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Which of the 3d-series of transition ele...

Which of the 3d-series of transition elements exhibits the largestn number of oxidation states and why ?

A

`3d^5 4s^1`

B

`3d^5 4s^2`

C

`3d^2 4s^2`

D

`3d^3 4s^2`

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. Which one of the following ions will exhibit colour in aqueous solutio...

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  2. The correct order of decreasing second ionisation enthalpy of Ti (22),...

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  3. Which of the 3d-series of transition elements exhibits the largestn nu...

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  4. Which one of the following ions will exhibit colour in aqueous solutio...

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  5. Which of the following pairs has the same size ?

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  6. Acidified K2Cr2O7 solution turns green when Na-2SO3, is added to it. T...

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  7. Draw lewis structure of H2S

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  8. Which of the following statements is not true?

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  9. Which of the following does not give oxygen on heating ?

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  10. Which of the following lanthanoid ions is diamagnetic ? (At. nos. Ce...

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  11. Reason of lanthanoid contraction is :

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  12. The reaction of acidified KMnO4 with H2O2 gives .

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  13. The pair of compounds that cannot exist together is :

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  14. Magnetic moment of 5.92 B.M. is given by which of the following ion ...

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  15. Gadolinium belong to 4 f series (Z=64). Which of the following is its ...

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  16. Because of lanthanoid contraction, which of the following pairs of ele...

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  17. Which one of the following statement is correct when SO2 is passed thr...

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  18. The outer shell electronic configuration of Gd (Z = 64) is

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  19. Draw lewis dot structure of PH3

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  20. The correct order of ionic radii of Y^(3+), La^(3+), Eu^(3+) and Lu^(3...

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