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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyApplication

JEE Main 18 March 2021, Shift 2, Chemistry Q44

Question 44 of 90 in this shift, Chemistry question 14 of 30, Section A.

Main Products formed during a reaction of 1-methoxy naphthalene with hydroiodic acid are :

The figure, in words

Each option is a drawn two-ring fused aromatic skeleton (substituent I or OH on the right-hand ring) followed by printed text.
  1. (1)[figure: two fused six-membered rings (aromatic) with I attached to the ring carbon at the top of the right-hand ring, next to the ring-fusion carbon] and CH3I\mathrm{CH_3I}
  2. (2)[figure: two fused six-membered rings (aromatic) with I attached to the ring carbon at the top of the right-hand ring, next to the ring-fusion carbon] and CH3OH\mathrm{CH_3OH}
  3. (3)[figure: two fused six-membered rings (aromatic) with OH attached to the ring carbon at the top of the right-hand ring, next to the ring-fusion carbon] and CH3OH\mathrm{CH_3OH}
  4. (4)[figure: two fused six-membered rings (aromatic) with OH attached to the ring carbon at the top of the right-hand ring, next to the ring-fusion carbon] and CH3I\mathrm{CH_3I}Official answer

Official answer

Option 4

NTA final key.

Chapter
Alcohols, Phenols and Ethers
Topic
Ethers
Idea tested
Cleavage of Alkyl-Aryl Ethers

Same idea in other shifts

Asked 3× in all
  1. 29 Jan 2024, Shift 1 · Q77The major product (P) in the following reaction isMediumDiagram basedHas a figure
  2. 28 Jul 2022, Shift 2 · Q44Compound I is heated with Conc. HI to give a hydroxy compound A which is further heated with Zn dust to give compound B. Identify A and B.…EasyDiagram basedHas 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. 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.