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4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry4. Chemical bonding and molecular structure1 Mark
MCQ
Based on $VSEPR$ model, match the xenon compounds given in $List-I$ with the corresponding. geometries and the number of lone pairs on xenon given in $List-II$ and choose the correct option.
$List-I$ $List-II$
($P$) $XeF _2$ ($1$) Trigonal bipyramidal and two lone pair of electrons
($Q$) $XeF _4$ ($2$) Tetrahedral and one lone pair of electrons
($R$) $XeO _3$ ($3$) Octahedral and two lone pair of electrons
($S$) $XeO _3 F _2$ ($4$) Trigonal bipyramidal and no lone pair of electrons
  ($5$) Trigonal bipyramidal and three lone pair of electrons
  • A
    $P-5, Q-2, R-3, S-1$
  • ✓
    $P-5, Q-3, R-2, S-4$
  • C
    $P-4, Q-3, R-2, S-1$
  • D
    $P-4, Q-2, R-5, S-3$
✓

Answer

Correct option: B.
$P-5, Q-3, R-2, S-4$
b
$XeF _2 \Rightarrow 2$ sigma bonds and $3$ lone pairs on $Xe$, number of hybrid orbitals $=5, sp ^3 d$ hybridisation, geometry will be trigonal bipyramidal.

$P-5$

$XeF _4 \Rightarrow 4$ sigma bonds and $2$ lone pairs on $Xe$, number of hybrid orbitals $=6, sp ^3 d ^2$ hybridisation , geometry will be octahedral.

$Q-3$

$XeO _3 \Rightarrow 3$ sigma bonds and $1$ lone pairs on $Xe$, number of hybrid orbitals $=4$, $sp ^3$ hybridisation , geometry will be tetrahedral.

$R-2$

$XeO _3 F _2 \Rightarrow 5$ sigma bonds and $0$ lone pairs on $Xe$, number of hybrid orbitals $=5, sp ^3 d$ hybridisation , geometry will be trigonal bipyramidal.

$S-4$

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