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Saturday, 31 October

JEE Main 2023 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 12 April 2023, Shift 1, Chemistry Q79

Question 79 of 90 in this shift, Chemistry question 19 of 30, Section A.

The incorrect statement regarding the reaction given below is [figure: 'A' = N,N-dimethylaniline (benzene ring bearing N(Me)Me\mathrm{N(Me)Me}) +NaNO2+HX⟶+ \mathrm{NaNO_2 + HX} \longrightarrow 'B']

The figure, in words

Compound 'A': benzene ring with an N(Me)Me group (N,N-dimethylaniline) + NaNO2 + HX gives 'B'.
  1. (1)The product 'B' formed in the above reaction is p-nitroso compound at low temperature
  2. (2)The reaction occurs at low temperature
  3. (3)The electrophile involved in the reaction is NO+\mathrm{NO^+}
  4. (4)'B' is N-nitroso ammonium compoundOfficial answer

Official answer

Option 4

NTA final key.

Chapter
Amines
Topic
Diazonium Salts
Idea tested
Reaction of Tertiary Aryl Amines with HNO2

Same topic in other shifts

All Diazonium Salts questions
  1. 2 Apr 2026, Shift 2 · Q68Identify compounds A and E in the following reaction sequence.…MediumSingle correctHas a figure
  2. 4 Apr 2026, Shift 1 · Q67Product C of the following reaction sequence will be aniline →Br2/water\xrightarrow{\mathrm{Br_2/water}} A (Major Product)…MediumDiagram basedHas a figure
  3. 6 Apr 2026, Shift 1 · Q72Consider the following sequence of reactions. [C6H5−N=N−NH−C6H5\mathrm{C_6H_5-N=N-NH-C_6H_5}]…MediumNumerical valueHas a figure
  4. 6 Apr 2026, Shift 2 · Q67Consider the following organic reaction sequence. Choose the final product (X) from the following (consider the major product in all…HardSingle correctHas a figure
  5. 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
  6. 3 Apr 2025, Shift 1 · Q66Identify [A], [B] and [C], respectively in the following reaction sequence: [A] --(NaNO2_2, HCl, 273 - 278 K)--> benzenediazonium…EasyDiagram 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.