Question

Why does vanadium pentoxide act as catalyse ?
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Answer 1

Answer:

V2O5 can act as catalyst as vanadium (V) is a transition metal and it has availability of vacant d-orbitals. Due to which vanadium can show variable oxidation states. ... V2O5 help in the oxidation of SO2 to SO3. V2O5 will absorb the SO2 on its surface and form V2O4 and O2 .

Answer 2

Answer:

This is a good example of the ability of transition metals and their compounds to act as catalysts because of their ability to change their oxidation state (oxidation number). ... The vanadium(IV) oxide is then re-oxidized by the oxygen.

Transition metal has availability of vacant d- orbital Due to which transition metal show variable oxidation state. Vanadium is transition metal and it easily changes from one oxidation state to another. It can form unstable intermediates in one oxidation state and then readily changes into products by acquiring another stable oxidation state and thus providing new path to reaction.

hope it will help u ...