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K(2)PtCl(6) compound whereas correspondi...

`K_(2)PtCl_(6)` 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 ionisation energies of Pt is less than that of Ni.
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MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-CONCEPTUAL QUESTION
  1. Giving reasons indicate which one of the following would be coloured ?...

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

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  3. K(2)PtCl(6) compound whereas corresponding Ni compound is not known. E...

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  4. The standard reduction potentials of Co^(2+) and Co^(3+) are -0.28 V ...

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  5. The sum of IE(1) and IE(2) and those of IE(3) and IE(4) in (kJ mol^(-1...

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  6. Which of the two ferrous or ferric ion has larger magnetic moment and ...

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  7. which metal in the first series of transition metals exhibits +1 oxid...

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  8. Name the following: (i) Divalent ion of first transition series h...

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  9. The melting and boiling points of Zn, Cd and Hg are low. Why?

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  10. What may be the stable oxidation state of the transition element with ...

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  11. Name the transition element which does not exhibit variable oxidation ...

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  12. Fe^(3+) compounds are more stable than Fe^(2+) compounds because

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  13. How would you account for the increasing oxidising power in the series...

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  14. On the basis of the standard electroe potential values stated for acid...

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  15. Chromium is a typical hard metal while mercury is a liquid.

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  16. Silver is a transition metal but zinc is not.

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  17. The magnetic moments of few transition metal ions are given below : ...

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  18. (i) On the basis of the standard electrode potential values stated for...

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  19. (a) Why do transition elements show variable oxidation states? (i) N...

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  20. When MnO2 is fused with KOH in the presence of KNO3 as an oxidising a...

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