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← ScienceWhich outcome occurs when a catalytic converter's substrate is coated unevenly?
A)Increased byproduct gas emissions✓
B)Enhanced surface area exposure
C)Improved NOₓ conversion efficiency
D)Lower catalyst precious metal usage
💡 Explanation
Increased byproduct gas emissions occur because of a reduction in active surface area due to uneven distribution, impacting catalytic activity. This is known as catalyst poisoning, therefore the answer is higher emissions rather than enhanced conversion, because it fails in its core purpose.
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