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JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 16 March 2021, Shift 2, Chemistry Q47

Question 47 of 90 in this shift, Chemistry question 17 of 30, Section A.

Which of the following is least basic ?

(1) $\mathrm{(CH_3CO)_2\ddot{N}H}$ Official answer
(2) $\mathrm{(C_2H_5)_2\ddot{N}H}$
(3) $\mathrm{(CH_3CO)\ddot{N}HC_2H_5}$
(4) $\mathrm{(C_2H_5)_3\ddot{N}}$

Official answer

Option 1

NTA final key.

Chapter: Amines
Topic: Amines
Idea tested: Basicity of Amides vs Amines

Same idea in other shifts

Asked 2× in all

4 Apr 2025, Shift 2 · Q69The correct order of basicity for the following molecules is : [figure: (P) N-methylpiperidin-2-one; (Q)…HardDiagram basedHas 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 42 of the 174 JEE Main shifts held from 2017 to 2026.