JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 26 February 2021, Shift 1, Chemistry Q44

Question 44 of 90 in this shift, Chemistry question 14 of 30, Section A.

\mathrm{A\ (C_4H_8Cl_2)} \xrightarrow[373\ \mathrm{K}]{\text{Hydrolysis}} \mathrm{B\ (C_4H_8O)}

B reacts with Hydroxyl amine but does not give Tollen’s test. Identify A and B.

(1)1,1-Dichlorobutane and Butanal
(2)2,2-Dichlorobutane and Butanal
(3)1,1-Dichlorobutane and 2-Butanone
(4)2,2-Dichlorobutane and Butan-2-oneOfficial answer

Official answer

Option 4

NTA final key.

Chapter: Aldehydes, Ketones and Carboxylic Acids
Topic: Nucleophilic Addition
Idea tested: Ammonia Derivative Addition

Same topic in other shifts

All Nucleophilic Addition questions

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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.