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← ScienceWhich outcome occurs when molecular kinetic energy decreases disproportionately at a metallic catalyst surface?
A)Reduced catalyst surface area available
B)Increased undesired side-product formation
C)Faster reaction kinetics overall rate
D)Selective adsorption site poisoning occurs✓
💡 Explanation
Selective site poisoning occurs because lower kinetic energy means reactant molecules preferentially adhere to specific, more favorable active sites at first. Therefore, these sites become saturated, lowering reaction efficiency rather than increasing it, due to blocked access for others.
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