Botany - Environmental Issues Question with Solution | TestHub
Which of the following statements above about ozone are not true?
a) Ozone is formed in the stratosphere.
b) Ozone is good in the troposphere and bad in the stratosphere.
c) Ozone depletion is maximum near poles.>
Options:
Answer:
Solution:
Ozone or trioxygen, is a triatomic molecule, consisting of three oxygen atoms. Ozone is formed from dioxygen by the action of ultraviolet light and also atmospheric electrical discharges, and is present in low concentrations throughout the Earth's atmosphere.
Ozone occurs in two layers of the atmosphere.
a) The ozone that is commonly associated with ozone depletion and the ozone “hole” is in the stratosphere, a layer that extends upward from about 10 to 30 miles (15 to 50 kilometers) above the earth. This “good” ozone shields life on earth from the sun's harmful ultraviolet rays (UV-b).
b)The layer surrounding the earth's surface is the troposphere. Here, ground-level or "bad" ozone is an air pollutant that damages human health, vegetation, and many common materials. A number of gaseous pollutants likeCH4, CFC′s,N2Ocause depletion of the ozone layer and create ozone holes. The depletion of the Ozone layer allows more UV radiation to reach the earth's surface. UV rays inhibit photosynthesis in plants, causes, Skin cancer. It damages nucleic acids in living organisms.
