JEE Main 2022 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 25 June 2022, Shift 1, Chemistry Q78

Question 78 of 90 in this shift, Chemistry question 18 of 30, Section A.

The reaction of

\mathrm{R-C(=O)-NH_2}

with bromine and KOH gives

\mathrm{RNH_2}

as the end product. Which one of the following is the intermediate product formed in this reaction ?

(1) $\mathrm{R-C(=O)-NH-Br}$
(2) $\mathrm{R-NH-Br}$
(3) $\mathrm{R-N=C=O}$ Official answer
(4) $\mathrm{R-C(=O)-NBr_2}$

Official answer

Option 3

NTA final key.

Chapter: Amines
Topic: Amines
Idea tested: Hofmann Bromamide Degradation

Same idea in other shifts

Asked 11× in all

5 Apr 2026, Shift 2 · Q67Given below are two statements : Statement I : Heating benzamide with bromine in an ethanolic solution of sodium hydroxide will give…MediumTwo statements
8 Apr 2026, Shift 2 · Q68Which statements are True ? A. In Hoffmann bromamide degradation, 4 moles of NaOH and 2 moles of $\mathrm{Br_2}$ are consumed per mole of…MediumOther
30 Jan 2024, Shift 1 · Q77The final product A, formed in the following multistep reaction sequence is : [Scheme: bromobenzene…MediumDiagram basedHas a figure
6 Apr 2023, Shift 1 · Q76The major product formed in the following reaction is [Reactant: benzene ring bearing ortho $\mathrm{CH_2CONH_2}$ and $\mathrm{COOCH_3}$ …HardDiagram basedHas a figure
29 Jul 2022, Shift 1 · Q76[figure: 'A' ( $\mathrm{C_8H_6Cl_2O}$ ) $\xrightarrow{\mathrm{NH_3}}$ $\mathrm{C_8H_8ClNO}$ $\xrightarrow[\mathrm{NaOH}]{\mathrm{Br_2}}$ a…HardDiagram basedHas a figure
30 Jul 2022, Shift 2 · Q46Which one of the following compounds can be prepared in good yield by Hoffmann bromamide degradation reaction?EasyDiagram basedHas a figure
27 Jun 2022, Shift 1 · Q77Given below are two statements : Statement - I : In Hofmann degradation reaction, the migration of only an alkyl group takes place from…MediumTwo statements
27 Aug 2021, Shift 1 · Q46The major product of the following reaction is : $\mathrm{CH_3-CH-CH_2-CH_2-C(=O)-Cl}$ [CH3 drawn above the CH, O drawn above the C]…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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.