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Moderate

Pollution and Reaction Rate

APCHEM-S7OV8U

A byproduct of fuel-lean combustion of gasoline is the production of nitrogen monoxide, which in turn is converted to $NO_2$. The $NO_2$ reacts with water in the atmosphere to produce acid rain in the form of both nitric acid and nitrous acid.

For the reaction that reduces nitrogen monoxide emissions, therefore reducing subsequent $NO_2$ production in a standard automotive combustion engine, which of the following will provide the BEST method for reducing the gaseous pollution?

A

Increase the pressure of the system through decreasing the diameter of the exhaust pipe, forcing a lower nitrogen monoxide production.

B

Increase the temperature of the system by changing the location of the exhaust system to begin closer to the engine, allowing for a more fuel-rich combustion and thus reducing the overall nitrogen monoxide production.

C

Increase the amount of a homogeneous catalyst by increasing the diameter of the exhaust pipe, thus resulting in a lower amount of nitrogen monoxide produced.

D

Increase the amount of a heterogeneous catalyst by increasing the path length of the exhaust pipe, thus resulting in a lower amount of nitrogen monoxide produced.