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प्रश्न
Name an element of lanthanoid series which is well knwon to shown +4 oxidation state. Is it a strong oxidising agent or reducing agent?
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उत्तर
Ce(Z = 58)
Ce = 4f15d16s2
It is a strong oxidising agent.
⇒ Formationof Ce4+ is favoured because its noble gas configuration, but it is a strong oxidant due to the common +3 state. E° value Ce4+/ Ce3+ =+1.74 V
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संबंधित प्रश्न
Define lanthanoid contraction.
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Compare the chemistry of actinoids with that of the lanthanoids with special reference to atomic and ionic sizes.
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Zn, Cd and Hg are soft metals.
Explain the cause of Lanthanoids contraction.
What is meant by Lanthanide contraction? Write the general electronic configuration of inner transition elements.
On the basis of Lanthanoid contraction, explain the following:
Stability of the complexes of lanthanoids.
Why is Mn2+ ion more stable than Fe2+ ion?
(Atomic numbers of Mn = 25 and Fe = 26)
Name an important alloy which contains some of the lanthanoid metals.
