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JEE Main202226 Jun 2022Morning ShiftChemistryd and f Block ElementsActual

Choose the correct stability order of group 13 elements in their + 1 oxidation state.

Options

  1. AAl < Ga < In < Tl
  2. BTl < In < Ga < Al
  3. CIn < Tl < Ga < Al
  4. DGa < In < Al < Tl

Correct answer

A. Al < Ga < In < Tl

Step-by-step solution

On moving down the group, the stability of + 3   oxidation state decreases while + 1   oxidation state increases due to inert pair effect.

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