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प्रश्न
On the basis of Lanthanoid contraction, explain the following:
Trends in acidic character of lanthanoid oxides.
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उत्तर
Acidic or basic character of oxides is related to the nature of oxides. As we move along the lanthanide series from \[\ce{La}\] to \[\ce{Lu}\], the covalent character increases.
Therefore, their basic character decreases or acidic character increases.
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संबंधित प्रश्न
Define lanthanoid contraction.
What are lanthanoids?
What are the different oxidation states exhibited by the lanthanoids?
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Write the different oxidation states of iron
What are the consequences of lanthanoid contraction?
Account for the following:
Zn, Cd and Hg are soft metals.
Explain the cause of Lanthanoids contraction.
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(i) U (Atomic no. 92)
(ii) Np (Atomic no.93)
(iii) Pu (Atomic no. 94)
(iv) Am (Atomic no. 95)
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(i) it has variable ionisation enthalpy
(ii) it has a tendency to attain noble gas configuration
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(iv) it resembles Pb4+
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Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of ______.
Write any two consequences of Lanthanoid Contraction.
The lathanide ion that would show colour is ______.
Mischmetal is an alloy consisting mainly of ______.
State a reason for the following:
La(OH)3 is more basic than Lu(OH)3.
Name an important alloy which contains some of the lanthanoid metals.
