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Friday, 9 October

JEE Main 2020 · ChemistryMultiple choiceMatch the listEasyRecall

JEE Main 6 September 2020, Shift 2, Chemistry Q27

Question 27 of 75 in this shift, Chemistry question 2 of 25.

The correct match between Item - I and Item - II is : Item - I / Item - II (a) Natural rubber (I) 1, 3-butadiene + styrene (b) Neoprene (II) 1, 3-butadiene + acrylonitrile (c) Buna-N (III) Chloroprene (d) Buna-S (IV) Isoprene
  1. (1)(a) - (III), (b) - (IV), (c) - (I), (d) - (II)
  2. (2)(a) - (III), (b) - (IV), (c) - (II), (d) - (I)
  3. (3)(a) - (IV), (b) - (III), (c) - (I), (d) - (II)
  4. (4)(a) - (IV), (b) - (III), (c) - (II), (d) - (I)Official answer

Official answer

Option 4

NTA final key (Sep 2020).

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

Same topic in other shifts

All Polymers questions
  1. 6 Apr 2023, Shift 1 · Q79Polymer used in orlon is:EasySingle correct
  2. 11 Apr 2023, Shift 1 · Q78The polymer X - consists of linear molecules and is closely packed. It is prepared in the presence of triethylaluminium and titanium…EasySingle correct
  3. 13 Apr 2023, Shift 2 · Q80Match List I with List II LIST I | LIST II A. Weak intermolecular forces of attraction | I. Hexamethylenediamine + adipic acid B. Hydrogen…MediumMatch the list
  4. 25 Jul 2022, Shift 1 · Q77Melamine polymer is formed by the condensation of :EasyDiagram basedHas a figure
  5. 28 Jul 2022, Shift 1 · Q77Terylene polymer is obtained by condensation of :EasySingle correct
  6. 24 Jun 2022, Shift 1 · Q77Which of the following is an example of polyester ?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 42 of the 174 JEE Main shifts held from 2017 to 2026.