First slide

13th group or boron group

Question

The correct order of stability of +1 oxidation state of Group-13- elements follows

Moderate

A

Al < Ga <Tl < In
B

Tl < In < Ga < Al
C

Al < Ga < In < Tl
D

Ga < Al < In < Tl

Solution

The common oxidation states of Group-13-elements are +3 and +1
Down the group ‘+1’ oxidation state of elements Gradually increases
For example, ‘+1’ oxidation state of Thallium is more stable than ‘+3’ oxidation state it is due to inert pair effect.

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