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

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

Which among the following layers of Earth's atmosphere contains the Ozone layer?

Which one of the following gases is minimum by volume percentage in the Earth's atmosphere?

The protective Ozone Layer is predominantly located in which atmospheric layer of Earth?

The Earth's atmosphere is mainly heated by which one of the following?