Fundamentals of Organic ChemistryChemistryAmines
Benzamide and benzylamine can be distinguished by:
Options
- Aboth cold dilute NaOH and cold dilute HCl
- Bcold dilute HCl
- Ccold dilute NaOH
- DNaNO ₂ and HCl at 0^ C , followed by -naphthol
Correct answer
B. cold dilute HCl
Step-by-step solution
Benzamide ( PhCONH₂ ) is a neutral compound and does not dissolve in cold dilute HCl or cold dilute NaOH . Benzylamine ( PhCH₂NH₂ ) is a primary aliphatic amine and is basic in nature. It reacts with cold dilute HCl to form a water-soluble salt, benzylammonium chloride. PhCH₂NH₂ + HCl PhCH₂NH₃^+Cl^- (soluble) Since benzylamine dissolves in cold dilute HCl while benzamide does not, cold dilute HCl can be used to distinguish between them. Answer: cold dilute HCl