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For the first row transition metals the ...

For the first row transition metals the `E^(ɵ)` value are:
`{:(underset(-1.18)(V),,underset(-0.91)(Cr),,underset(-1.18)(Mn),,underset(-0.44)(Fe),,underset(-0.28)(Co),,underset(-0.25)(Ni),underset(+0.34)(Cu)):}`
Explain the irregularity in the above values.

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The `E^(ϴ)(M^(2+)//M)` values are not regular which can be explained from the irregular variatton of ionisation enthalpies `(Delta_(1)H_(1)+Delta_(1)H_(2))` and also the sublimation enthalpies which are relatively much less for manganese and vanadium.
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NCERT-THE D AND F BLOCK ELEMENTS-Exercise
  1. For the first row transition metals the E^(ɵ) value are: {:(underset...

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  2. Write down the electronic configuration of: (i). Cr^(3+) (ii). Pm^...

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  3. Why are Mn^(2+) compounds more stable than Fe^(2+) toward oxidation to...

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  4. Explain briefly how +2 state become more and more stable in the first ...

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  5. To what extent do the electronic configurations, decide the stability ...

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

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  7. Name the oxometal anions of the first series of the transition metals ...

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  8. What is lanthanoid contraction? What are the consequences of lanthanol...

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  9. What are the characteristics of the transition elements and why are th...

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  10. In what way is the electronic configuration of the transition elements...

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  11. What are the different oxidation states exhibited by the lanthanoids?

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  12. Explain gives reason. (a) Transition metal and many of their compoun...

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  13. What are interstitial compounds? Why are such compounds well known for...

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  14. How is the variability in oxidation states of transition metals differ...

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  15. Describe the preparation of potassium dichromate from iron chromite or...

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  16. Describe the oxidising action of potassium dichromate and write the io...

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  17. Describe the preparation of potassium permanganate. How does the acidi...

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  18. For M^(2+)//M and M^(3+)//M^(2+) systems the E^(ϴ) values for some met...

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  19. Predict which of the following will be coloured in aqueous solution? ...

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  20. Compare the stability of +2 oxidation state for the elements of the fi...

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  21. Compare the chemistry of actinoids with that of the lanthanoids with s...

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