26
How is ozone layer formed in our atmosphere ? State one important role of ozone in our atmosphere. What is responsible for its depletion ?
Show SolutionHide Solution↓
$\bullet \quad \ce{O2 ->[UV] O + O}$
$\ce{O2 + O -> O3}$
(Ozone) (1)
Alternate Answer
$\bullet$ The higher energy UV radiations split apart some
molecular oxygen (O2) into free oxygen atoms which
then combine with the molecular Oxygen (O2) to
form Ozone. (1)
$\bullet$ Role: It prevents harmful UV rays to reach earth's atmosphere. ($\frac{1}{2}$)
$\bullet$ CFCs (Chlorofluorocarbons) ($\frac{1}{2}$)
$\ce{O2 + O -> O3}$
(Ozone) (1)
Alternate Answer
$\bullet$ The higher energy UV radiations split apart some
molecular oxygen (O2) into free oxygen atoms which
then combine with the molecular Oxygen (O2) to
form Ozone. (1)
$\bullet$ Role: It prevents harmful UV rays to reach earth's atmosphere. ($\frac{1}{2}$)
$\bullet$ CFCs (Chlorofluorocarbons) ($\frac{1}{2}$)