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JEE Main2019Chemistry
Q.

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

  1. A

    Tl < In < Ga < Al 

  2. B

    Al < Ga < Tl < In

  3. C

    Al < Ga < In < Tl

  4. D

    Ga < Al < In < Tl 

Solution

Due to inert pair effect, as we move down the group-13 elements, stability of +1 oxidation state increases.

Correct order of stability is

Al < Ga < In < Tl

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