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Saturday, 31 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 idea in other shifts

Asked 2× in all
  1. 31 Aug 2021, Shift 1 · Q47The structure of product C, formed by the following sequence of reactions is :…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.