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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceAssertion–reasonEasyRecall

JEE Main 26 August 2021, Shift 2, Chemistry Q41

Question 41 of 90 in this shift, Chemistry question 11 of 30, Section A.

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 :
  1. (1)Both (A) and (R) are true and (R) is the true explanation of (A).Official answer
  2. (2)Both (A) and (R) are true but (R) is not the true explanation of (A).
  3. (3)(A) is true but (R) is false.
  4. (4)(A) is false but (R) is true.

Official answer

Option 1

NTA final key.

Chapter
Environmental Chemistry
Topic
Environmental Chemistry
Idea tested
Secondary Pollutants in Photochemical Smog

Same idea in other shifts

Asked 2× in all
  1. 30 Jul 2022, Shift 2 · Q41Which of the following is not a component of photochemical smog?EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.