Question

why do transition metals show catalytic behaviour?

Answer 1

1. Transition metals show catalytic behavior mainly due to the following reasons: The presence of vacant d orbitals. They have the ability to exhibit variable valencies. They have a tendency to form complex compounds.
2. Transition metals and their compounds function as catalysts either because of their ability to change oxidation state or, in the case of the metals, to adsorb other substances on to their surface and activate them in the process. All this is explored in the main catalysis section.
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Answer 2

Because they have the tendency to form complex compounds. They also have vacant orbitals.
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