InterviewSolution
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InterviewSolution
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Consider the following statement in respect of Lantinanoids : (i) The basic strength of hydroxides of lanthanoids increases from `La (OH)_(3)` to `Lu (OH)_(3)`. (ii) The lanthanoid ions `Lu^(3+), Yb^(2+)` and `Ce^(4+)` are diamagnetic. Which of the statements (s) given above is /are correct ?A. 1 onlyB. 2 onlyC. Both 1 and 2D. neither 1 not 2 |
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Answer» Correct Answer - B Basic strength decreases from `La(OH)_3` to `Lu(OH)_3`. Hence, (1) is incorrect. `Ce=[Xe] 4f^1 5d^1 6s^2, Ce^(4+)=[Xe]` `Yb =[Xe]4f^14 6s^2, Yb^(2+)=[Xe] 4f^14` `Lu=[Xe] 4f^14 5d^1 6s^2, Lu^(3+)=[Xe]4f^14` |
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