Which of the following does not form a salt with dilute HCl?
Tertiary amines like (CH₃CH₂)₃N form salts with HCl due to the lone pair on nitrogen. However, CH₃CONH₂ (an amide) is not basic enough to form a salt, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Chemical Reactions - Alkylation, Acylation and Electrophilic Substitution