This ppt introduces the sources and effects of oxide of nitrogen.

1. Oxide of Nitrogen
SOURCES & EFFECT

2. How are nitrogen oxides formed?
Under normal conditions O2 and N2 do not react
which each other.
In extreme condition (very high temperature),
nitrogen oxides will form.
If we burn gasoline in a car engine the combustion
temperature is about 2000°C.
This is enough to oxidise nitrogen in the fuel air
mixture.

3. How are nitrogen oxides formed?
Combustion of nitrogen and oxygen
in the car engine, at high
temperature.
(Man-made source)
Forest fires
(Man-made/natural source)
Nitrogen oxides are naturally formed
in flashes during thunderstorms.
(Natural source)

4. Effect of NOx
In the morning hours of a warm clear day people go to work using their cars. There is strong traffic
and NO molecules are formed. These are oxidised and converted into NO2 slowly spreading from the
city centres and highways. The beams of the raising sun split NO2 into NO and cause ozone (O3)
formation.

5. Effect of Nox on environment
 Nitrogen oxides will react with
oxygen and water in the air and fall as
acid rain.
 Acid rain
- Corrode metal structure (bridges)
- Destroy building in particular chalk
stones and marble. (think Taj Mahal)
- Acid rain is harmful to forests as
chemicals in the soil damage the trees
- kill aquatic life because toxic. And it Check out the lake’s pH level!
makes the lakes acidic. The animals
living in them can die.

6. Effect of Nox on human
Nitrogen oxides are toxic in high concentrations.
(it is very unhealthy to inhale emissions standing
directly in the exhaust gas plume of a car!)

7. Solution?
What do you think are the
steps to control the volume
of control Nox in the
atmosphere?