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Friday, 9 October

JEE Main 2020 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 8 January 2020, Shift 1, Chemistry Q41

Question 41 of 75 in this shift, Chemistry question 16 of 25, Section A.

Arrange the following compounds in increasing order of C−-OH bond length : methanol, phenol, p-ethoxyphenol
  1. (1)methanol < phenol < p-ethoxyphenol
  2. (2)phenol < p-ethoxyphenol < methanolOfficial answer
  3. (3)phenol < methanol < p-ethoxyphenol
  4. (4)methanol < p-ethoxyphenol < phenol

Official answer

Option 2

NTA final key (Jan 2020).

Chapter
Alcohols, Phenols and Ethers
Topic
Resonance and Hyperconjugation
Idea tested
Mesomeric Effect

Same idea in other shifts

Asked 6× in all
  1. 2 Apr 2026, Shift 2 · Q63Given below are two statements: Statement I: In…MediumSingle correct
  2. 6 Apr 2026, Shift 2 · Q63Shown below is the structure of methyl acetate with three different α\alpha, β\beta and γ\gamma carbon - oxygen bonds. The correct…MediumDiagram basedHas a figure
  3. 9 Apr 2024, Shift 1 · Q89How many compounds among the following compounds show inductive, mesomeric as well as hyperconjugation effects ? [figure: eight…MediumNumerical valueHas a figure
  4. 29 Jan 2024, Shift 1 · Q72The interaction between π\pi bond and lone pair of electrons present on an adjacent atom is responsible forEasySingle correct
  5. 9 Jan 2020, Shift 2 · Q40Which of the following has the shortest C-Cl bond ?MediumSingle 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. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.