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  4. The geometrical arrangement and shape of I3- are respectively

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Q. The geometrical arrangement and shape of $ I_{3}^{-} $ are respectively

Jharkhand CECEJharkhand CECE 2011

Solution:

$ I_{3}^{-}\Rightarrow 2 $
2 bond pairs + 3 lone pairs =5 hybrid orbitals. Thus, hybridisation is
$ s{{p}^{3}}d $ and geometrical arrangement is trigonal bipyramidal. However, its shape is linear because of the presence of three lone pairs of electrons.

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