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Friday, 9 October

JEE Main 2022 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 24 June 2022, Shift 1, Chemistry Q77

Question 77 of 90 in this shift, Chemistry question 17 of 30, Section A.

Which of the following is an example of polyester ?
  1. (1)Butadiene-styrene copolymer
  2. (2)Melamine polymer
  3. (3)Neoprene
  4. (4)Poly-β\beta-hydroxybutyrate-co-β\beta-hydroxyvalerateOfficial answer

Official answer

Option 4

NTA final key (2022 Session 1).

Chapter
Polymers
Idea tested
PHBV Monomers

Same idea in other shifts

Asked 2× in all
  1. 9 Jan 2020, Shift 2 · Q42Which polymer has 'chiral' monomer(s) ?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 42 of the 174 JEE Main shifts held from 2017 to 2026.