Given below are two statements:
Statement I: Classical smog is formed when oxides of nitrogen combine with particulate matter especially in summer season.
Statement II: Classical smog reduces atmospheric visibility to a great extent.
In the light of the above statements, choose the correct answer from the options given below:

Correct option is D

Statement I: Classical smog, also known as "London smog" or "sulfurous smog," primarily forms under cool, humid conditions and is characterized by the presence of sulfur dioxide (SO₂) and particulate matter, not oxides of nitrogen. It typically occurs in winter rather than summer. The presence of sulfur dioxide, which arises from burning fossil fuels like coal, combines with water vapor and particulate matter to form a dense, toxic fog.
Statement II: This statement is correct. Classical smog indeed reduces atmospheric visibility significantly due to its dense, particulate-laden nature. The suspended particles scatter and absorb light, making it difficult to see through the smog.
Information Booster · Classical Smog (London Smog): It results from the combustion of sulfur-rich fossil fuels in damp, cold conditions, commonly seen in winter. The sulfur compounds and particulate matter in classical smog can cause severe health issues, especially respiratory problems.
· Photochemical Smog: This type of smog, which involves nitrogen oxides (NOₓ) and volatile organic compounds (VOCs) under sunlight, typically forms in the summer. This is sometimes confused with classical smog but is distinct due to its components and formation conditions.
· Reduction in Visibility: Both types of smog (classical and photochemical) impair visibility. However, classical smog is particularly dense, reducing visibility to a great extent due to the presence of fine particulate matter and water droplets.