Dioxygen and ozone

The zone which extends above troposphere up to 50 km above sea level and contains dinitrogen, dioxygen , ozone and little water vapour is called

Dioxygen can be prepared by

Which of the following gives dioxygen and metal on heating?

The compound which is used to produce dioxygen and to remove carbon dioxide in submarines is

What is bad ozone and good ozone ?

Good ozone and bad ozone is found respectively in

Good ozone and Bad ozone are found is__________and ________respectively.