Photochemical Smog Quiz

What is a key requirement for photochemical smog formation?

• Heavy rainfall

• Sunlight

• Low temperatures

• Strong winds

Which of the following is a primary pollutant involved in photochemical smogs?

• Tropospheric ozone

• Peroxyacyl Nitrates (PANS)

• Nitrogen oxides (NOx)

• Carbon monoxide

What are Peroxy Acetyl Nitrates (PANs)

• Primary pollutants released by vehicle exhausts

• Secondary pollutants formed during photochemical smogs

• Natural components of clean air

• Pollutants that only occur indoors

Which city is most likely to experience photochemical smog?

• London (cloudy and rainy)

• Los Angeles (sunny and congested)

• Oslo (low traffic and cold)

• Reykjavik (low population and windy)

How do catalytic converters reduce NOx emissions?

• By adsorbing them onto a filter

• By oxidizing them into CO2 and water

• By chemically reducing them to nitrogen and oxygen

• By condensing them into liquid form

Which of the following is NOT a secondary pollutant associated with photochemical smogs?

• Tropospheric ozone

• Peroxy Acetyl Nitrates (PANs)

• Carbon dioxide (CO2)

• Fine particulate matter (PM2.5)

What makes cities like Los Angeles prone to photochemical smogs?

• High rainfall and vegetation density

• Sunny weather, heavy traffic, and temperature inversions

• Low population density and cool temperatures

• High altitudes and low humidity

Which health issue is NOT caused by photochemical smogs?

• Asthma exacerbation

• Eye irritation

• Skin burns

• Increased risk of heart attacks

How can vapors at petrol stations be managed to reduce hydrocarbon emissions?

• By burning the vapors immediately

• By collecting and recycling them into fuel tanks

• By releasing them into the atmosphere in controlled amounts

• By filtering them with a water-based purifier

What happens to unburnt hydrocarbons in catalytic converters?

• They are adsorbed onto a carbon filter.

• They are oxidized to form carbon dioxide and water.

• They are reduced to nitrogen and oxygen.

• They are condensed and returned to the fuel tank.