1.

The correct basicity order of thefollowing lanthanoid ions is

Answer»

`La^(3+) gt Lu^(3+) gt Ce^(3+) gt Eu^(3+)`
`Ce^(3+) gt Lu^(3+) gt La^(3+)gt Eu^(3+)`
`Lu^(3+) gt Ce^(3+) gt Eu^(3+) gt La^(3+)`
`Lu^(3+) gt Ce^(3+) gt Eu^(3+) gt Lu^(3+)`

Solution :It is the correct order and is dueto Lanthanoid CONTRACTION .
For DETAILS, consult section 11.


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