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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)) .

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

(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.

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

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PRADEEP-D- AND F-BLOCK ELEMENTS-ADDITIONAL QUESTIONS (SHORT ANSWER QUESTIONS )
  1. Name the gas evolved when concentrated HCI is added to powdered potass...

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  2. Write an equation in ionic form to represent the oxidizing actionof Cr...

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

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

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  5. What happens when (i) KMnO(4) is heated (ii) K(2)Cr(2)O(7)is heated.

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  6. What happens when acidified KMnO(4)reacts with (i) H(2)S (ii)Oxalic ac...

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  7. Describe the oxidising property of KMnO(4) in neutral or faintly alkal...

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  8. What chemical changes take place when (i) MnO(2) is fused with KOH in ...

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  9. Write ionic equations for the conversion of (a)manganate to permanga...

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  10. Write chemical equations for the following reactions: (a) Oxidatio...

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

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  12. What is meant by disproporitonation of an oxidation state? Give an exa...

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  13. What happens when (i) (NH(4))(2) Cr(2) O(7) is heated ? (ii) H(3)PO...

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  14. Complete the following equations : (i) 2MnO(4)^(-) + 16 H^(+) + 5S^...

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  15. What are inner-transition elements? Decide which of the following atom...

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  16. What is lanthanoid contraction? What is its cause and what ar its cons...

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  17. Misch metal is

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  18. How would you account for the following : (i) Many of the transition...

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  19. (a) How would you account for the following : (i) Actinoids contract...

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  20. Give reasons for the following: (i) Transition metals form alloys....

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