Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reaso — JEE Mains Chemistry Past Papers Chemistry Question
Question
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: (A) (A) is false but (R) is true. (B) Both (A) and (R) are true but (R) is not the true explanation of (A). (C) (A) is true but (R) is false. (D) Both (A) and (R) are true and (R) is the true explanation of (A). uhps nks dFku fn, gSaA ,d dk uke vfHkdFku (A) rFkk nwljs dk dkj.k (R) gSA. vfHkdFku (A) : izdk'k jklk;fud /kwe&dksgjk jcj esa njkj mRiUu djrk gSA dkj.k (R) : izdkj'k jklk;fud /kwe&dksgjk esa vkstksu] ukbfVªd vkWDlkbM] ,Øksyhu] QkesZfYMgkbM ,oa ijkWDlh,lhfVy ukbVªsV bls vkWDlhdkjd cukrs gaSA uhps fn, fodYiksa esa ls lokZf/kd mi;qDr mÙkj pqusa % (1) (A) lgh ugha gS ijUrq (R) lgh gSA (2) nksuksa (A) rFkk (R) lgh gSa rFkk (A) dh lgh O;k[;k (R) ugha gSA (3) (A) lgh gS ijUrq (R) lgh ugha gSA (4) nksuksa (A) rFkk (R) lgh gSa rFkk (A) dh lgh O;k[;k (R) gSA
💡 Solution & Explanation
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 leads to cracking of rubber and extensive damage to plant life. It also causes corrosion of metals, stones, building materials, rubber and painted surfaces.