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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 ?

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Mn(Z=25) shows maximum no. of oxidation state As its electronic configuration is `3d^5 4s^2` . Now energy of 4s and 3d is very close, so they can loose or share unpaired electrons (3d,5 unpaired electrons). Hence it shows O.S. from +2 to +7 (+2,+3, +4, +5, +6, +7) i.e. maximum in number.
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OMEGA PUBLICATION-THE D- AND F-BLOCK ELEMENTS-MULTIPLE CHOICE QUESTIONS
  1. Which of the 3d-series of transition elements exhibits the largestn nu...

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  2. Which element belongs to d-block elements ?

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  3. The transition elements have a general electronic configuration of

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  4. The correct ground state electronic configuration of chromium atom (Z...

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  5. Which of the following electronic configuration is that of a transiti...

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  6. Which of the following elements is alloyed with copper to form brass?

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  7. Copper can be extracted from

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  8. Argentite is an ore of

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  9. The process used for the extraction of gold is

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  10. Important ore of zinc is

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  11. The inner transition elements are the elements in which the added elec...

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  12. Transition elements

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  13. The tendency of the transition elements to form coloured compounds is...

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  14. Which of the following is diamagnetic ?

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  15. The common oxidation state of the elements of lanthanide series is

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  16. Which of the following is a lanthanide ?

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  17. For the process Cu(g) to Cu^+ (g) + e^- , the electron is to be...

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  18. Paramagnetism is a property of

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  19. The first ionisation energy of silicon is lower than that of

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  20. Which of the following electronic configurations will have the lowest...

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  21. In general, the melting and boiling point of transition metals

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