Smog is
A. Nothing but black smoke
B. A combination of smoke and fog
C. A liquid particle resulting from vapour condensation
D. A solid particle, e.g., fllyash
Answer: Option B
Solution (By Examveda Team)
Smog is air pollution that reduces visibility. The term "smog" was first used in the early 1900s to describe a mix of smoke and fog. The smoke usually came from burning coal. Smog was common in industrial areas, and remains a familiar sight in cities today. Today, most of the smog we see is photochemical smog.This Question Belongs to General Knowledge >> Chemistry
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