JEE Main202125 Jul 2021Evening ShiftChemistryEnvironmental ChemistryActual
Given below are two statements : Statement I : Chlorofluoro carbons breakdown by radiation in the visible energy region and release chlorine gas in the atmosphere which then reacts with stratospheric ozone. Statement II : Atmospheric ozone reacts with nitric oxide to give nitrogen and oxygen gases, which add to the atmosphere. For the above statements choose the correct answer from the options given below :
Options
- AStatement I is incorrect but statement II is true
- BBoth statement I and II are false
- CStatement I is correct but statement II is false
- DBoth statement I and II are correct
Correct answer
B. Both statement I and II are false
Step-by-step solution
Statement I : CFCs are broken down by powerful UV radiation and releases chlorine free radical which reacts with ozone and start chain reaction. Statement II : Atmosphere ozone reacts with nitric oxide to produce nitrogen dioxide and oxygen. NO ( g ) + O 3 ( g ) → NO 2 ( g ) + O 2 ( g )