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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
The geometrical arrangement of orbitals and shape of $I_3^-$ are respectively
  • ✓
    trigonal bipyramidal geometry, linear shape
  • B
    hexagonal geometry, $T-$ shape
  • C
    triangular planar geometry, triangular shape
  • D
    tetrahedral geometry, pyramidal shape
✓

Answer

Correct option: A.
trigonal bipyramidal geometry, linear shape
a
The central iodine atom undergoes sp ${ }^{3} \mathrm{d}$ hybridization and has 3 lone pairs of electrons and 2 bond pairs of electrons.

Thus, I ${ }_{3}^{-}$ has trigonal bipyramidal geometry and linear shape.

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