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Which mechanism hinders complete conversion in catalytic cracking?

A)Equilibrium shifts to reactants
B)Catalyst active site degradation
C)Product adsorption onto catalyst
D)Insufficient reactant partial pressure

💡 Explanation

Catalyst active site degradation hampers cracking when coke or contaminants block sites, because it reduces catalytic activity, therefore overall conversion declines rather than a shift in equilibrium which primarily affects reversible reactions.

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