In which of the following processes does shap | vedclass

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(D) Shape-selective catalysis is a type of catalysis that depends on the pore structure of the catalyst and the size of the reactant and product molec

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$(a)$ and $(c)$ both

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(D) Shape-selective catalysis is a type of catalysis that depends on the pore structure of the catalyst and the size of the reactant and product molecules. Zeolites are the most common shape-selective catalysts. They are aluminosilicates with a general formula $M_{x/n}[(AlO_2)_x \cdot (SiO_2)_y] \cdot mH_2O$. Zeolites are widely used in the petrochemical industry for the conversion of alcohols to gasoline (using $ZSM$-$5$) and in the polymerisation of ethylene. Therefore,both $(a)$ and $(c)$ involve shape-selective catalysis.

List-$I$ (Process)	List-$II$ (Catalyst)
$a$. Deacon's process	$i$. $ZSM-5$
$b$. Contact process	$ii$. $CuCl_2$
$c$. Cracking of hydrocarbons	$iii$. $Ni$
$d$. Hydrogenation of vegetable oils	$iv$. $V_2O_5$

In which of the following processes does shape-selective catalysis occur?

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