What is the role of a catalyst in a chemical | vedclass

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(D) catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. $1.$ It provides a

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Helps in achieving equilibrium in less time and lowers the activation energy

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(D) catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. $1.$ It provides an alternative pathway for the reaction with lower activation energy $(E_a)$. $2.$ By lowering the activation energy,it allows more reactant molecules to cross the energy barrier,thereby increasing the reaction rate. $3.$ Consequently,the system reaches the state of chemical equilibrium in a shorter amount of time. Therefore,both statements regarding time and activation energy are correct.

List-$I$ (Reaction)	List-$II$ (Catalyst)
$A$. Hydrogenation of vegetable oils	$I$. $Ni$
$B$. Decomposition of potassium chlorate	$II$. $MnO_2$
$C$. Oxidation of $SO_2$ in lead chamber process	$III$. $Pt$
$D$. Oxidation of ammonia in Ostwald's process	$IV$. $NO_{(g)}$

What is the role of a catalyst in a chemical reaction?

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