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Why does V(2)O(5) act as a catalyst ?...

Why does `V_(2)O_(5)` act as a catalyst ?

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`V_(2)O_(5)` is a good catalyst because : 1. `V_(2)O_(5)` provides greater surface area, 2. `V_(2)O_(5)` initially forms an intermediate by its reaction with the reactant. In the next step, the intermediate decomposes to form the product and `V_(2)O_(5)` is regenerated. The presence of vacant d - orbitals and unpaired d - electrons in the V - atom is responsible for its variable valency.
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CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -HIGHER ORDER THINKING SKILL (HOTS) QUESTIONS
  1. Can lanthanum (Z = 57) exhibit + 4 oxidation state ?

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  2. Ce^(3+) can easily get oxidised to Ce^(4+). Give reason.

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  3. Why does V(2)O(5) act as a catalyst ?

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  4. If CO(2) is passed through a green aqueous solution of potassium manga...

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  5. Cu(2)S is black and Cu(2)O is red through Cu^(+) has no unpaired elect...

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  6. Why does copper dissolve in ammonia solution ?

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  7. Mercurous ion exists as Hg(2)^(2+). Explain.

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  8. Cu^(+) salts are colourless but Cu^(2+) salts are coloured. Give reaso...

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  9. Which of the following can be considered to be a transition element - ...

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  10. Ti^(3+), V^(3+), Mn^(2+), Fe^(3+), Co^(2+) form coloured aqueous solut...

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  11. Why do gadolinium (Gd, Z = 64) and lutetium (Lu, Z = 91) have very hig...

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  12. Which element has the lowest atomisation energy in 3d - series ? Expla...

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  13. Stability of Fe^(3+) ion is greater than Mn^(3+) ion but less than Cr^...

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  14. Fe has a much lower tendency to get oxidised than Mn and Cr - explain....

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  15. Scandium is considered to be a transition element though it does not f...

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  16. Why do the transition elements of the 5d - series have much higher ion...

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  17. Fluorine is more electronegative than oxygen. Yet the highest oxidatio...

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  18. It is difficult to find lanthanides in their purest form. Explain.

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  19. The transition metal ions form complexes with water, but does not reac...

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  20. The standard reduction potential of four elements A, B, C & D are - 0....

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