number $\implies sp^3d^3$, distorted octahedral (III). Hence, A-II, B-I, C-IV, D-III.