JEE Main202330 Jan 2023Morning ShiftChemistryEnvironmental ChemistryActual
Formation of photochemical smog involves the following reaction in which A , B and C are respectively. (i) NO 2 ⟶ hu A + B (ii) B + O 2 → C (iii) A + C → NO 2 + O 2 Choose the correct answer from the options given below:
Options
- AO , NO and NO 3 -
- BO , N 2 O and NO
- CN , O 2 and O 3
- DNO , O and O 3
Correct answer
D. NO , O and O 3
Step-by-step solution
When fossil fuels are burnt, a variety of pollutants are emitted into the earth’s troposphere. When these pollutants build up to sufficiently high levels, a chain reaction occurs from their interaction with sunlight in which NO is converted into nitrogen dioxide ( NO 2 ). This NO 2 in turn absorbs energy from sunlight and breaks up into nitric oxide and free oxygen atom. NO 2   ( g ) → hv NO   ( g ) + O   ( g )     A   B - - - - - ( i ) Oxygen atoms are very reactive and co