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-$I$	List-$II$
$A$. $4NH_{3(g)} + 5O_{2(g)} \rightarrow 4NO_{(g)} + 6H_2O_{(g)}$	$I$. $NO_{(g)}$
$B$. $N_{2(g)} + 3H_{2(g)} \rightarrow 2NH_{3(g)}$	$II$. $H_2SO_{4(l)}$
$C$. $C_{12}H_{22}O_{11(aq)} + H_2O_{(l)} \rightarrow C_6H_{12}O_6 + C_6H_{12}O_6$	$III$. $Pt_{(s)}$
$D$. $2SO_{2(g)} + O_{2(g)} \rightarrow 2SO_{3(g)}$	$IV$. $Fe_{(s)}$

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

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