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# In $I_3^-$ which one is correct

$\begin{array}{1 1}(a)\;I_2\text{ is Lewis base and }I^-\text{ as Lewis acid}\\(b)\; I_2\text{ is Lewis base and }I^-\text{ as Lewis base}\\(c)\;I_3^-\text{ itself behaves as amphoteric anion}\\(d)\;I_3^-\text{ does not exist}\end{array}$

Can you answer this question?

$I_2$ is Lewis acid and $I^-$ as Lewis base.
$I_2 \leftarrow I^-$
Hence (b) is the correct answer.
answered Mar 7, 2014