Ultraviolet radiation from sunlight causes a photochemical reaction producing which of the following pollutants?

Ozone layer, which absorbs the ultra-violet radiation, is found in which one of the following layers of the atmosphere?

Which of the following causes adiabatic temperature changes in atmosphere?

Which one of the following is the major cause of stratospheric ozone layer degradation?

Which among the following layers of the atmosphere reflects radio waves back to Earth, aiding radio communication?

Which one of following is the most important factor for the formulation of smog?