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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
Amongst $NO^-_3 , AsO^{3-}_3 , CO^{2-}_3 , ClO^-_3 , SO^{2-}_3$ and $BO^{2-}_3 $, the non-planar species are
  • A
    $CO_{3}^{2-},SO_{3}^{2-},BO_{3}^{3-}$
  • ✓
    $AsO_{3}^{3-},ClO_{3}^{-},SO_{3}^{2-}$
  • C
    $NO_{3}^{-},CO_{3}^{2-},BO_{3}^{3-}$
  • D
    $SO_{3}^{2-},NO_{3}^{-},BO_{3}^{3-}$
✓

Answer

Correct option: B.
$AsO_{3}^{3-},ClO_{3}^{-},SO_{3}^{2-}$
b
Species  Hybridization Geometry Number of lone pairs
$NO _3^{-}$ $sp ^2$ Trigonal planar Zero
$AsO _3^{3-}$ $sp ^3$ Pyramidal One
$CO _3^{2-}$ $sp ^2$ Trigonal planar Zero
$ClO _3^{-}$ $sp ^3$ Pyramidal One
$SO _3^{2-}$ $sp ^3$ Pyramidal One
$BO _3^{3-}$ $sp ^2$ Trigonal planar Zero

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