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Saturday, 31 October

JEE Main 2024 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 6 April 2024, Shift 1, Chemistry Q88

Question 88 of 90 in this shift, Chemistry question 28 of 30, Section B.

The major product of the following reaction is P. CH3C=C−CH3\mathrm{CH_3C = C - CH_3} →273 K(i) Na/liq. NH3 (ii) dil. KMnO4\xrightarrow[\text{273 K}]{\text{(i) Na/liq. NH}_3\ \text{(ii) dil. KMnO}_4} 'P' Number of oxygen atoms present in product 'P' is __________. (nearest integer)

The figure, in words

Reaction scheme: CH3C=C-CH3 (central bond printed as '=') with arrow, conditions (i) Na/liq. NH3, (ii) dil. KMnO4, 273 K, giving 'P'.

Official answer

2

NTA final key.

Chapter
Hydrocarbons
Topic
Alkenes and Alkynes
Idea tested
Stereoselective Alkyne Reduction

Same idea in other shifts

Asked 4× in all
  1. 4 Apr 2026, Shift 2 · Q64Compound (X) is subjected to the sequence of reactions as shown above. Molar mass of the major product (Y) formed is ________…MediumDiagram basedHas a figure
  2. 1 Feb 2024, Shift 2 · Q75In the given reactions identify A and B H2+A→Pd/C\mathrm{H_2 + A \xrightarrow{Pd/C}} [figure: alkene with CH3\mathrm{CH_3} (upper left) and…EasyOtherHas a figure
  3. 4 Aug 2021, Shift 1 · Q43Select the most suitable reagent for the following reduction reactionEasySingle 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 108 of the 174 JEE Main shifts held from 2017 to 2026.