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← ScienceWhich 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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