The photochemical smog does not generally contain

Step-by-step solution

The major components of photochemical smog are nitrogen oxides, ozone O 3 , PAN (peroxyacetylnitrate), and chemical compounds that contain the- CHO group (aldehydes). PAN and aldehydes can cause eye irritation and plant damage if their concentrations are sufficiently high. Classical smog occurs in a cool, humid climate. Its components include smoke, fog and sulphur dioxide. It is reducing in nature.