Question

the reduction catalyst in a catalytic converter helps to:
○ a. reduce the oxides of nitrogen molecules into their base compounds.
○ b. oxidize any unburned hydrocarbons and carbon monoxide.
○ c. convert exhaust water to oxygen and hydrogen.
○ d. oxidize nitrogen before releasing it into the atmosphere.

Explanation:

The reduction catalyst in a catalytic converter is designed to reduce nitrogen - oxides (NOx) into nitrogen and oxygen, which are their base compounds. Oxidation of unburned hydrocarbons and carbon monoxide is done by the oxidation catalyst. Exhaust water is not converted to oxygen and hydrogen in a catalytic converter, and nitrogen is not oxidized before release in the context of catalytic converter function.

Answer:

A. Reduce the oxides of nitrogen molecules into their base compounds.