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Give the preparation of potassium perman...

Give the preparation of potassium permanganate from pyrolusite ore.

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(a) Account for the following : (i) Mn_(2)O_(7) is acidic whereas MnO is basic. (ii) Though copper has completely filled d-orbital (d^(10)) yet it is considered as a transition metal. (iii) Actinoids show wide range of oxidation states. (b) Write the preparation of potassium permanganate from pyrolusite ore (MnO_(2)) .

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(a) Describe the preparation of potassium dichromate from chromite ore: (b) How does the acidified solution of potassium permanganate react with (i) oxalic acid (ii) iron (II) ions.

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MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-REVISION EXERCISES ( SHORT ANSWER QUESTION)
  1. (a) Why do the transition elements exhibit higher enthalpies of atomiz...

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  2. (a) Why do Zr and Hf have similar properties? (b) What happens when K2...

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  3. Give the preparation of potassium permanganate from pyrolusite ore.

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  4. (a) What happens when K2Cr2O7 is heated strongly? (b) Transition eleme...

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  5. (a) Describe the preparation of potassium dichromate from chromite ore...

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  6. (a) What is lanthanoid contraction? What is the cause of lanthanoid co...

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  7. (a) Write the electronic configuration of: (i) Co^(2+) (27) (ii) C...

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  8. (a) What is the cause of lanthanoid contraction? Discuss. (b) What is ...

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  9. When chromite ore FeCr(2)O(4) is fuse with NaOH in presence of air, a ...

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  10. Complete the following chemical equations : (i) 8MnO(4)^(-)+3S(2)O(3...

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  11. Give reason for the following : (i) Mn shows the highest oxidation s...

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  12. (a) Write the structure of Cr2O7^(2-) Give two uses of K2Cr2O7 . ...

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  13. (a) Explain the magnetic behaviour of transition metals. (b) Write...

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  14. Explain :(i) Variable oxidation states of d-block elements (ii) d-bloc...

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  15. (a) Define transition elements. (b) Give general electronic configurat...

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  16. Give reason. (a) Cerium (Ce) exhibits +4 oxidation state.(b) Actinoid ...

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  17. Write any three applications of d and f-block elements.

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  18. (i) Which of the following are coloured in aqueous solution ? Give rea...

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  19. (i) Explain why most of the Cu(I) compounds are unstable in aqueous so...

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  20. (i) What is the most common oxidation state of the actinoids? (ii) Why...

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