1.

Arrange \[C{{e}^{+3}},L{{a}^{+3}},P{{m}^{+3}}\] and \[Y{{b}^{+3}}\] in increasing order of their ionic radii [AIEEE 2002]

A. \[Y{{b}^{+3}}<P{{m}^{+3}}<C{{e}^{+3}}<L{{a}^{+3}}\]
B. \[C{{e}^{+3}}<Y{{b}^{+3}}<P{{m}^{+3}}<L{{a}^{+3}}\]
C. \[Y{{b}^{+3}}<P{{m}^{+3}}<L{{a}^{+3}}<C{{e}^{+3}}\]
D. \[P{{m}^{+3}}<L{{a}^{+3}}<C{{e}^{+3}}<Y{{b}^{+3}}\]
Answer» B. \[C{{e}^{+3}}<Y{{b}^{+3}}<P{{m}^{+3}}<L{{a}^{+3}}\]


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