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Friday, 9 October

JEE Main 2026 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 2 April 2026, Shift 2, Chemistry Q68

Question 68 of 75 in this shift, Chemistry question 18 of 25, Section A.

Identify compounds A and E in the following reaction sequence. C_2H_5 \begin{array}[t]{c|c|c|c|c|c|c|c|c|c|c} & & Br_2 & Sn & NaNO_2/HCl & C_2H_5OH & (i) KMnO_4/KOH \\ \text{(- phenyl)} & A \xrightarrow[]{} B \xrightarrow[]{HCl} C \xrightarrow[]{273-278 K} D \xrightarrow[]{} E \\ NO_2 & & & & & & (ii) H_3O^+ \end{array}

The figure, in words

[figure: Shows chemical structure diagrams for options - benzene ring with substituents]
  1. (1)A=\begin{array}[t]{c} C_2H_5 \\ | \\ \end{array} E=\begin{array}[t]{c} COOH \\ | \\ \end{array}
  2. (2)A=\begin{array}[t]{c} C_2H_5 \\ | \\ \end{array} E=\begin{array}[t]{c} COOH \\ | \\ \end{array}Official answer
  3. (3)A=\begin{array}[t]{c} CH_2CH_2Br \\ | \\ \end{array} E=\begin{array}[t]{c} COOH \\ | \\ \end{array}
  4. (4)A=\begin{array}[t]{c} C_2H_5 \\ | \\ \end{array} E=\begin{array}[t]{c} COOH \\ | \\ \end{array}

Official answer

Option 2

NTA final key.

Chapter
Amines
Topic
Diazonium Salts
Idea tested
Replacement by H or OH

Same idea in other shifts

Asked 4× in all
  1. 8 Apr 2023, Shift 2 · Q76The product (P) formed from the following multistep reaction is: [reaction: 4-nitrotoluene (benzene ring with NO2\mathrm{NO_2} and…MediumDiagram basedHas a figure
  2. 13 Apr 2023, Shift 2 · Q78Compound A from the following reaction sequence is: A →0−5∘CBr2, CS2\xrightarrow[0-5^\circ\mathrm{C}]{\mathrm{Br_2,\ CS_2}} B…MediumSingle correctHas a figure
  3. 3 Aug 2021, Shift 2 · Q47A. →2) Heat1) NaNO2(aq.), HCl\xrightarrow[\text{2) Heat}]{\text{1) }\mathrm{NaNO_{2(aq.)}},\ \mathrm{HCl}} B.…EasySingle 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.