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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceOtherMediumConceptual

JEE Main 3 September 2020, Shift 2, Chemistry Q28

Question 28 of 75 in this shift, Chemistry question 3 of 25.

Consider the following molecules and statements related to them : (A) [figure] (B) [figure] (a) (B) is more likely to be crystalline than (A) (b) (B) has higher boiling point than (A) (c) (B) dissolves more readily than (A) in water Identify the correct option from below :

The figure, in words

(A): benzene ring drawn as a hexagon with a circle inside; one ring carbon bears O-H, the adjacent ring carbon bears a C atom with a double-bonded O below and an O-H to the right. (B): benzene ring drawn as a hexagon with a circle inside; one ring carbon bears O-H (upper right) and the ring carbon on the opposite side bears a C atom with a double-bonded O below and an O-H (H above O) at its upper left.
  1. (1)(a) and (b) are trueOfficial answer
  2. (2)only (a) is true
  3. (3)(a) and (c) are trueOfficial answer
  4. (4)(b) and (c) are trueOfficial answer

Official answer

Options 1 and 3 and 4

NTA final key (Sep 2020): multiple options accepted. Either option scored full marks.

Chapter
Alcohols, Phenols and Ethers
Topic
Organic Acidity and Basicity
Idea tested
Intramolecular H-Bonding in Phenols

Same idea in other shifts

Asked 2× in all
  1. 27 Aug 2021, Shift 2 · Q46The compound/s which will show significant intermolecular H-bonding is/are : [three structures drawn: (a) a benzene ring with…MediumDiagram 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.