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← ScienceWhich consequence results when excessive heat energy causes catalyst poisoning?
A)Decreased reaction rate✓
B)Increased product selectivity
C)Enhanced catalyst surface area
D)Improved catalyst dispersion
💡 Explanation
High temperatures cause catalyst poisoning via sintering--decreasing surface area and active sites--because the activation energy for sintering is exceeded; therefore the reaction rate decreases, rather than altering selectivity or improving catalyst properties.
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