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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceDiagram basedMediumMulti-step

JEE Main 25 July 2021, Shift 2, Chemistry Q47

Question 47 of 90 in this shift, Chemistry question 17 of 30, Section A.

[reaction scheme] C6H5NO2\mathrm{C_6H_5NO_2} with reagent Sn + HCl gives "A"; "A" with reagent C6H5N2⊕Cl⊖\mathrm{C_6H_5\overset{\oplus}{N_2}\overset{\ominus}{Cl}} / H⊕\mathrm{H^{\oplus}} gives P (Yellow coloured Compound) Consider the above reaction, the Product "P" is :

The figure, in words

Each option is a drawn structure containing two benzene rings.
  1. (1)[figure: a benzene ring joined to N=N, which is joined to a second benzene ring bearing NH2_2 at the vertex opposite the N=N attachment]Official answer
  2. (2)[figure: a benzene ring joined to N=N, which is joined to N bearing H, which is joined to a second benzene ring]
  3. (3)[figure: a benzene ring joined to N=N, which is joined to a second benzene ring bearing NH2_2 at the vertex adjacent to the N=N attachment]
  4. (4)[figure: a benzene ring joined to N bearing H, which is joined to a second benzene ring]

Official answer

Option 1

NTA final key.

Chapter
Amines

Same idea in other shifts

Asked 11× in all
  1. 2 Apr 2025, Shift 2 · Q69When a concentrated solution of sulphanilic acid and 1-naphthylamine is treated with nitrous acid (273 K) and acidified with acetic acid,…MediumSingle correct
  2. 6 Apr 2024, Shift 1 · Q909.3 g of pure aniline upon diazotisation followed by coupling with phenol gives an orange dye. The mass of orange dye produced (assume…MediumNumerical value
  3. 30 Jan 2024, Shift 1 · Q80Following is a confirmatory test for aromatic primary amines. Identify reagent (A) and (B). [Scheme: aniline (C6H5NH2\mathrm{C_6H_5NH_2})…EasyDiagram basedHas a figure
  4. 30 Jan 2024, Shift 2 · Q79The products A and B formed in the following reaction scheme are respectively Benzene…EasyDiagram basedHas a figure
  5. 31 Jan 2024, Shift 2 · Q80The azo-dye (Y) formed in the following reactions is Sulphanilic acid + NaNO2\mathrm{NaNO_2} + CH3COOH\mathrm{CH_3COOH} →\rightarrow X. X +…MediumDiagram basedHas a figure
  6. 15 Apr 2023, Shift 1 · Q77Consider the following sequence of reactions: [figure: aniline (C6H5NH2\mathrm{C_6H_5NH_2})…EasyDiagram basedHas a figure
  7. 29 Jul 2022, Shift 1 · Q77[figure: benzenediazonium chloride (benzene ring bearing N+≡NCl−\mathrm{N^{+}\equiv NCl^{-}}) + 'A' →NaOH\xrightarrow{\mathrm{NaOH}} Product…EasyDiagram basedHas a figure
  8. 3 Aug 2021, Shift 1 · Q46Sulphanilic acid on diazotisation and then reaction with N,N–dimethylaniline gives which of the following? Mark if their common name is…MediumDiagram 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. 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.