Question

What is ozone where is ozone layer present in our atm?

Answer 1

A poisonous gas which is a form of oxygen is called ozone
Ozone layer is present in the Stratosphere.

Answer 2

A colorless unstable toxic gas with a pungent odor and powerful oxidizing properties, formed from oxygen by electrical discharges or ultraviolet light. It differs from normal oxygen (O2) in having three atoms in its molecule (O3).This is known as Ozone i.e., O3.

Ozone is mainly found in two regions of the Earth's atmosphere. Most ozone (about 90%) resides in a layer that begins between 6 and 10 miles (10 and 17 kilometers) above the Earth's surface and extends up to about 30 miles (50 kilometers). This region of the atmosphere is called the stratosphere.