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Which of the following actinoids is well...

Which of the following actinoids is well known to exhibit `+2` oxidation state ?

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The element Europium (Z=63) has a stable configuration `:[xe]4f^(7)5d^(0)6s^(2)`. By losing two electrons, it achieves a noble gas electronic configuration. The element therefore, exhibits +2 oxidation state in its compounds..
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DINESH PUBLICATION-D-AND -F BLOCK ELEMENTS-Question From Board Examination
  1. Why is enthalpy of atomisation is the lowest for Zn in 3d series of tr...

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  2. Why is Cr^(2+) reducing and Mn^(3+) oxidising when both have d^4 confi...

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  3. Which of the following actinoids is well known to exhibit +2 oxidation...

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  4. Why do actinoid elements show wide range of oxidation states ?

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  5. Why do the transition elements exhibit higher enthalpies of atomisatio...

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  6. (i) Write an oxidising reaction of K(2)Cr(2)O(7) in the acidic medium....

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  7. Silver atom has completely filled d orbitals (4d^(10)) in its ground s...

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  8. Explain actinoid contraction .

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  9. Why do transition elements show variable oxidation state?

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  10. Explain the following properties of transition elements. (i) Variab...

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  11. Describe the preparation of potassium dichromate from chromite ore. Wh...

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  12. (a) What is Lanthanoids contraction ? (b) What are Interstial compou...

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  13. Complete the following : 3MnO(4)^(2-)+4H^(+) to

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  14. How will you account for the following : (a) (i) The chemistry of act...

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  15. (a) How would you account for the following : (i) Actinoids contract...

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  16. (i) Account for the fact that Eu^(2+) is a strong reducing agent. (...

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  17. {:(E(M^(2+)//M)^(@),Cr,Mn, Fe, Co, Ni, Cu),(,-0.91,-1.18,-0.44,-0.28,-...

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  18. When chromite ore FeCr(2)O(4) is fuse with NaOH in presence of air, a ...

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  19. Complete the following chemical equations : (i) 8MnO(4)^(-)+3S(2)O(3...

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  20. Give reason for the following : (i) Mn shows the highest oxidation s...

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