A) \[{{Y}^{3+}}<L{{a}^{3+}}<E{{u}^{3+}}<L{{u}^{3+}}\]
B) \[L{{u}^{3+}}<E{{u}^{3+}}<L{{a}^{3+}}<{{Y}^{3+}}\]
C) \[L{{a}^{3+}}<E{{u}^{3+}}<L{{u}^{3+}}<{{Y}^{3+}}\]
D) \[{{Y}^{3+}}<L{{u}^{3+}}<E{{u}^{3+}}<L{{a}^{3+}}\]
Correct Answer: B
Solution :
[b] The correct order of ionic radii is At. No. \[Lu_{71}^{3+}<Eu_{63}^{3+}<La_{57}^{3+}<Y_{39}^{3+}\] [In lanthanides ionic radii \[({{M}^{3+}})\] decreases with increase in atomic number. \[{{Y}^{3+}}\] belongs d-block].You need to login to perform this action.
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