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Describe how potassium permanganate is p...

Describe how potassium permanganate is prepared from pyrolusite. Write the chemical equations for the reactions involved.

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ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(SHORT ANSWER QUESTIONS)
  1. What are different oxidation states exhibit by lanthanoids?

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  2. Explain the following terms : (a) Chemistry of all Lanthanoids is so...

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  3. What is the electronic difference between lanthanoids and actinoids? W...

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  4. Name the elements with atomic number 58 and 59 and write their electro...

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  5. What are inner-transition elements? Write their general electronic con...

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  6. Define lanthanoids. Give three differences between lanthanoids and act...

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  7. What happens when : (i) Acidified K2Cr2O7 reacts with Kl. (ii) K2...

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  8. The sums of first and second ionisation energies and those of third an...

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  9. Of the ions Ag^(+),Co^(2+) and Ti^(4+) ,which ones will be coloured in...

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  10. Among ionic species, Sc^(3+), Ce^(4+) and Eu^(2+), which one is a goo...

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  11. of the ions Co^(2+), Sc^(3+) and Cr^(3+) which one will give coloured ...

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  12. A transition element forms alloys with other transition metals easily....

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  13. (i) Give the formula which expresses the general electronic configurat...

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  14. [Ti(H2O)6]^(3+) is coloured while [Sc(H2O)6]^(3+) is colourless . Expl...

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  15. Represent the reaction of acidified K2Cr2O7 with: (i) KI solution (...

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  16. Assertion : KMNO4 acts as an oxidising agent in acidic, basic or neutr...

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  17. How is that in alkaline solution we have chromate and in acidic soluti...

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  18. Decribe, how potassium dichromate is prepared from chromite. Write the...

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  19. Describe how potassium permanganate is prepared from pyrolusite. Write...

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  20. What is lanthanoid contraction? What are the consequences of lanthanoi...

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