Assertion: Transition metals and their comple | vedclass

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(A) The transition metals and their compounds are known for their catalytic activity.This activity is ascribed to their ability to adopt multiple oxid

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Assertion is true. Reason is true and Reason is the correct explanation for Assertion

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(A) The transition metals and their compounds are known for their catalytic activity.This activity is ascribed to their ability to adopt multiple oxidation states and to form complexes.Catalysts at a solid surface involve the formation of bonds between reactant molecules and atoms of the surface of the catalyst (first row transition metals utilise $3d$ and $4s$ electrons for bonding).This has the effect of increasing the concentration of the reactants at the catalyst surface and also weakening of the bonds in the reacting molecules,which results in the lowering of the activation energy.Thus,the reason correctly explains why transition metals show catalytic activity.

Assertion: Transition metals and their complexes show catalytic activity.
Reason: The activation energy of a reaction is lowered by the catalyst.

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Assertion: Transition metals and their complexes show catalytic activity.Reason: The activation energy of a reaction is lowered by the catalyst.