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One unpaired electron in atom contribute...

One unpaired electron in atom contributes a magnetic moment of 1.1 BM. Calculate the magnetic moment of Cr. [Atomic number = 24]

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As Cr has six unpaired electrons, its magnetic moment is `6xx1.1 = 6.6` BM.
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U-LIKE SERIES-THE D-AND F-BLOCK ELEMENTS -VERY SHORT ANSWER QUESTIONS (1 mark each)
  1. Why do most transition metal ions show variable oxidation states ?

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  2. Why is Ce^(4+) in aqueous solution a good oxidising agent?

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  3. One unpaired electron in atom contributes a magnetic moment of 1.1 BM....

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  4. Why do Zr and Hf exhibit similar properties?

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  5. Name one ore of manganese and chromium.

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  6. What are the two important oxidation states of Group 6 elements of the...

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  7. In the transition series, with an increase in atomic number, the atomi...

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  8. Write the atomic number of the element in which the filling of 3d subs...

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  9. What is lanthanoid contraction ?

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  10. In permanganate ion, all the bonds between Mn and O are covalent. Give...

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  11. Which is the most stable oxidation state among lanthanoids ?

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  12. State the common characteristic of actinoids and lanthanoids which pla...

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  13. The electronic configuration of an element is 3d^(5) 4s^(2). Write its...

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  14. Why is HCl not used to acidify a permanganate solution in volumetric e...

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  15. Name the metal with tripositive charge represented by the following el...

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  16. The d-electron configuration of Mn^(2+) and Ti^(2+) is d^(5) and d^(2)...

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  17. What is the general formula by which the electronic configuration of t...

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  18. The electronic configuration of an element is 3d^(5)4s^(1). Write its ...

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  19. Out of Cr^(2+) and Cr^(3+), which one is stable in aqueous solution ?

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  20. Why are Zn, Cd and Hg normally not regarded as transition elements ?

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