Photochemical Smog

Question 0

Requires?

Answer 0

Sunlight

Question 1

Caused by?

Answer 1

Car, bus, truck exhausts

Question 2

Takes place?

Answer 2

Troposphere

Question 3

Conditions?

Answer 3

No wind
Sunny day
Thermal inversion (warm top - cool below)
Lots of vehicles

Question 4

What is in smog?

Answer 4

NOx, ozone, organic compounds

Question 5

What are Primary pollutants?

Answer 5

Released directly into atmosphere

Nitric oxides, carbon monoxides

Question 6

What are secondary pollutants?

Answer 6

Formed by primary pollutants reacted with sun, water, air

Question 7

Ozone forms?

Answer 7

Photochemical reaction of NO2

Reactive O atom reacts with O3

Question 8

What causes the build up of smog?

Answer 8

Secondary pollutants

Question 9

Harmful effects of ozone?

Answer 9

Respiratory problems
Damages plants
Deteriorates rubber and plastics

Question 10

Role of catalytic converters?

Answer 10

To catalyse the reaction of NO and CO to CO2 and N2

Question 11

Structure?

Answer 11

Honeycomb Coated in metal to increase surface area

Question 12

2CO + O2 = 2 CO2

Answer 12

Removal of carbon monoxide

Question 13

Removal of nitric oxide

Answer 13

2H2 + 2NO = 2H2O + N2