Transition metal and their compounds are used as catalyst in industry and in biological system. For example, in the Contact Process, vanadium compounds in the +5 state (V_(2)O_(5) or VO_(3)^(-)) are used to oxidise SO_(2) to SO_(3): SO_(2)+(1)/(2)O_(2) overset(V_(2)O_(5))(to) SO_(3) It is thought thta the actual oxidation process takes place in two stages. In the first step, V^(5+) in the presence of oxide ions converts SO_(2) to SO_(3). At the same time, V^(5+) is reduced to V^(4+). 2V^(5+)+O^(2-)+SO_(2) to 2V^(4+)+SO_(3) In the second step, V^(5+) is regenerated from V^(4+) by oxygen: 2V^(4+)+(1)/(2)O_(2) to 2V^(5+)+O^(2-) The overall process is, of curse, the sum of these two steps: SO_(2) +(1)/(2)O_(2) to SO_(3) Q. Catalytic activity in transition metals depends on:

Transition metal and their compounds are used as catalyst in industry

1.	Transition metal and their compounds are used as catalyst in industry and in biological system. For example, in the Contact Process, vanadium compounds in the +5 state (V_(2)O_(5) or VO_(3)^(-)) are used to oxidise SO_(2) to SO_(3): SO_(2)+(1)/(2)O_(2) overset(V_(2)O_(5))(to) SO_(3) It is thought thta the actual oxidation process takes place in two stages. In the first step, V^(5+) in the presence of oxide ions converts SO_(2) to SO_(3). At the same time, V^(5+) is reduced to V^(4+). 2V^(5+)+O^(2-)+SO_(2) to 2V^(4+)+SO_(3) In the second step, V^(5+) is regenerated from V^(4+) by oxygen: 2V^(4+)+(1)/(2)O_(2) to 2V^(5+)+O^(2-) The overall process is, of curse, the sum of these two steps: SO_(2) +(1)/(2)O_(2) to SO_(3) Q. Catalytic activity in transition metals depends on:
Answer» Their ABILITY to exist in different OXIDATION states The size of the metal atoms The number of EMPTY ATOMIC orbitals available None of these Answer :A