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: 

Statement I: Classical smog is formed when oxides of nitrogen combine with particulate matter especially in summer season.

• When there is a high concentration of sulphur dioxide and particulate matter created as a result of fuel combustion, classic smog is formed.
• It happens in a chilly, humid climate. Sulphurous smog or London smog are other names for it, and it turns the air a dark, brownish colour.
• Due to its reducing agent properties, classic smog is also known as lowering smog. The presence of carbon (soot) particles and sulphur dioxide contributes to the reducing nature.

So, Statement I is incorrect. 

Statement II: Classical smog reduces atmospheric visibility to a great extent.

• Prior to the light reaching your eyes, the particles disperse it into and out of the line of sight and absorb some of it.
• In order to lower the clarity and colours of what you see, there are more particles in the air, which scatter and absorb light more.
• Smog is air pollution that makes it difficult to see. In the early 1900s, a mixture of smoke and fog was initially referred to as "smog."
• Coal burning was typically the source of the smoke. Industrial locations used to have a lot of smog, and certain cities still have it now.

So, Statement II is correct. 

Therefore, We can draw a conclusion from the above discussion that Statement I is false but Statement II is true