The relative stability of +1 oxidation state of group 13 elements follows the order :
Select the correct option:
A
Tl < In < Ga < Al
B
Al < Ga < Tl < In
C
Al < Ga < In < Tl
D
Ga < Al < In < Tl
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
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
$$
\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}
$$
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