InterviewSolution
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InterviewSolution
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The correct order of ionic radii of Ce, La, Pm and Yb in +3 oxidation state isA. `La^(3+) lt Pm^(3+) lt Ce^(3+) lt Yb^(3+)`B. `Yb^(3+) lt Pm^(3+) lt Ce^(3+) lt La^(3+)`C. `La^(3+) ltCe^(3+) ltPm^(3+)lt Yb^(3+)`D. `Yb^(3+) lt Ce^(3+) ltPm^(3+) lt La^(3+)` |
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Answer» Correct Answer - B The ocerall decrease in atomic and ionic radii from `La^(3+)" to " Lu^(3+)` is called lanthanoid contraction. Hence, the correct order is `Yb^(3+) lt Pm^(3+) lt Ce^(3+) lt La^(3+)` |
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