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Chemical Bonding and Molecular Structure — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryChemical Bonding and Molecular Structure3 Marks
Question
  1. Explain the shape of $\text{I}^-_3$ ion.
  2. Why is $\mathrm{KO}_2$ paramagnetic?
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Answer

  1. ‘l' atom has 7 valence electrons. It forms one covalence bond with another iodine atom and coordinate bond with lion in which empty orbital accepts a lone pair. The central atom has 2 bonded pair and 3 lone pair it is linear.
  1. $\mathrm{KO}_2$ is paramagnetic because $\text{O}^-_2$ has one unpaired electron.
$\text{O}^-_2(17)=\sigma\text{l}^2\ \sigma*\text{ls}^2\ \sigma2\text{s}^2\ \sigma*\text{2s}^2\ \sigma\text{2p}_\text{z}^2\ \pi2\text{p}_\text{x}^2\ \pi2\text{p}_\text{y}^2\ \pi*2\text{p}_\text{x}^2\ \pi*\text{2p}_\text{s}^1$

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