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Question
Name a member of the lanthanoid series which is well known to exhibit +4 oxidation state.
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Solution
Cerium is the lanthanoid element which is well known to exhibit +4 oxidation state.
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RELATED QUESTIONS
Define lanthanoid contraction.
What are the different oxidation states exhibited by the lanthanoids?
Compare the chemistry of actinoids with that of lanthanoids with special reference to electronic configuration.
Explain effects of lanthanoid contraction.
What is meant by Lanthanide contraction? Write the general electronic configuration of inner transition elements.
Although +3 is the characteristic oxidation state for lanthanoids but cerium also shows +4 oxidation state because:
(i) it has variable ionisation enthalpy
(ii) it has a tendency to attain noble gas configuration
(iii) it has a tendency to attain f 0 configuration
(iv) it resembles Pb4+
On the basis of Lanthanoid contraction, explain the following:
Trends in the stability of oxo salts of lanthanoids from \[\ce{La}\] to \[\ce{Lu}\].
The lathanide ion that would show colour is ______.
Assertion: There is a continuous increase in size among Lanthanoids with an increase in atomic number.
Reason: Lanthanoids do not show Lanthanoid contraction.
The pair of lanthanoid ions which are diamagnetic is:
