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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceMatch the listMediumRecall

JEE Main 27 July 2022, Shift 1, Chemistry Q76

Question 76 of 90 in this shift, Chemistry question 16 of 30, Section A.

Match List I with List II. List I (Polymers) | List II (Commercial names) A. Phenol-formaldehyde resin | I. Glyptal B. Copolymer of 1,3-butadiene and styrene | II. Novolac C. Polyester of glycol and phthalic acid | III. Buna-S D. Polyester of glycol and terephthalic acid | IV. Dacron Choose the correct answer from the options given below:
  1. (1)A-II, B-III, C-IV, D-I
  2. (2)A-II, B-III, C-I, D-IVOfficial answer
  3. (3)A-II, B-I, C-III, D-IV
  4. (4)A-III, B-II, C-IV, D-I

Official answer

Option 2

NTA final key.

Chapter
Polymers
Topic
Polymers
Idea tested
Novolac Intermediate Formation

Same idea in other shifts

Asked 2× in all
  1. 26 Aug 2021, Shift 1 · Q49The polymer formed on heating Novolac with formaldehyde is :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.