Which shift in equilibrium occurs when catalytic converter temperature drops below its optimal range?

💡 Explanation

When a catalytic converter's temperature drops, equilibrium shifts because reaction kinetics slow down due to decreased thermal energy, reducing the catalyst's efficiency in oxidizing hydrocarbons and CO. Therefore incomplete combustion increases hydrocarbon and CO emissions, rather than improved NOx conversion, increased sulfur dioxide, or enhanced catalyst activity, which require higher temperatures.

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