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Friday, 9 October

JEE Main 2024 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 6 April 2024, Shift 2, Chemistry Q78

Question 78 of 90 in this shift, Chemistry question 18 of 30, Section A.

Consider the given reaction, identify the major product P. CH3−COOH\mathrm{CH_3-COOH} →(i) LiAlH4 (ii) PCC (iii) HCN/O‾H (iv) H2O/O‾H, Δ\xrightarrow{\text{(i) LiAlH}_4\ \text{(ii) PCC}\ \text{(iii) HCN/}\overline{\mathrm{O}}\mathrm{H}\ \text{(iv) H}_2\mathrm{O}/\overline{\mathrm{O}}\mathrm{H},\ \Delta} "P"
  1. (1)CH3−CH(OH)−COOH\mathrm{CH_3-CH(OH)-COOH}Official answer
  2. (2)CH3−CO−CH2CH3\mathrm{CH_3-CO-CH_2CH_3}
  3. (3)CH3−CH2−CO−NH2\mathrm{CH_3-CH_2-CO-NH_2}
  4. (4)CH3−CH2−CH2−OH\mathrm{CH_3-CH_2-CH_2-OH}

Official answer

Option 1

NTA final key.

Chapter
Aldehydes, Ketones and Carboxylic Acids
Topic
Nucleophilic Addition
Idea tested
Cyanohydrin Formation

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. 31 Jan 2024, Shift 1 · Q89The product of the following reaction is P. 4-Hydroxybenzaldehyde, (i) PhMgBr (1 equiv.), (ii) aq. NH4Cl\mathrm{NH_4Cl}, gives P The number…MediumNumerical valueHas a figure
  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. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.