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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceMatch the listEasyRecall

JEE Main 24 February 2021, Shift 1, Chemistry Q48

Question 48 of 90 in this shift, Chemistry question 18 of 30, Section A.

Match List I with List II. List I (Monomer Unit) List II (Polymer) (a) Caprolactum (i) Natural rubber (b) 2-Chloro-1,3-butadiene (ii) Buna-N (c) Isoprene (iii) Nylon 6 (d) Acrylonitrile (iv) Neoprene Choose the correct answer from the options given below :
  1. (1)(a) → (i), (b) → (ii), (c) → (iii), (d) → (iv)
  2. (2)(a) → (iv), (b) → (iii), (c) → (ii), (d) → (i)
  3. (3)(a) → (ii), (b) → (i), (c) → (iv), (d) → (iii)
  4. (4)(a) → (iii), (b) → (iv), (c) → (i), (d) → (ii)Official answer

Official answer

Option 4

NTA final key.

Chapter
Polymers
Topic
Polymers
Idea tested
Homopolymers vs Copolymers (Buna-S and Buna-N)

Same idea in other shifts

Asked 2× in all
  1. 6 Sep 2020, Shift 2 · Q27The correct match between Item - I and Item - II is : Item - I / Item - II (a) Natural rubber (I) 1, 3-butadiene + styrene (b) Neoprene…EasyMatch the list

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.