Why are catalysts called shape-selective cata | vedclass

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(C) Catalysts are called shape-selective catalysts because their catalytic reaction depends upon the pore structure of the catalyst and the size of th

Vedclass · Accepted Answer

The pore size of the catalyst traps specific molecules.

Vedclass · Answer

(C) Catalysts are called shape-selective catalysts because their catalytic reaction depends upon the pore structure of the catalyst and the size of the reactant and product molecules. $Zeolites$ are the most common examples of shape-selective catalysts. Their honeycomb-like structure allows only molecules of a certain size to enter the pores and react,making them highly selective.

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

Why are catalysts called shape-selective catalysts?

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