JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 18 March 2021, Shift 2, Chemistry Q45

Question 45 of 90 in this shift, Chemistry question 15 of 30, Section A.

In the reaction of hypobromite with amide, the carbonyl carbon is lost as :

(1)CO
(2) $\mathrm{CO_2}$
(3) $\mathrm{CO_3^{2-}}$ Official answer
(4) $\mathrm{HCO_3^-}$

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
25 Jun 2022, Shift 1 · Q78The 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…EasySingle correct
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

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.