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Why Sm^(2+) , Eu^(2+) and Yb^(2+) ions a...

Why `Sm^(2+) , Eu^(2+) and Yb^(2+)` ions are good reducing agents , but and aqueous solution of `Ce^(4+)` is good oxidsing (Z=64) and Lutetium (Z= 7) are especially, stable . Why ?

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Why Eu^(2+) and Yb^(2+) ions in solutions are good reducing agents but an aqueous solution of Ce^(4+) is a good oxidising agent?

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RESONANCE ENGLISH-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 1
  1. Actinoid contraction is greater from element to element than lanthanoi...

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  2. The chemistry of the actinoid elements is not so smooth as that of the...

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  3. Why Sm^(2+) , Eu^(2+) and Yb^(2+) ions are good reducing agents , but ...

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  4. The transition elements have a general electronic configuration.

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  5. The atomic volume of the transition elements are low compared with ele...

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  6. The wrong statement regarding transition metals among the following is...

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  7. First IE of 5d seties element are higher than those of 3d and 4d serie...

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  8. Ionisation energies of Ni and Pt in Kjmol^(-1) are given below {:(,u...

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  9. Maximum oxidation state is shown by:

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  10. Which of the following statement is false?

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  11. Which of the following has the maximum number of unpaired d-electron?

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  12. Highest magnetic moments, shown by the transition metal ion with the ...

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  13. Magnetic moment of Cr^(+2)(Z=24),Mn^(+2)(Z=25) and Fe^(2+) (Z=26) are ...

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  14. Spin only magnetic moment of .(25)Mn^(x+)ion is sqrt(15) B.M. Then, t...

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  15. Colour in transition metal compounds in attributed to

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  16. MnO(4)^(-) is of intense pink colour, though Mn is in (+7) oxidation s...

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  17. The yellow colour of chromates changes to orange on acidification due...

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  18. The catalytic activity of transition metals and their compounds is asc...

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  19. KMnO(4) is the oxo salt of :

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  20. The solubility of silver bromide in hypo solution (excess) is due to ...

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