1.

Decresis order of reducing properties of Ln^(3+)

Answer»

`EU^(3++ )gt Tb ^(3+)gt DY ^(3+)gt GD^(3+)`
`Eu ^(3+)gtGd ^(3+) gt Tb^(3+) gt Dy^(3+)`
`Eu ^(3+) gt Dy ^(3+)gtGd ^(3+)gt Tb^(3+)`
`Dy ^(3+)gt Eu ^(3+) gt Tb^(3+)gt Gd^(3+)`

Solution :Reducing PROPERTY of `Gd^(3+)` is kless due to stable `4f^(7)` configuration


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