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Why does vanadium pentoxide acts as a ca...

Why does vanadium pentoxide acts as a catalyst?

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It exhibits multiple oxidation states and forms unstable intermediates with the reactants which readily change in to products.
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ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. Write the highest oxidation state shown by an element with atomic numb...

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  2. Why are compounds of transition elements generally coloured ?

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  3. Why does vanadium pentoxide acts as a catalyst?

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  4. What is the common oxidation state of Cu, Ag and Au?

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  5. Name the metal with tripositive ion represented by the configuration :...

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  6. Out of Cr^(2+) and Cr^(3+), which one is stable in aqueous solution?

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  7. What is meant by 'disproportionation'? Give an example of disproporti...

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  8. Which elements are called ferrous metals ?

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  9. What are platinum metals ?

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  10. What is the highest oxidation state shown by a transition element.

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  11. Name one ore each of manganese and chromium.

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  12. What do you mean by 18 carat gold ?

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  13. Out of Al, Zn, Mg and Fe which is the densest element?

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  14. Which is more stable Fe^(2+) or Fe^(3+)? Why ?

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  15. Why is Pt(IV) more stable than Ni(IV).

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  16. K2 Pt Cl6 is well known compound while corresponding Ni compound is n...

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  17. Why is electronic configuration 1s^2 2s^2 2p^6 3s^2 3p^6 3d^4 4s^2 n...

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  18. How does the ionic/covalent character of the compounds of a transition...

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  19. Why do transition elements have high value of hydration enthalpy?

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  20. Why Fe^(2+) has smaller radius than Mn^(2+) ?

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