JEE Main 2024 · ChemistryNumerical answerNumerical valueEasyApplication

JEE Main 30 January 2024, Shift 1, Chemistry Q90

Question 90 of 90 in this shift, Chemistry question 30 of 30, Section B.

The compound formed by the reaction of ethanal with semicarbazide contains ________ number of nitrogen atoms.

Official answer

NTA final key.

Chapter: Aldehydes, Ketones and Carboxylic Acids
Topic: Nucleophilic Addition
Idea tested: Regioselectivity in Semicarbazide

Same topic in other shifts

All Nucleophilic Addition questions

2 Apr 2026, Shift 2 · Q67A molecule (X) with following structure under mild acidic condition is hydrolysed to produce (Y) and (Z). Identify the correct statements…MediumSingle correct
5 Apr 2026, Shift 2 · Q66Given below are two statements : Statement I : The condensation reaction between $\mathrm{CH_3-CH=O}$ and $\mathrm{H_2N-NH-C(=O)-NH_2}$ …MediumTwo statements
7 Apr 2025, Shift 2 · Q68"P" is an optically active compound with molecular formula $\mathrm{C_6H_{12}O}$ . When 'P' is treated with 2, 4-dinitrophenylhydrazine, it…MediumDiagram basedHas a figure
6 Apr 2024, Shift 1 · Q79Which among the following aldehydes is most reactive towards nucleophilic addition reactions?EasySingle correctHas a figure
6 Apr 2024, Shift 2 · Q78Consider the given reaction, identify the major product P. $\mathrm{CH_3-COOH}$ …MediumSingle correct
31 Jan 2024, Shift 1 · Q89The product of the following reaction is P. 4-Hydroxybenzaldehyde, (i) PhMgBr (1 equiv.), (ii) aq. $\mathrm{NH_4Cl}$ , gives P The number…MediumNumerical valueHas 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.