27
What role does UV radiation play in the formation of the ozone layer ? Explain the process with relevant chemical reactions. Why is the excessive use of CFCs (Chlorofluoro Carbons) is a cause of concern for organisms ?
Show SolutionHide Solution↓
UV radiation split apart molecular oxygen into free oxygen atom necessary for ozone formation. (1 Mark)
$\ce{O2 ->[UV] O + O}$ (1 Mark)
$\ce{O + O2 -> O3}$ (ozone) (1 Mark)
Excessive use of CFCs causes depletion of ozone layer. This allows more UV radiation entering the earth's atmosphere. That is highly damaging to organisms / cause skin cancer in humans. (1 Mark)
$\ce{O2 ->[UV] O + O}$ (1 Mark)
$\ce{O + O2 -> O3}$ (ozone) (1 Mark)
Excessive use of CFCs causes depletion of ozone layer. This allows more UV radiation entering the earth's atmosphere. That is highly damaging to organisms / cause skin cancer in humans. (1 Mark)