1.

The correct basicity order of the following lanthanoid ions isA. `La^(3+) gt Lu^(3+) gt Ce^(3+) gt Eu^(3+)`B. `Ce^(3+) gt Lu^(3+) gt La^(3+)gt Eu^(3+)`C. `Lu^(3+) gt Ce^(3+) gt Eu^(3+) gt La^(3+)`D. `Lu^(3+) gt Ce^(3+) gt Eu^(3+) gt Lu^(3+)`

Answer» Correct Answer - D
It is the correct order and is due to Lanthanoid contraction .
For details, consult section 11.


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