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Account for the folloiwng: Mn^(2+) is mo...

Account for the folloiwng: `Mn^(2+)` is more stable than `Fe^(2+)` towards oxidaton to +3 state.

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R G PUBLICATION-THE d-AND f-BLOCK ELEMENTS-EXERCISE
  1. How will you prepare: K2MnO4 from MnO2?

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  2. How will you prepare: Na2Cr2O7 from Na2CrO4?

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  3. Account for the folloiwng: Mn^(2+) is more stable than Fe^(2+) towards...

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  4. Account for the folloiwng: The enthalpy of atomization is lowest for Z...

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  5. Account for the folloiwng: Actinoid elements show wide range of oxidat...

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  6. Explain the folloiwng facts: Among lanthanoids Ln(III)compound are pre...

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  7. The E(M^(2+)//M)^(Theta) for copper positive (+0.34V)It is only metal ...

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  8. Explain the folloiwng facts: The metallic radii of the 3rd (5d) series...

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  9. Explain briefly how +2 state becomes more and more stable in the first...

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  10. Write three general chracteristics of transition elements.

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  11. Discuss about the melting point of transition elements.

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  12. "In a given series of the transition elements the atomic size increase...

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  13. Account for the folloiwng: The enthalpy of atomization is lowest for Z...

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  14. What is meant by 'Exchange energy'? How this energy affect the ionisat...

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  15. Compare the stability of +2 oxidation state for the elements of first ...

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  16. Write four factors which affect the relative stability of various oxid...

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  17. Why E^@ values for Mn and Ni are negative?

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

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  19. Why is the highest oxidation state of a metal exhibited in its oxide o...

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  20. Explain the following facts:transition elements form coloured compound...

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