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The largest number of oxidation states a...

The largest number of oxidation states are exhibited by the elements lying in the middle of the first row transition series. Explain.

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The largest number of oxidation states will be shown by those elements in a transition series which maximum number of unpaired electrons. Obviously largest number of oxidation states are shown by the elements in the middle of the 1st transition series as they contain maximum number of unpaired electrons.
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CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -QUESTION - ANSWER ZONE FOR BOARD EXAMINATION (SHORT ANSWER TYPE)
  1. In the quantitative volumetric analysis, why is K(2)Cr(2)O(7) preferre...

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  2. Name the product formed on heating potassium permanganate. Write the b...

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  3. Write the trends : Melting points of the transition elements in each s...

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  4. Write the trends : The atomic radius of the inner transition elements ...

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  5. What happens when KMnO(4) reacts with conc. HCl ?

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  6. What happens when hydrogen sulphide is added to acidified potassium di...

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  7. Explain why transition elements have many irregularities in their elec...

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  8. Explain why iron is a transition metal but sodium is not.

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  9. Chromium is a typical hard metal, while mercury is a liquid, Explain.

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  10. The melting and boiling points of Zn, Cd and Hg are low. How will you ...

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  11. Why are the ionisation energies of 5d-metals greater than those of 3d-...

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  12. Explain why the paramagnetic character of the elements of first transi...

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  13. The 4d and 5d-series of transition metals have more frequent metal-met...

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  14. Explain why iron has higher melting point than copper.

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  15. In permanganate ion, there is a covalency between Mn and oxygen. How w...

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  16. Explain why electronic configurations of lanthanoids are not known wit...

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  17. The electronic configurations of actinides are not known with certaint...

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  18. The largest number of oxidation states are exhibited by the elements l...

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  19. Unlike Cr^(3+), Mn^(2+), Fe^(3+) and the subsequent M^(3+) ions of 3d ...

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  20. Cobalt(II) is stable in aqueous solution but in the presence of comple...

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