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Why is Fe^(2+) ion smaller than Mn^(2+) ...

Why is `Fe^(2+)` ion smaller than `Mn^(2+)` ion ?

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`Fe^(2+)` ions a higher effective nuclear charge than `Mn^(2+)` ions
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State the Hund’s rule of maximum multiplicity. Wh Fe^(3+) ion is more stable than Fe^(2+) ion?

Stability of Fe^(3+) ion is greater than Mn^(3+) ion but less than Cr^(3+) - explain. [Given : E_(Cr^(2+)|Cr)^(0)=-0.9V, E_(Cr^(3+)|Cr^(2+))^(0)=-0.4V E_(Mn^(2+)|Mn)^(0)=-1.2V, E_(Mn^(3+)|Mn^(2+))^(0)=+1.5V E_(Fe^(2+)|Fe)^(0)=-0.4V, E_(Fe^(3+)|Fe^(2+))^(0)=+0.8V ]

Explain why Fe^(3+) is more stable than Fe^(2+) ion.

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Why are the cations smaller than atom?

Why is the size F^(-) smaller tha that of O^(2-) ion?

Explain why Mn^(2+) is more stable than Mn^(3+) ?

Why is the E^(0) value for the Mn^(3+)|Mn^(2+) couple much more positive than that for Cr^(3+)|Cr^(2+) or Fe^(3+)|Fe^(2+) ? Explain.

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CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -EXERCISE (VERY SHORT ANSWER-TYPE QUESTIONS)
  1. Why is the value of E(Cu^(2+)|Cu)^(0)(+0.34V) positive ?

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  2. Standard reduction potential (E^(0)) of Mn^(3+)|Mn^(2+) system is high...

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  3. Why does Mn^(2+) exhibit the highest paramagnetism among the bivalent ...

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  4. What do you obtain if MnO(2) is fused with solid KOH in air ?

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  5. What is the higher oxidation state exhibited by actinoids ?

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  6. Why are Eu^(2+) and Yb^(2+) highly stable ?

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  7. How many unpaired electrons are there in Gd(Z = 64) atom ?

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  8. What is the structure of manganate ion ?

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  9. What is the common oxidation state of the lanthanoids ?

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  10. Why do transition metals have high atomisation energy ?

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  11. Why do transition elements exhibit variable oxidation states ?

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  12. In volumetric analysis, why is K(2)Cr(2)O(7) used to prepare the stand...

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  13. Why is KMnO(4) stored in dark coloured bottles ?

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  14. Why does explosion occur if conc. H(2)SO(4) is added to KMnO(4) ?

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  15. Why is Fe^(2+) ion smaller than Mn^(2+) ion ?

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  16. Why do transition elements form coloured compounds ?

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  17. Complete the reaction : TiCl(4)+H(2)O to

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  18. Why does zinc have the lowest atomisation energy (126 kJ.mol^(-1)) amo...

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  19. Which among the following exhibit the highest number of oxidation stat...

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  20. Write the reaction between silver bromide and hypo in the development ...

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