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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

On the basis of Lanthanoid contraction, explain the following: Trends in the stability of oxo salts of lanthanoids from La to Lu.

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प्रश्न

On the basis of Lanthanoid contraction, explain the following:

Trends in the stability of oxo salts of lanthanoids from \[\ce{La}\] to \[\ce{Lu}\].

दीर्घउत्तर
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उत्तर

The stability of Oxo salts is directly proportional to the size of atom, as we move from \[\ce{La}\] to \[\ce{Lu}\], the size of the atom decreases and hence the stability of oxo salts also decreases.

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पाठ 8: The d-and f-Block Elements - Multiple Choice Questions (Type - I) [पृष्ठ ११५]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 8 The d-and f-Block Elements
Multiple Choice Questions (Type - I) | Q 67.(ii) | पृष्ठ ११५

संबंधित प्रश्‍न

Which among the following pairs of elements is 'not' an example of chemical twins?


Name a member of the lanthanoid series which is well known to exhibit +4 oxidation state.


Compare the chemistry of actinoids with that of the lanthanoids with special reference to oxidation state.


Compare the chemistry of actinoids with that of the lanthanoids with special reference to atomic and ionic sizes.


Compare the chemistry of actinoids with that of the lanthanoids with special reference to chemical reactivity.


Write the electronic configuration of the element with the atomic number 61.


Explain effects of lanthanoid contraction.


What are the consequences of lanthanoid contraction?


Gadolinium belongs to 4f series. It’s atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?


Although +3 oxidation states is the characteristic oxidation state of lanthanoids but cerium shows +4 oxidation state also. Why?


Match the statements given in Column I with the oxidation states given in Column II.

  Column I Column II
(i) Oxidation state of Mn in MnO2 is (a) + 2
(ii) Most stable oxidation state of Mn is (b) + 3
(iii) Most stable oxidation state of  (c) + 4
  Mn in oxides is (d) + 5
(iv) Characteristic oxidation state of lanthanoids is (e) + 7

On the basis of Lanthanoid contraction, explain the following:

Nature of bonding in \[\ce{La2O3}\] and \[\ce{Lu2O3}\] .


On the basis of Lanthanoid contraction, explain the following:

Stability of the complexes of lanthanoids.


In lanthanoid the last electron enters (n - 2)f subshell where n is equal to ______.


Trivalent Lanthanoid ions such as La3+ (Z = 57) and Lu3+ (Z = 71) do not show any colour in their solution. Give a reason.


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