Which of the following statements are true regarding photochemical smogA) It is oxidising in nature B) It is formed when intensity of solar radiation is very highC) It is formed by PAN, O3 and oxides of nitrogenD) It is formed by the particulate carbon and SO2E) It is reducing in nature

Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides in the atmosphere. It is visible as a brown haze, and is most prominent during the morning and afternoon, especially in densely populated, warm cities.Photochemical oxidants are found in 'photochemical smog' which is a complex mixture of primary and secondary air pollutants. The most important phytotoxic components produced by these atmospheric photochemical reactions are ozone and peroxyacetyl nitrate.