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Friday, 9 October

JEE Main 2024 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 31 January 2024, Shift 1, Chemistry Q89

Question 89 of 90 in this shift, Chemistry question 29 of 30, Section B.

The product of the following reaction is P. 4-Hydroxybenzaldehyde, (i) PhMgBr (1 equiv.), (ii) aq. NH4Cl\mathrm{NH_4Cl}, gives P The number of hydroxyl groups present in the product P is __________.

The figure, in words

4-hydroxybenzaldehyde (CHO at top, OH at bottom of benzene ring) treated with (i) PhMgBr (1 equiv.), (ii) aq. NH4Cl giving P

Official answer

0

NTA final key.

Chapter
Aldehydes, Ketones and Carboxylic Acids
Topic
Nucleophilic Addition
Idea tested
Grignard Enolization Competition

Same topic in other shifts

All Nucleophilic Addition questions
  1. 2 Apr 2026, Shift 2 · Q67A molecule (X) with following structure under mild acidic condition is hydrolysed to produce (Y) and (Z). Identify the correct statements…MediumSingle correct
  2. 5 Apr 2026, Shift 2 · Q66Given below are two statements : Statement I : The condensation reaction between CH3−CH=O\mathrm{CH_3-CH=O} and H2N−NH−C(=O)−NH2\mathrm{H_2N-NH-C(=O)-NH_2}…MediumTwo statements
  3. 7 Apr 2025, Shift 2 · Q68"P" is an optically active compound with molecular formula C6H12O\mathrm{C_6H_{12}O}. When 'P' is treated with 2, 4-dinitrophenylhydrazine, it…MediumDiagram basedHas a figure
  4. 6 Apr 2024, Shift 2 · Q78Consider the given reaction, identify the major product P. CH3−COOH\mathrm{CH_3-COOH}…MediumSingle correct
  5. 24 Jun 2022, Shift 1 · Q89Number of electrophilic centres in the given compound is ______.MediumNumerical valueHas a figure
  6. 25 Jul 2021, Shift 1 · Q43[figure: but-3-en-2-one, CH2=CH-C(=O)-CH3, treated with (i) C2H5MgBr\mathrm{C_2H_5MgBr}, dry ether (ii) H2O\mathrm{H_2O}, HCl giving P (Major…HardSingle correctHas 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.