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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceMatch the listMediumRecall

JEE Main 28 July 2022, Shift 2, Chemistry Q46

Question 46 of 90 in this shift, Chemistry question 16 of 30, Section A.

Match **List I** with **List II** List I (Polymer) | List II (Nature) A. −[CH2−C(Cl)=CH−CH2]n−-\left[\mathrm{CH_2-C(Cl)=CH-CH_2}\right]_n- | I. Thermosetting polymer B. −[NH−(CH2)6−NH−C(=O)−(CH2)4−C(=O)]n−-\left[\mathrm{NH-(CH_2)_6-NH-C(=O)-(CH_2)_4-C(=O)}\right]_n- | II. Fibers C. −[CH2−CH(Cl)]n−-\left[\mathrm{CH_2-CH(Cl)}\right]_n- | III. Elastomer D. [figure: repeat unit drawn as two benzene rings, each bearing O-H, joined through CH2\mathrm{CH_2} groups, in brackets with subscript nn] | IV. Thermoplastic polymer Choose the correct answer from the options given below :

The figure, in words

List I shows four polymer repeat units drawn in brackets with subscript n: chloroprene unit, nylon-6,6 unit, PVC unit, and a novolac/Bakelite-type phenol-formaldehyde unit with OH-bearing rings joined by CH2.
  1. (1)A-II, B-III, C-IV, D-I
  2. (2)A-III, B-II, C-IV, D-IOfficial answer
  3. (3)A-III, B-I, C-IV, D-II
  4. (4)A-I, B-III, C-IV, D-II

Official answer

Option 2

NTA final key.

Chapter
Polymers
Topic
Polymers
Idea tested
Polymer Classification

Same idea in other shifts

Asked 9× in all
  1. 10 Apr 2023, Shift 1 · Q77Match List I with List II List I (Polymer) List II (Type / Class) (A) Nylon-2-Nylon-6 (I) Thermosetting polymer (B) Buna-N (II)…EasyMatch the list
  2. 12 Apr 2023, Shift 1 · Q80Match List I with List II LIST I (Examples) / LIST II (Type) A. 2-chloro-1,3- butadiene - I. Biodegradable polymer B. Nylon 2-nylon 6 -…EasyMatch the list
  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. 29 Jul 2022, Shift 2 · Q78Which of the following is NOT a natural polymer?EasySingle correct
  5. 26 Jun 2022, Shift 1 · Q78Which of the following sets are correct regarding polymer ? (A) Copolymer : Buna–S (B) Condensation polymer : Nylon–6,6 (C) Fibres :…EasyOther
  6. 29 Jun 2022, Shift 1 · Q77The polymer, which can be stretched and retains its original status on releasing the force isEasySingle correct
  7. 3 Aug 2021, Shift 1 · Q47Match List I with List II : List I - Polymer : A. Bakelite ; B. HDP ; C. LDP ; D. Rayon List II - Type : I. Branched chain ; II. Linear ;…EasyMatch the list
  8. 3 Aug 2021, Shift 2 · Q49Select the odd groupMediumSingle 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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.