Question

Describe the industrial preparation method of ozone with the diagram? What is ozonosphere? Describe its importance in nature.

Answer 1

A silent electric discharge is passed through dry, pure and cold oxygen in Siemen's and Brodie's ozoniser.
$3O_2\rightleftharpoons 2O_3$ $\Delta H=+$ 68 kcal.
Ozonised oxygen is obtained which contains 5-10% ozone by volume.
Ozonosphere is the region of atomosphere with relative high concentration of ozone compared to other parts of atmosphere.
Around 97% of ozone is present in this layer.
Importance of ozonosphere:
It absorbs harmful solar UV radiations of wavelength less than 0.4 micron. This UV radiation can cause skin cancer.