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Which divalent metal ion has maximum par...

Which divalent metal ion has maximum paramagnetic character among the first transition metals? Why?

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Explain: (a). Why is K-2Cr_2O_7 generally preferred to Na_2Cr_2O_7 in volumetric analysis? (b). Which divalent metal ion has maximum paramagnetic character amont the first transition metals? Why? (c). How the colour of K_2Cr_2O_7 solution does depend on pH of the solution?

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PRADEEP-D- AND F-BLOCK ELEMENTS-IMPORTANT QUESTIONS
  1. Which is a stronger reducing agent Cr^(2+) or Fe^(2+) and why ?

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

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  3. How will you account for the following : (i) Cobalt (II) is stable i...

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  4. Which of the two is paramagnetic : V (IV) or V (V) and why ?

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  5. Copper (I) compounds are white and diamagnetic while copper(II) compou...

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  6. Which divalent metal ion has maximum paramagnetic character among the ...

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  7. Transition elements have greater tendency to form complexes because

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  8. In the titratin of Fe^(2+) ions with KMnO(4) in acidic medium, why dil...

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  9. What is meant by 'disproportionation'? Give two examples of disproport...

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

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

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

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  13. When a white crystalline compound X is heated with K(2)Cr(2)O(7) and c...

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  14. The +3 oxidation states of langthanum ( Z= 57), gadolinium (Z= 64) and...

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  15. Why Sm^(2+), Eu^(2+) and Yb^(2+) ions in solutions are good reducing a...

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

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  17. What are aloloyys ? Name an important alloy which contains some of th...

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  18. Actinoid contraction is greater from element to element than lanthanoi...

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  19. Comparethe chemistry of actinoids with that of lanthanoids with specia...

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  20. Name the elements of 3d series. Give their electronic configuration. E...

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