Which of the following is true for classical smog?
It is called oxidising smog
It is a mixture of unsaturated hydrocarbons and Oxides of Nitrogen
It is a mixture of smoke, fog and Sulphur dioxide
All of these
As we have learnt,
Classical smog is also known as reducing smog and is a mixture of smoke, fog and Sulphur dioxide
Hence, the correct answer is Option (3)