1.

Among the following pairs of ions, the lower oxidation state in aqueous solution is more stable than the other , in

Answer»

`Tl^(+),Tl^(3+)`
`Cu^(+),Cu^(2+)`
`Cr^(2+),Cr^(3+)`
`V^(2+), VO^(2+)`

Solution :`Tl^(+)`is more STABLE than `Tl^(3+)`due to invertpair effect ( Tl belongs to Group 13 and is the last element of the Group ).


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