Which oxide of nitrogen is released from car engines?(a) Nitrogen dioxide(b) Nitric oxide(c) Nitrous oxide(d) Nitrogen tetroxideI have been asked this question in a national level competition.This interesting question is from P-Block Elements topic in section P-Block Elements of Chemistry – Class 12

Which oxide of nitrogen is released from car engines?(a) Nitrogen diox

1.	Which oxide of nitrogen is released from car engines?(a) Nitrogen dioxide(b) Nitric oxide(c) Nitrous oxide(d) Nitrogen tetroxideI have been asked this question in a national level competition.This interesting question is from P-Block Elements topic in section P-Block Elements of Chemistry – Class 12
Answer» Right option is (b) NITRIC oxide Easy explanation: Car ENGINES release only nitric oxides. Nitrogen and oxygen from the air combine at HIGH temperatures in the engine to produce nitrogen (II) oxide by the reaction N2(g) + O2(g) → 2NO(g). Nitric oxides rise in the atmosphere and are oxidized to nitrogen dioxide, NO2 which DISSOLVES in the precipitating water to form acid RAIN.

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