chemistry 1.2

Flashcard 11
Q: What primary pollutants lead to photochemical smog?
A: Nitrogen oxides (NOₓ) and volatile organic compounds (VOCs).

Flashcard 12
Q: Define smog.
A: A type of air pollution formed from smoke, fog, and chemical reactions in the atmosphere.

Flashcard 13
Q: What is the chemical reaction that produces ozone in photochemical smog?
A: NO₂ + sunlight → NO + O; then O + O₂ → O₃.

Flashcard 14
Q: Identify a secondary pollutant in photochemical smog.
A: Ozone (O₃).

Flashcard 15
Q: How does photochemical smog affect the environment?
A: Damages plants, reduces visibility, and contributes to respiratory issues.

Flashcard 16
Q: What role do VOCs play in smog formation?
A: They react with NOₓ in sunlight to form ozone and other secondary pollutants.

Flashcard 17
Q: How can vehicle emissions be reduced to prevent smog?
A: Catalytic converters, cleaner fuels, and reduced car use.

Flashcard 18
Q: What is the difference between photochemical and classical smog?
A: Classical smog (London smog) is caused by sulfur compounds and smoke, while photochemical smog is caused by NOₓ and VOCs in sunlight.

Flashcard 19
Q: Why is smog worse in sunny, warm climates?
A: Sunlight drives the photochemical reactions that produce ozone.

Flashcard 20
Q: Name an indicator of photochemical smog presence.
A: High levels of ground-level ozone and NO₂ in urban air