Question

Which is Lewis base : $I_2+I^{-}\to I_3^{-}$?

• A. $I_2$
• B. $I_3^{-}$
• C. $I^{-}$
• D. None of these

Answer 1

The correct option is C $I^{-}$

$I_2+I^{-}\to I_3^{-}$

Electron donors are Lewis bases. In this reaction $I^{-}$ donates a pair of electrons to $I_2$ to form $I_3^{-}$

$\therefore I^{-}$ is Lewis base.