JEE Main202126 Aug 2021Evening ShiftChemistryEnvironmental ChemistryActual
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason ( R ) Assertion (A) : Photochemical smog causes cracking of rubber. Reason (R): Presence of ozone, nitric oxide, acrolein, formaldehyde and peroxyacetyl nitrate in photochemical smog makes it oxidizing. Choose the most appropriate answer from the options given below :
Options
- A( A ) is false but ( R ) is true.
- BBoth ( A ) and ( R ) are true but ( R ) is not the true explanation of ( A ) .
- CBoth ( A ) and ( R ) are true and ( R ) is the true explanation of ( A ) .
- D(A) is true but ( R ) is false.
Correct answer
C. Both ( A ) and ( R ) are true and ( R ) is the true explanation of ( A ) .
Step-by-step solution
Photochemical smog has high concentration of oxidising agents and is, therefore, called as oxidising smog. The common components of photochemical smog are ozone, nitric oxide, acrolein, formaldehyde and peroxyacetyl nitrate (PAN). Photochemical smog causes serious health problems. Both ozone and PAN act as powerful eye irritants. Ozone and nitric oxide irritate the nose and throat and their high concentration causes headache, chest pain, dryness of the throat, cough and difficulty in breathing. Photochemical smog l