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(a) Describe the preparation of potassiu...

(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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Give the preparation of potassium permanganate from pyrolusite ore.

Describe the preparation of potassium dichromate from chromite ore. What is the effect of increasing pH on solution of potassium dichromate ?

Describe the preparation of potassium dichromate from chromite ore. What is the effect of increasing pH of potassium dichromate solution ?

Describe the preparation of potassium dichromate from iron chromite ore.What is the effect of increasing pH on a solution of potassium dichromate?

Hydrogen peroxide when added to a solution of potassium permanganate acidified with sulphuric acid

Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with oxalic acid? Write the ionic equation for the reaction. OR Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with (i) an iodide (ii) H_(2)S .

MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-REVISION EXERCISES ( SHORT ANSWER QUESTION)
  1. Give the preparation of potassium permanganate from pyrolusite ore.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  19. Zn^(2+) salt are white while Cu^(2+) salts are blue. Assign reason.

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  20. Calculate the number of unpaired electrons in Cr^(3+) and V^(3+) io...

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