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The relative stability of +1 oxidation state of group 13 elements follows the order :

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The relative stability of +1 oxidation state of group 13 elements follows the order :

(1)  Ga < Al < In < Tl

(2)  Tl < Ln < Ga < Al

(3)  Al < Ga < Tl < ln 

(4)  Al < Ga < ln < Tl

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1 Answer

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Best answer

Correct option  (4) Al < Ga < ln < Tl

Explanation:

As we move down the group (13th, 14th, 15th); (Max. oxidation state-2) becomes more stable due to inert pair effect. 

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