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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 8 January 2020, Shift 2, Chemistry Q43

Question 43 of 75 in this shift, Chemistry question 18 of 25, Section A.

Preparation of Bakelite proceeds via reactions :
  1. (1)Electrophilic substitution and dehydrationOfficial answer
  2. (2)Electrophilic addition and dehydration
  3. (3)Nucleophilic addition and dehydration
  4. (4)Condensation and elimination

Official answer

Option 1

NTA final key (Jan 2020).

Chapter
Polymers
Topic
Polymers
Idea tested
Novolac to Bakelite Transition

Same topic in other shifts

All Polymers questions
  1. 6 Apr 2023, Shift 1 · Q79Polymer used in orlon is:EasySingle correct
  2. 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
  3. 10 Apr 2023, Shift 2 · Q78Buna-S can be represented as:EasySingle correct
  4. 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
  5. 11 Apr 2023, Shift 2 · Q80Given below are two statements : Statement I : Ethene at 333 to 343K and 6-7 atm pressure in the presence of AlEt3\mathrm{AlEt_3} and…MediumTwo statements
  6. 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

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.