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K(2)PtCl(6) is a well known compound whe...

`K_(2)PtCl_(6)` is a well known compound whereas corresponding `Ni` compound is not known. Explain.

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This is because `Pt^(4+)` is more stable than `Ni^(4+)` as the sum of four ionization enthalpied of Pt is less than that of Ni.
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PRADEEP-D- AND F-BLOCK ELEMENTS-CONCEPTUAL QUESTIONS
  1. The melting and boiling points of Zn , Cd and Hg are low. Why ? Or W...

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  2. The second ionisation enthalpies of both Cr and Cu are higher than tho...

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  3. K(2)PtCl(6) is a well known compound whereas corresponding Ni compound...

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  4. Most of the transition metals do not displace hydrogen from dilute aci...

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  5. Explain why E^(@) for Mn^(3+)//Mn^(2+) couple is more positive than th...

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  6. The E^(@) value in respect of the electrodes (Z=24), manganese (Z=25) ...

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  7. Why do transition elements show variable oxidation state?

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  8. How is the variability in oxidation states fo transition metals differ...

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  9. Among lanthanoids, Ln (III) compounds are predominant. However, occasi...

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  10. How would you account for the fact that the transition metals and thei...

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  11. Why generally there is an increase in density of elements from titani...

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  12. Giving reasons indicate which one of the following would be coloured ?...

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  13. Scandium forms no coloured ions, yet it is regarded as a transition el...

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  14. A substance is found to have a magnetic moments of 3.9BM.How many unpa...

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  15. The paramagnetic character in 3d transition series elements increases ...

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  16. Decide giving reason which one of the following pairs exhibits the pr...

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  17. (a) of the ions Ag^(+),Co^(2+) and Ti^(+), which one will be coloured ...

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  18. Why are the ionisation energies of 5d elements greater than 3d element...

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  19. Describe giving reason which one of the following pairs has the proper...

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  20. Give reason for the following features of transition metal chemistry: ...

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