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Name a lanthanoid that exhibits + 4 oxid...

Name a lanthanoid that exhibits + 4 oxidation state.

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Cerium (ce) exhibits + 4 oxidation state. `Ce^(4+)([Xe]4f^(0))` has an electronic configuration similar to that of a noble gas and hence, is highly stable.
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Name the members of the lanthanoid series which exhibit + 4 oxidation states and those which exhibit + 2 oxidation states. Try to correlate this type of behaviour with the electronic configurations of these elements.

Can lanthanum (Z = 57) exhibit + 4 oxidation state ?

Which element of lanthanoid shows +4 oxidation state?

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

Identify the element that exhibits only Positive oxidation state .

Identify the element that exhibits only negative oxidation state .

Which metal in the first series of transition metals exhibits + 1 oxidation state most frequently and why ?

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Compare the chemistry of the actinoids with that of lanthanoids with reference to : oxidation states

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CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -QUESTION - ANSWER ZONE FOR BOARD EXAMINATION (VERY SHORT ANSWER TYPE)
  1. Give one use each of niobium and tantalum.

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  2. Among Fe^(2+) and Fe^(3+), which is more stable ? Why ?

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  3. Which bivalent transition metal ion in the 3d-series is the most param...

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  4. Why is the ionic radius of Fe^(2+) less than that of Mn^(2+) ?

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  5. Name a lanthanoid that exhibits + 4 oxidation state.

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  6. Why is KMnO(4) kept in dark coloured bottles ?

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  7. What happens when the pH of K(2)Cr(2)O(7) solution is increased ? Give...

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  8. Classify the following as d-block elements, lanthanoids and actinoids ...

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  9. Which has the highest density ? Al, Mg, Cu, Ni, Fe

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  10. Substances made of copper form green coloured coating when left in moi...

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  11. The extent of actinoid contraction is more than lanthanoid contraction...

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  12. Which element is used as a 'bone nail' in surgery ?

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  13. Write the ionic equation of the disproportionation reaction of CrO(4)^...

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  14. Transition metal ions have high hydration enthalpy. Explain why ?

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  15. Name the elements of the first transition series with the highest and ...

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  16. Name the transition elements with the highest and the lowest density.

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  17. Why are transition elements poor reducing agents ?

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  18. Calculate 'spin only' magnetic moment of Fe^(3+) ion.

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  19. Which elements are called ferrous metals ?

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  20. Which elements are called platinum metals ?

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