Which outcome occurs when a combustion catalyst degrades nearing stoichiometric condition?

💡 Explanation

Increased unburnt hydrocarbons emerge, because a degraded catalyst loses surface area causing reduced adsorption. This lowers the effective collision rate, depressing CO oxidation and HC reactions; therefore hydrocarbons increase, rather than undergoing complete catalysis at target temperatures.

• Which consequence results when gravitational collapse intensifies toward singularity?
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• Which failure appears when stainless steel alloy welds solidify?
• Which effect on observed motion results because Earth exists within curved spacetime?
• Which risk increases when a high-voltage transformer experiences prolonged over-excitation?