The term 'smog' is a combination of ____________.
Smoke and fog
Smog is a portmanteau — a word made by blending two others. It is formed from Smoke + fog, giving "smog." The term was coined in the early twentieth century to describe the thick, hazardous haze that hangs over polluted cities, sharply reducing visibility and irritating the eyes and respiratory tract.
Because the word literally combines smoke and fog, that is the correct answer. The other choices fail on the basic word-formation: "smoke and haze," "fog and clouds," and the option that repeats "smog" itself do not give the letters that actually build the word smog (sm- from smoke and -og from fog).
There are two classic types of smog, which are worth distinguishing:
| Type | Formed by | Conditions |
|---|---|---|
| Sulphurous (London-type / classic) smog | Smoke + fog + SO₂ from burning coal | Cold, damp, still air |
| Photochemical (Los Angeles-type) smog | NOₓ + volatile organic compounds reacting in sunlight to form ozone and other oxidants | Warm, sunny, high traffic |
Both types cause respiratory illness, eye irritation, lower crop yields, and dangerous reductions in visibility, which is why smog is treated as a serious form of air pollution.
Similar Questions
The primary method of managing biodegradable domestic waste after collection is _________________.
A farmer applies large amounts of chemical fertilizers over several years. Which consequence most likely results from this practice leading to soil pollution?
The pollutant group commonly associated with oil spills in oceans is ______________.
The term 'smog' is a combination of ____________.
Biomedical waste handlers in a hospital are at risk of occupational hazards. The most effective way to protect them from exposure to infectious materials is:
A field exposed to excessive pesticide use shows a sharp decline in earthworm population. The resulting effect on soil is:
The primary method of managing biodegradable domestic waste after collection is _________________.
The term ‘smog’ is a combination of ____________.
A field exposed to excessive pesticide use shows a sharp decline in earthworm population. The resulting effect on soil is:
Biomedical waste handlers in a hospital are at risk of occupational hazards. The most effective way to protect them from exposure to infectious materials is:
Important Questions from Ecology and Environment
The Imperial Forest Research Institute was set up in 1906 in:
Buxa Tiger Reserve is located in:
Which day is celebrated as the World Environment Day?
Which Indian products are issued with eco - mark?
Degradation of global environment has not resulted in one of the following.
