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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceSingle correctMediumApplication

JEE Main 26 June 2022, Shift 2, Chemistry Q76

Question 76 of 90 in this shift, Chemistry question 16 of 30, Section A.

The final product 'A' in the following reaction sequence [drawn structure labelled CH3 CH2 - C - CH3 with O drawn below the carbon] --HCN--> ? --95% H2SO4\mathrm{H_2SO_4}, Heat--> A is

The figure, in words

Stem: drawn structure CH3 CH2 - C - CH3 with O drawn below the central carbon, arrow labelled HCN to '?', arrow labelled 95% H2SO4, Heat to A. Options are drawn structures with labelled atoms/groups as described (vertical bonds to CH3 / OH).
  1. (1)[drawn structure labelled CH3 above; CH3-CH=C-COOH]Official answer
  2. (2)[drawn structure labelled CH3-CH=C-CN with CH3 below]
  3. (3)[drawn structure labelled OH above; CH3-CH2-C-COOH; CH3 below]
  4. (4)[drawn structure labelled CH3-CH=C-CONH2 with CH3 below]

Official answer

Option 1

NTA final key.

Chapter
Aldehydes, Ketones and Carboxylic Acids
Topic
Nucleophilic Addition
Idea tested
Hydrolysis of Cyanohydrins

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 1 · Q79Which among the following aldehydes is most reactive towards nucleophilic addition reactions?EasySingle correctHas a figure
  5. 6 Apr 2024, Shift 2 · Q78Consider the given reaction, identify the major product P. CH3−COOH\mathrm{CH_3-COOH}…MediumSingle correct
  6. 30 Jan 2024, Shift 1 · Q90The compound formed by the reaction of ethanal with semicarbazide contains ________ number of nitrogen atoms.EasyNumerical value

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 108 of the 174 JEE Main shifts held from 2017 to 2026.