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Write the reason for the statement given...

Write the reason for the statement given below: Transition elements shows variable oxidation state.

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Because the energies of (n-1) d orbitals and n s orbitals are,yery ciose. Hence all the electrons in these orbitals can participate in bonding.
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V PUBLICATION-THE d- AND f- BLOCK ELEMENTS-QUESTION BANK
  1. Potassium permanganate KMnO(4) is not a primary standard Why?

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  2. Actinoids show, a large number of oxidation states Why?

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  3. Write the reason for the statement given below: Transition elements sh...

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  4. Which of the following would be coloured? Ti^(3+),Mn^(2+),Sc^(3+),Fe^...

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  5. Why do transition elements have many irregularities in their electroni...

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  6. Which one is paramagnetic is Sc^(3+) or Cr^(4+). Why?

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  7. Which is more basic LaOH(3) or LuOH(3) . Why?

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  8. Why Sm^(2+), Eu^(2+) and Yb^(2+) in solutions 'are good reducing agen...

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  9. Why is the third ionisation energy of manganese (At No. 25) unexpected...

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  10. Write all possible oxidation states of an element having atomic number...

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  11. Why is it not advisable to dissolve KMnO(4) in conc.H(2) SO(4)

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  12. Write the electronic configuration of Gadolinium (Z = 64) and its most...

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  13. There is a covalency between Mn and Oxygen in permanganate Ion. Why?

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  14. The +3 oxidation states of lanthanum(z=57), gadolinium (z=64) and lute...

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  15. What happens when chromates are keptin acidic solution and dichromates...

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  16. What is meant by 18 carat gold?

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  17. Which divalent metal ion has maximum paramagnetic ćharacter among the ...

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  18. Write ionic equation for the reaction between Cr(2)O(7)^(2-) ions and ...

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  19. HgCl(2) and SnCl(2) can not exist together in an aqueous solution. Why...

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  20. Explain (i) A soluble of ferric chloride on standing gives a brown pre...

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