The maximum concentration of Ozone gas is found in which atmospheric layer?

In which layer of the Earth's atmosphere is the concentration of ozone gas maximum?

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

Most ozone gas (about 90%) is located in the atmospheric layer of

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

Which of the following gas is primarily responsible for the depletion of the stratospheric Ozone layer?