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Saturday, 10 October

JEE Main 2025 · ChemistryMultiple choiceOtherMediumMulti-step

JEE Main 2 April 2025, Shift 2, Chemistry Q68

Question 68 of 75 in this shift, Chemistry question 18 of 25, Section A.

Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product ? (A) R−C≡N→mild condition(i) H+/H2O\mathrm{R-C{\equiv}N} \xrightarrow[\text{mild condition}]{\text{(i) H}^+/\mathrm{H_2O}} (B) R−MgX→(ii) H3O+(i) CO2\mathrm{R-MgX} \xrightarrow[\mathrm{(ii)\ H_3O^+}]{\mathrm{(i)\ CO_2}} (C) R−C≡N→(ii) H3O+(i) SnCl2/HCl\mathrm{R-C{\equiv}N} \xrightarrow[\mathrm{(ii)\ H_3O^+}]{\mathrm{(i)\ SnCl_2/HCl}} (D) R⋅CH2⋅OH→PCC\mathrm{R{\cdot}CH_2{\cdot}OH} \xrightarrow{\text{PCC}} (E) C6H5-COCl→(ii) Br2 water(i) H2∣Pd−BaSO4\mathrm{C_6H_5\text{-}COCl} \xrightarrow[\mathrm{(ii)\ Br_2\ water}]{\mathrm{(i)\ H_2|Pd-BaSO_4}} (benzoyl chloride, benzene ring drawn) Choose the correct answer from the options given below :

The figure, in words

Reaction (E) starts from benzoyl chloride (benzene ring bearing COCl).
  1. (1)A, B and E only
  2. (2)B, C and E only
  3. (3)B and E onlyOfficial answer
  4. (4)A and D only

Official answer

Option 3

NTA final key.

Chapter
Aldehydes, Ketones and Carboxylic Acids
Topic
Carboxylic Acids and Derivatives
Idea tested
Carboxylic Acid Synthesis via Grignard and CO2

Same topic in other shifts

All Carboxylic Acids and Derivatives questions
  1. 5 Apr 2026, Shift 2 · Q65Complete the following reaction sequence and give the name of major product 'P'. CH3CH2C≡N\mathrm{CH_3CH_2C{\equiv}N}…MediumSingle correctHas a figure
  2. 8 Apr 2026, Shift 2 · Q67Consider the following reaction. [figure: N-substituted 2-piperidone (six-membered lactam, C=O adjacent to ring N) with N bonded to…HardDiagram basedHas a figure
  3. 2 Apr 2025, Shift 1 · Q67Consider the following molecules : (p) CH3−CH2−C(=O)−Cl\mathrm{CH_3-CH_2-C(=O)-Cl} (q) CH3−CH2−C(=O)−O−C(=O)−CH3\mathrm{CH_3-CH_2-C(=O)-O-C(=O)-CH_3} (r)…EasySingle correctHas a figure
  4. 8 Apr 2025, Shift 2 · Q69A→(ii) H3O+(i) NaOHB→(ii) H2SO4,Δ(i) EtOHCA \xrightarrow[\text{(ii) H}_3\text{O}^+]{\text{(i) NaOH}} B \xrightarrow[\text{(ii) H}_2\text{SO}_4, \Delta]{\text{(i) EtOH}} C 'A'…MediumSingle correctHas a figure
  5. 8 Apr 2024, Shift 1 · Q79Identify the product (P) in the following reaction: [figure: cyclopentanecarboxylic acid]…EasyDiagram basedHas a figure
  6. 8 Apr 2024, Shift 1 · Q89Major product B of the following reaction has _________ π\pi-bond. [figure: ethylbenzene (C6H5CH2CH3\mathrm{C_6H_5CH_2CH_3})]…MediumNumerical valueHas 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 42 of the 174 JEE Main shifts held from 2017 to 2026.