JEE Main 2020 · ChemistryNumerical answerNumerical valueEasyMulti-step

JEE Main 6 September 2020, Shift 2, Chemistry Q50

Question 50 of 75 in this shift, Chemistry question 25 of 25.

A solution of phenol in chloroform when treated with aqueous NaOH gives compound P as a major product. The mass percentage of carbon in P is ________. (to the nearest integer) (Atomic mass : C = 12; H = 1; O = 16)

Official answer

69.00

NTA final key (Sep 2020).

Chapter: Alcohols, Phenols and Ethers
Topic: Alcohols and Phenols
Idea tested: Reimer-Tiemann Reaction

Same idea in other shifts

Asked 9× in all

6 Apr 2024, Shift 1 · Q78In Reimer - Tiemann reaction, phenol is converted into salicylaldehyde through an intermediate. The structure of intermediate is __________.EasyDiagram basedHas a figure
8 Apr 2024, Shift 2 · Q77Match List - I with List - II. List - I (Reactions) | List - II (Products) (A) aniline ( $\mathrm{C_6H_5NH_2}$ ) with (i)…MediumMatch the listHas a figure
30 Jan 2024, Shift 2 · Q76Salicylaldehyde is synthesized from phenol, when reacted withEasySingle correct
25 Jun 2022, Shift 1 · Q76The intermediate X, in the reaction : [figure: $\mathrm{CHCl_3}$ + Aq. NaOH + benzene ring with OH substituent, arrow to [X]; below [X] an…EasyDiagram basedHas a figure
27 Jun 2022, Shift 2 · Q75Match List I with List II. List I | List II A. [drawn: benzene ring bearing OH $\rightarrow$ benzene ring bearing OH and, on a…MediumMatch the listHas a figure
4 Aug 2021, Shift 1 · Q46Match List I with List II List I List II A. Kolbe's Reaction I. [structure: benzene ring with a CHO substituent] B. Gatterman-Koch…MediumMatch the listHas a figure
26 Feb 2021, Shift 1 · Q45Identify the major products A and B respectively in the following reactions of phenol : [reaction scheme, see figure_note]MediumDiagram basedHas a figure
22 Jul 2021, Shift 2 · Q45An organic compound A ( $\mathrm{C_6H_6O}$ ) gives dark green colouration with ferric chloride. On treatment with $\mathrm{CHCl_3}$ and KOH,…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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.