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Friday, 9 October

JEE Main 2026 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 4 April 2026, Shift 1, Chemistry Q72

Question 72 of 75 in this shift, Chemistry question 22 of 25, Section B.

Consider the following sequence of reactions to give the major product (X) benzene →(i) CH3Cl/anhydrous AlCl3; (ii) Cl2/FeCl3; (iii) K2Cr2O7/H2SO4\xrightarrow{\text{(i) } \mathrm{CH_3Cl}/\text{anhydrous } \mathrm{AlCl_3};\ \text{(ii) } \mathrm{Cl_2/FeCl_3};\ \text{(iii) } \mathrm{K_2Cr_2O_7/H_2SO_4}} (X) Major Product PP g of the major product (X) formed is reacted with NaHCO3\mathrm{NaHCO_3} solution to liberate a gas which occupied 11.2 dm311.2\ \mathrm{dm^3} at STP. P=P= ______ g. (Given molar mass in g mol−1\mathrm{g\ mol^{-1}} H:1, C:12, O:16, Cl:35.5)

The figure, in words

Benzene ring on the left of a reaction arrow with reagents (i) CH3Cl\mathrm{CH_3Cl}/anhydrous AlCl3\mathrm{AlCl_3}, (ii) Cl2/FeCl3\mathrm{Cl_2/FeCl_3}, (iii) K2Cr2O7/H2SO4\mathrm{K_2Cr_2O_7/H_2SO_4} giving (X) Major Product.

Official answer

78

NTA final key.

Chapter
Haloalkanes and Haloarenes
Topic
Aromatic Hydrocarbons
Idea tested
Side-chain Oxidation

Same topic in other shifts

All Aromatic Hydrocarbons questions
  1. 2 Apr 2026, Shift 1 · Q66For the given molecule, "xx", the preferred site for the attack of the electrophile is :MediumDiagram basedHas a figure
  2. 4 Apr 2026, Shift 2 · Q56Match the LIST-I with LIST-II List-I (Reaction): A. Williamson Synthesis B. Friedel Craft Reaction C. Bromination of vinyl benzene D.…EasyMatch the list
  3. 5 Apr 2026, Shift 1 · Q65For the following Friedel Craft's alkylation reaction, which of the statements are correct? [figure: benzene + n-propyl chloride…MediumOtherHas a figure
  4. 8 Apr 2026, Shift 2 · Q64The total number of aromatic compounds/species from the following is [figures: p-benzoquinone; tropylium cation (cycloheptatrienyl…MediumOtherHas a figure
  5. 8 Apr 2026, Shift 2 · Q72'xx' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous…MediumNumerical value
  6. 2 Apr 2025, Shift 1 · Q65Designate whether each of the following compounds is aromatic or not aromatic.MediumSingle 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 42 of the 174 JEE Main shifts held from 2017 to 2026.