The catalytic activity of transition metals a | vedclass

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(D) Transition metals exhibit catalytic activity primarily because they can adopt multiple oxidation states and form complexes. They form unstable int

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Ability to adopt multiple oxidation states and their complexing ability

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(D) Transition metals exhibit catalytic activity primarily because they can adopt multiple oxidation states and form complexes. They form unstable intermediate compounds with reactants,which provide an alternative reaction path with lower activation energy. This reduction in activation energy increases the reaction rate. Finally,these intermediates decompose to yield the product,and the catalyst is regenerated.

Aspects	Metal
$a$. The metal which reveals a maximum number of oxidation states	$i$. Scandium
$b$. The metal although placed in $3d$ block is considered not as a transition element	$ii$. Copper
$c$. The metal which does not exhibit variable oxidation states	$iii$. Manganese
$d$. The metal which in $+1$ oxidation state in aqueous solution undergoes disproportionation	$iv$. Zinc

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

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