JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyMulti-step

JEE Main 25 February 2021, Shift 1, Chemistry Q45

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

The major product of the following chemical reaction is :

\mathrm{CH_3CH_2CN}

\xrightarrow[\text{3) Pd/BaSO}_4\text{, H}_2]{\text{1) H}_3\text{O}^+\text{, }\Delta\ \ \text{2) SOCl}_2}

(1) $\mathrm{CH_3CH_2CH_2OH}$
(2) $\mathrm{(CH_3CH_2CO)_2O}$
(3) $\mathrm{CH_3CH_2CH_3}$
(4) $\mathrm{CH_3CH_2CHO}$ Official answer

Official answer

Option 4

NTA final key.

Chapter: Aldehydes, Ketones and Carboxylic Acids
Topic: Carboxylic Acids and Derivatives
Idea tested: Rosenmund Reduction

Same idea in other shifts

Asked 6× in all

30 Jan 2024, Shift 1 · Q76[Reaction: benzoyl chloride (benzene ring bearing C(=O)Cl) $\xrightarrow{\mathrm{H_2,\ Pd-BaSO_4}}$ benzaldehyde (benzene ring bearing…EasySingle correctHas a figure
27 Jul 2022, Shift 2 · Q74Match **List - I** with **List - II**. List - I (A) $\mathrm{C_6H_5COCl}$ $\xrightarrow[\mathrm{Pd-BaSO_4}]{\mathrm{H_2}}$ …MediumMatch the listHas a figure
27 Jun 2022, Shift 1 · Q76Which of the following reactions will yield benzaldehyde as a product ? (A) [figure: benzene ring bearing COOH]…MediumOtherHas a figure
24 Feb 2021, Shift 2 · Q50Match List - I and List - II. List - I | List - II (a) $\mathrm{R-C(=O)-Cl \rightarrow R-CHO}$ | (i) $\mathrm{Br_2}$ /NaOH (b)…MediumMatch the listHas a figure
6 Sep 2020, Shift 2 · Q29The correct match between Item - I (starting material) and Item - II (reagent) for the preparation of benzaldehyde is : Item - I / Item -…EasyMatch the list

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.