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Why are Mn^(2+) compounds more stable th...

Why are `Mn^(2+)` compounds more stable than `Fe^(2+)` towards oxidation to their +3 state?

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`Mn^(2+)=3d^5`, which is half-filled and hence stable.Therefore, `IE_3` is very high, i.e., 3rd electron cannot be lost easily. `Fe^(2+)=3d^6`, hence, it can lose one electron easily to give the stable configuration `3d^5`.
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CENGAGE CHEMISTRY ENGLISH-APPENDIX INORGANIC VOLUME 2-Exercises
  1. List the uses of neon and argon gases.

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

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

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

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

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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 lanthano...

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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 different oxidation states exhibit by lanthanoids?

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  12. Explain giving reasons: (i) Transition metals and many of their compou...

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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. Descibe the oxidising actions of potassium dichromate and write the io...

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

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  18. For (M^(2+))/(M) and (M^(3+))/(M^(2+)) systems the E^(ɵ) values for so...

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

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

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