Which of the following options means that the fog which has been polluted by smoke?

A. Skog

B. Pollutant

C. Clog

D. Smog

Question

Question

This question was previously asked in

NTPC Tier I (Held On: 12 Apr 2016 Shift 2)

Answer 1

The correct answer is Smog.

Key Points

Smog means that the fog has been polluted by smoke.
- Smog is a type of intense air pollution.
- The word "smog" was coined in the early 20th century and is a contraction of the words smoke and fog to refer to smoky fog due to its opacity, and odor.
- The word was then intended to refer to what was sometimes known as pea soup fog, a familiar and serious problem in London from the 19th century to the mid-20th century.
- This kind of visible air pollution is composed of nitrogen oxides, sulfur oxides, ozone, smoke, and other particulates.
Hence, option 2 is correct.