Question

The atmospheric pollutants or gases that form smog are released in the air ________.

• A. when some thing burnt
• B. when fuels are burnt.
• C. when wool is burnt
• D. none of these

Answer 1

Answer: (B)

when fuels are burnt.

The word smog was coined to describe the combination of smoke and fog.

$\text{Smoke}+\text{Fog}\to \text{Smog}$

The name was proposed to describe the phenomenon which occurred due to condensation of some kind of fog on the carbon particles present in the smoke produced due to combustion of fuels like coal and petroleum.

Thus, the atmospheric pollutants or gases that form smog are released in the air when fuels are burnt.

Hence, the correct option is $\text{B}$