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  4. Which species has the maximum number of lone pair of electrons on the central atom?

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Q. Which species has the maximum number of lone pair of electrons on the central atom?

Chemical Bonding and Molecular Structure

Solution:

(a) In $ClO_3^-, Cl$ is central atom, it is $sp^3$-hybrid and on it one-lone pair of electrons (free pair of electrons) is present.
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(b) In $XeF_4, Xe$ is central atoms, it is $sp^3d^2$-hybrid and on it two lone pair of electrons are present.
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(c) In $SF_4, S$ is central atom, it is $sp^3 d$-hybrid and on it one-lone pair of electrons is present.
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(d) In $[I_3]$, $I$ is central atom, it is $sp^3 d$-hybrid and on it three lone- pair of electrons are present.
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