Place the missing words to complete the following statement about catalytic converters reduction and oxidation operation using the following words. Missing Words: Converter, Exhaust, Gases, Molecules, Phase, Reduction, Second, Temperature, Water During reduction, as NOX Select... pass over the catalyst, the N atoms are pulled from the NOX Select... and combined with other N atoms to form N2, which passes through the Select... . The released O2 atoms react with the CO in the Select... stream and form CO2 or pass through to the second bed. The result of NOX Select... is pure N2 plus O2 or CO2. During the oxidation Select... inside the converter, HC and CO molecules experience a Select... combustion. This occurs because of the presence of O2 and the Select... of the converter. The result of this combustion or oxidation process is Select... vapour (H2O) and CO2