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.

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

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