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Transition elements act as catalysts. Wh...

Transition elements act as catalysts. Why?

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This is, dtue to the presence of unpaired electroins in their incomplete d subshells and hence pössess the ability to absorb and reenit wide range of energies. This makes the required energy of activation available.
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V PUBLICATION-THE d- AND f- BLOCK ELEMENTS-QUESTION BANK
  1. Name the catnlyst used in (i) the manufacture of sulphuric acid by con...

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  2. Name the catalyst used in i) the oxidation of ammonia to nitric acid b...

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  3. Transition elements act as catalysts. Why?

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  4. Why the transition metal compounds are coloured?

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  5. Give the spin only formula fór calculating the magnetic moment of a tr...

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  6. Name the ores of Titanium?

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  7. . Name the metal, with highest melting point?

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  8. Name the common ores of i) Chromiüm ii) Molybdenum iii) Tungsten

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  9. How is potassium permanganate prepared in the laboratory?

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  10. What is the reaction between KMnO(4) and sodium thiosulphate?

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  11. Potassium permanganate KMnO(4) is not a primary standard Why?

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  12. Actinoids show, a large number of oxidation states Why?

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  13. Write the reason for the statement given below: Transition elements sh...

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  14. Which of the following would be coloured? Ti^(3+),Mn^(2+),Sc^(3+),Fe^...

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  15. Why do transition elements have many irregularities in their electroni...

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  16. Which one is paramagnetic is Sc^(3+) or Cr^(4+). Why?

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  17. Which is more basic LaOH(3) or LuOH(3) . Why?

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  18. Why Sm^(2+), Eu^(2+) and Yb^(2+) in solutions 'are good reducing agen...

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  19. Why is the third ionisation energy of manganese (At No. 25) unexpected...

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  20. Write all possible oxidation states of an element having atomic number...

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