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Friday, 9 October

JEE Main 2026 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 6 April 2026, Shift 2, Chemistry Q64

Question 64 of 75 in this shift, Chemistry question 14 of 25, Section A.

'xx' is the product which is obtained by the hydrolysis of prop-1-yne in the presence of mercuric sulphate under dilute acidic medium at 333 K. 'yy' is the product which is obtained by the reaction of ethane nitrile with methyl magnesium bromide in dry ether followed by hydrolysis. IUPAC name of product obtained from 'xx' and 'yy' in the presence of barium hydroxide followed by heating is :
  1. (1)2 - Methylpent-4-en-3-one
  2. (2)4 - Methylpent-3-en-2-oneOfficial answer
  3. (3)4 - Methylpent-1-ene
  4. (4)2 - Methylpent-3-one

Official answer

Option 2

NTA final key.

Chapter
Aldehydes, Ketones and Carboxylic Acids
Topic
Aldol and Cannizzaro
Idea tested
Self-Aldol Condensation

Same topic in other shifts

All Aldol and Cannizzaro questions
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  2. 2 Apr 2025, Shift 1 · Q68Given below are two statements : Statement (I) : Vanillin ([structure: benzene ring with -CHO, -OH para to CHO and -OCH3 ortho to OH])…MediumTwo statementsHas a figure
  3. 3 Apr 2025, Shift 2 · Q68The major product (P) in the following reaction is : Ph−CO−CHO\mathrm{Ph{-}CO{-}CHO} →ΔKOH\xrightarrow[\Delta]{\mathrm{KOH}} P (Major Product)MediumDiagram basedHas a figure
  4. 8 Apr 2025, Shift 2 · Q68When [structure: CH3C(=O)CH2CH2CH2CH2CHO\mathrm{CH_3C(=O)CH_2CH_2CH_2CH_2CHO}, a skeletal zigzag chain with a methyl ketone at one end and an aldehyde (C=O…MediumSingle correctHas a figure
  5. 30 Jan 2024, Shift 2 · Q78m-chlorobenzaldehyde on treatment with 50% KOH solution yieldsEasyDiagram basedHas a figure
  6. 25 Jul 2021, Shift 1 · Q44[figure: 3,3-dimethylcyclopentanone (ketone C=O, gem-dimethyl on adjacent ring carbon) reacts with CH3CHO\mathrm{CH_3CHO}, NaOH to give 'P'…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.