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Why does Ga (+1) undergo disproportionat...

Why does Ga (+1) undergo disproportionation reaction?

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Due to inert pair effect, gallium exhibits both + 1 and +3 oxidation states. However, the +3 oxidation state of gallium is more stable than its + 1 oxidation state. For this reason, Ga ( + 1) undergoes disproportionation reaction ( self oxidation- reduction) to form gallium metal & the more stable `Ga^(3+)` ion in aqueous solution.
`overset(+1)(3GaX)(s)to 2overset0Ga(s) +overset(+3)Ga(aq) + 3X^(-)(aq) [x = Cl, Br, I]`
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