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The catalytic activity of transition metals and their compounds is mainly due to

Answer»

their magnetic behaviour
their unfilled dorbitals
their ability to adopt variable oxidation state
their chemical reactivity

Solution :The transition metals and their COMPOUNDS are used ascatalysts. Because of the variable oxidation states theymay form INTERMEDIATE compound with one of thereadtants. These intermediate provides a new path withlowe activation ENERGY. `V_(2)O_(5)+SO_(2) to V_(2)O_(4)+SO_(3)`
`2V_(2)O_(4)+O_(2) to 2V_(2)O_(5)`


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