Which of the following is a major air pollutant?

Smog is primarily caused by the presence of which of the following?

The irritant red haze in traffic and congested places is due to the presence of which of the following?
$(i)$ Oxides of sulphur
$(ii)$ Oxides of nitrogen
$(iii)$ Carbon dioxide
$(iv)$ Mists,smoke and dust
$(v)$ Smog

Statues and monuments in India are affected by acid rain. How?

Name the pollutants found in the troposphere.

The reaction that is $NOT$ involved in the ozone layer depletion mechanism in the stratosphere is