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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceSingle correctMediumApplication

JEE Main 28 July 2022, Shift 1, Chemistry Q76

Question 76 of 90 in this shift, Chemistry question 16 of 30, Section A.

Identify the correct statement for the below given transformation. CH3−CH2−CH2−CH−CH3\mathrm{CH_3-CH_2-CH_2-CH-CH_3} with N⊕(CH3)3\mathrm{N^{\oplus}(CH_3)_3} on the CH carbon →C2H5OHC2H5ONa\xrightarrow[\mathrm{C_2H_5OH}]{\mathrm{C_2H_5ONa}} A (Major) + B (Minor)
  1. (1)A - CH3CH2CH=CH−CH3\mathrm{CH_3CH_2CH=CH-CH_3}, B - CH3CH2CH2CH=CH2\mathrm{CH_3CH_2CH_2CH=CH_2}, Saytzeff products
  2. (2)A - CH3CH2CH=CH−CH3\mathrm{CH_3CH_2CH=CH-CH_3}, B - CH3CH2CH2CH=CH2\mathrm{CH_3CH_2CH_2CH=CH_2}, Hofmann products
  3. (3)A - CH3CH2CH2CH=CH2\mathrm{CH_3CH_2CH_2CH=CH_2}, B - CH3CH2CH=CHCH3\mathrm{CH_3CH_2CH=CHCH_3}, Hofmann productsOfficial answer
  4. (4)A - CH3CH2CH2CH=CH2\mathrm{CH_3CH_2CH_2CH=CH_2}, B - CH3CH2CH=CHCH3\mathrm{CH_3CH_2CH=CHCH_3}, Saytzeff products

Official answer

Option 3

NTA final key (2022 Session 2).

Chapter
Amines
Topic
Amines
Idea tested
Hofmann Elimination of Quaternary Salts

Same idea in other shifts

Asked 2× in all
  1. 3 Aug 2021, Shift 1 · Q42Find out the correct major product from the following reaction (Me = – CH3\mathrm{CH_3})MediumSingle correctHas a figure

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.