Question

Correct statement about smog is 

(1) NO₂ is present in classical smog 

(2) Both NO₂ and SO₂ are present in classical smog 

(3) Photochemical smog has high concentration of oxidizing agents

(4) Classical smog also has high concentration of oxidizing agents

Answer 1

(3) Photochemical smog has high concentration of oxidizing agents

Photochemical smog has high concentration of oxidising agents NO₂ is produced from NO and O₃ in the presence of sunlight 

Classical smog contain smoke, fog and SO₂ and it is known as reducing smog, as chemically it is reducing mixture