Transition metal and their compounds are used as catalysts in industry and in biological system. For example, in the Contact Process, vanadium compounds in the + 5 state (V_2O_5 or VO_3^(-)) are used to oxidise SO_(2) " to "SO_3 : SO_(2) + 1/2O_2 overset(v_2o_5) rarr SO_(3) It is thought that 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) rarr 2V^(4+) + SO_(3) In the second step V^(5+_ is regenerated from V^(4+) by oxygen : 2V^(4+) + 1/2 O_(2) rarr 2V^(5+) +O^(2-) The overall process is, of course, the sum of these two step : SO_(2) + 1/2 O_(2) rarr SO_(3)Which of the following ion involved in the above process will show paramagnetism?

Transition metal and their compounds are used as catalysts in industry

1.	Transition metal and their compounds are used as catalysts in industry and in biological system. For example, in the Contact Process, vanadium compounds in the + 5 state (V_2O_5 or VO_3^(-)) are used to oxidise SO_(2) " to "SO_3 : SO_(2) + 1/2O_2 overset(v_2o_5) rarr SO_(3) It is thought that 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) rarr 2V^(4+) + SO_(3) In the second step V^(5+_ is regenerated from V^(4+) by oxygen : 2V^(4+) + 1/2 O_(2) rarr 2V^(5+) +O^(2-) The overall process is, of course, the sum of these two step : SO_(2) + 1/2 O_(2) rarr SO_(3)Which of the following ion involved in the above process will show paramagnetism?
Answer» `V^(5+)` `V^(4+)` `O^(2-)` `VO_(3)^(-)` SOLUTION :`V^(4+) HARR [AR] 3d^-`