Nitrogen Oxides

Question 1

Nitrogen oxides (NOx(g)) are major air pollutants that form what?

Answer 1

Both smog and acid rain.

Question 2

Nitrogen oxides affect what?

Answer 2

They affect the respiratory system and eyes.

Question 3

Nitrogen oxides (NOx(g)) form mainly from what and also form by what?

Answer 3

Combustion in vehicles. By combustion in generating plants and some industrial processes, such as oil refining.

Question 4

How is NOx formed?

Answer 4

Nitrogen formed by burning fuels first combines with oxygen to form nitrogen monoxide gas (NO(g)). This then combines with oxygen in the atmosphere to form nitrogen dioxide (NO2(g)), a brownish gas.

Question 5

Both sulfur dioxide and nitrogen oxides are what, especially in where, the main concern in cities is with pollution from what?

Answer 5

Carefully monitored. Especially in cities and areas where industrial processes may release these pollutants. In cities, the main concern is with pollution from vehicles.