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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 26 February 2021, Shift 1, Chemistry Q39

Question 39 of 90 in this shift, Chemistry question 9 of 30, Section A.

The presence of ozone in troposphere :
  1. (1)protects us from the UV radiation
  2. (2)protects us from the X-ray radiation
  3. (3)generates photochemical smogOfficial answer
  4. (4)protects us from greenhouse effect

Official answer

Option 3

NTA final key.

Chapter
Environmental Chemistry
Topic
Environmental Chemistry
Idea tested
Primary Reactions of Photochemical Smog

Same idea in other shifts

Asked 2× in all
  1. 15 Apr 2023, Shift 1 · Q71The possibility of photochemical smog formation will be minimum atEasySingle 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.