In stratosphere , which one of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen ?

Options

A. Fe
B. Cl
C. Carbon
D. Oxygen

Answer

B

Explanation

In stratosphere , Cl acts as a catalyst in the degradation of ozone and release of molecular oxygen . It is released by action of UV rays on a chlorofluorocarbon . Chlorine reacts with ozone in a series of chain reaction , converting it into oxygen . One active chlorine can destroy 5000 molecules of ozone in one month .
`CFCl_(3) overset(UV-C)(to) CFCl_(2) + Cl`
`CFCl_(2) overset(UV-C)(to) CFCl + Cl`
`Cl + O_(3) to ClO + O_(2)`
`ClO + O_(3) to Cl + 2O_(2)`
Iron (Fe) , carbon (C) and oxygen (O) are not Ozone Depleting Substances (ODS).