MCQ Solution: P – Block Elements
The relative stability of the different oxidation state is an example of
1) redox potential
2) disproportionation
3) inert pair effect
4) electron-affinity
SOLUTION
As we go down the group, stability of lower oxidation state increases and that of higher state decreases. Thus, Tl+ > In+ > Ga+
Ga2+ > In3+ > Tl3+
Ga3+ > Ga+
Tl+ > Tl3+
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