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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceMatch the listMediumRecall

JEE Main 25 July 2022, Shift 2, Chemistry Q72

Question 72 of 90 in this shift, Chemistry question 12 of 30, Section A.

Match List I with List II. List I | List II A. Sulphate | I. Pesticide B. Fluoride | II. Bending of bones C. Nicotine | III. Laxative effect D. Sodium arsinite | IV. Herbicide Choose the correct answer from the options given below:
  1. (1)A-II, B-III, C-IV, D-I
  2. (2)A-IV, B-III, C-II, D-I
  3. (3)A-III, B-II, C-I, D-IVOfficial answer
  4. (4)A-III, B-II, C-IV, D-I

Official answer

Option 3

NTA final key.

Chapter
Environmental Chemistry
Topic
Environmental Chemistry
Idea tested
Drinking Water Standards: Fluoride Limits

Same idea in other shifts

Asked 3× in all
  1. 9 Apr 2024, Shift 1 · Q67The F−\mathrm{F^-} ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much…MediumSingle correct
  2. 26 Aug 2021, Shift 1 · Q40The conversion of hydroxyapatite occurs due to presence of F−\mathrm{F^-} ions in water. The correct formula of hydroxyapatite is :MediumSingle 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.