Reducing emissions-nitrogen ox

whatis a weak acidthatresults from nitrogen oxide emissions ?


At room temperature, nitrogen monoxide reacts withatmospheric oxygen to give nitrogen dioxide.
2NO + O2 → 2NO2

Nitrogen dioxide reacts with water to give nitric acid (HNO3) andnitrous acid(HNO2).
2NO2 + H2O → HNO3 + HNO2

Nitric acid is a strong acid, while nitrous acid is a weak acid.

Hence, the answer is 3. nitrous acid.