JEE Main 2020 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 8 January 2020, Shift 2, Chemistry Q50

Question 50 of 75 in this shift, Chemistry question 25 of 25, Section B.

In the following sequence of reactions the maximum number of atoms present in molecule 'C' in one plane is __________.

\mathrm{A\ \xrightarrow[Cu\ tube]{Red\ hot}\ B\ \xrightarrow[Anhydrous\ AlCl_3]{CH_3Cl\ (1.\ eq.)}\ C}

(A is a lowest molecular weight alkyne)

Official answer

13.00 to 13.00

NTA final key (Jan 2020). Any value in the range scored.

Chapter: Hydrocarbons
Topic: Aromatic Hydrocarbons
Idea tested: Friedel-Crafts Alkylation

Same idea in other shifts

Asked 7× in all

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
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
10 Apr 2023, Shift 2 · Q74The major product 'P' formed in the given reaction is:HardDiagram basedHas a figure
29 Jun 2022, Shift 2 · Q74[figure: six-membered ring drawn with alternating double bonds] + $\mathrm{CH_3CH_2CH_2Cl}$ → 'A' Major Product (reagent over the arrow:…MediumDiagram basedHas a figure
25 Feb 2021, Shift 2 · Q42The major product of the following reaction is : [figure: benzene ring (circle inside hexagon), then an arrow with a skeletal reagent…MediumDiagram basedHas a figure
4 Sep 2020, Shift 2 · Q45The major product [C] of the following reaction sequence will be :…HardDiagram 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.