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AP EAMCET202124 Aug 2021Morning ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

The stability of +1 oxidation state increases in the sequence

Options

  1. AGa < In < Al < TI
  2. BAl < Ga < In < TI
  3. CTl < In < Ga < Al
  4. DIn < Tl < Ga < Al

Correct answer

B. Al < Ga < In < TI

Step-by-step solution

The stability of +1 oxidation state among Al, Ga , In and Tl increases in the sequence Al < Ga < In < Tl This is due to inert pair effect due to which on moving down the group, the stability of +3 oxidation state decreases while stability of +1 oxidation state increases.

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