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The catalytic activity of transition met...

The catalytic activity of transition metals and their compounds is mainly due to: a)their magnetic behaviour b)their unfilled d-orbitals c)their ability to adopt variable oxidation state d)their chemical reactivity

A

Their manetic behaviour

B

Their unfilled d-orbitals

C

their ability to adopt variable oxidation state

D

their chemical reactivity

Text Solution

Verified by Experts

The correct Answer is:
C
Because of the variable oxidation states they may form intermediate compound with one of the reactants. These intermediate provides a new path with lower activation energy.
` V_2O_5 +SO_2 to V_2 O_4 + SO_3 , 2V_2O_4 to 2 V_2 O_5`
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BRILLIANT PUBLICATION-THE D-AND F-BLOCK ELEMENTS-QUESTIONS (LEVEL-III)
  1. The catalytic activity of transition metals and their compounds is mai...

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  2. A metal M which is not affected by strong acids like conc. HNO3 conc. ...

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  3. The acidic, basic or amphoteric nature of Mn2 O7 ,V2O5, and CrO are re...

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  4. An inorganic compound on strong heating gave a blackish brown powder a...

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  5. MnO(2) overset(I)(to)MnO(4)^(2-)overset(II)(to)MnO(4)^(-) I and II are

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  6. Identify the product and its colour when MnO2 is fused with solid KOH ...

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  7. When manganous salt is fused with a mixture of KNO3 and solid NaOH, th...

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  8. Consider following statements, I. The size of the lanthanide M^(3+) io...

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  9. Most transition metals I:forms sets of compounds which display differe...

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  10. [Fe(H2 O)5 NO]^(2+) is brown-ring complex. In this complex

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  11. When K2 CrO4 is added to CuSO4 solution, there is formation of CuCrO4...

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  12. Select the correct statements(s)

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  13. Which of the following statements are true?

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  14. Although +3 is the characteristic oxidation state for lanthanoids, cer...

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  15. Select correct statements.

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  16. When CO2 is passed into aqueous

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  17. Select correct statements (s)

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  18. Which of the following statements are correct

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  19. Amongst the following, identify the species with an atom in +6 oxidati...

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  20. Which metals are present in german silver?

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  21. The complex forming tendency of a transition metal depends upon:

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