JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumApplication

JEE Main 25 July 2021, Shift 1, Chemistry Q50

Question 50 of 90 in this shift, Chemistry question 20 of 30, Section A.

Which one of the following compounds will liberate

\mathrm{CO_2}

, when treated with

\mathrm{NaHCO_3}

(1) $\mathrm{CH_3-C(=O)-NH_2}$
(2) $\mathrm{CH_3NH_2}$
(3) $\mathrm{(CH_3)_4N^{\oplus}O^{\ominus}H}$
(4) $\mathrm{(CH_3)_3N^{\oplus}H\,Cl^{\ominus}}$ Official answer

Official answer

Option 4

NTA final key.

Chapter: Amines
Topic: Organic Acidity and Basicity
Idea tested: Sodium Bicarbonate Effervescence Test

Same idea in other shifts

Asked 3× in all

7 Apr 2025, Shift 1 · Q68Which of the following compounds is least likely to give effervescence of $\mathrm{CO_2}$ in presence of aq. $\mathrm{NaHCO_3}$ ?EasyDiagram basedHas a figure
8 Apr 2025, Shift 2 · Q61Match the LIST-I with LIST-II LIST-I (Reagent) | LIST-II (Functional Group detected) A. Sodium bicarbonate solution | I. double bond/…MediumMatch 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 42 of the 174 JEE Main shifts held from 2017 to 2026.