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Account for the following : (a) All Sc...

Account for the following :
(a) All Scandium salts are white.

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(a) Sc has only + 3 oxidation state, there is no unpaired electron.
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CBSE COMPLEMENTARY MATERIAL-The d- AND f-BLOCK ELEMENTS-SHORT ANSWER-II TYPE QUESTION
  1. Write any four differences between lanthanoids and actinoids. Lanth...

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  2. give reason for the following statement (a)separation of lanthanoid el...

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  3. (b) Transition metal exhibit higher enthalpies of atomization. Explain...

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  4. (c) Why do the transition metal have high enthalpy of hydration ?

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  5. (a) By using Hund’s rule derive the electronic configuration of Ce^(+3...

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  6. (b) Is lanthanum a f-block element ?

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  7. Account for the following : (a) Silver chloride dissolves in excess ...

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  8. Account for the following : (b) Cuprous chloride is diamagnetic whil...

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  9. Account for the following : In CrO(4)^(2-) ion , all the Cr-O bond...

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  10. The values in respect of electrodes of Cr, Mn and iron are : Cr^(+3...

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  11. Write any three properties of interstitial compounds.

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  12. Account for the following : (a) All Scandium salts are white.

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  13. Account for the following : (b) The Ist ionization energy of the 5d ...

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  14. Account for the following : (c) Ce^(+3) can be easily oxidized to Ce...

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  15. A green chromium compound (A) on fusion with alkali gives a yellow

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  16. A green chromium compound (B) which on acidification gives a orange c...

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  17. A green chromium compound (C). Identify A, B, C. Write equations for ...

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  18. When an oxide of Mn (A) is fused with KOH in the presence of an oxi...

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  19. When an oxide of Mn (B). Compound (B) disproportionate in neutral or...

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  20. When an oxide of Mn (C). Identify A, B, C.

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