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Reactions of amines: acylation, carbylamine, Hinsberg test

37 questions on Reactions of amines: acylation, carbylamine, Hinsberg test from the Amines and Aromatic Nitrogen Compounds chapter: 7 NEET level, 15 JEE Main, 15 JEE Advanced. Each one opens with its answer and solution.

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Which of the following gives a positive carbylamine test? NEET level
Aniline reacts with acetic anhydride, (CH3CO)2O, in the presence of pyridine to give: NEET level
The Hinsberg reagent is: NEET level
An amine reacts with benzenesulfonyl chloride in aqueous KOH to give a solid that does not dissolve in excess alkali. The amine is: JEE Main level
Aniline is treated with (CH3CO)2O, then with Br2 in ethanoic acid, and the product is hydrolysed with aqueous acid. The major final organic product is: JEE Main level
When aniline is heated with CHCl3 and ethanolic KOH, the foul-smelling product is: JEE Main level
Ethanamine is treated with NaNO2 and dilute HCl at 273-278 K. The observation and main organic product are: JEE Main level
Aniline is shaken with benzoyl chloride, C6H5COCl, and aqueous NaOH (Schotten-Baumann conditions). The product is: JEE Main level
Which of the following does NOT react with acetic anhydride to give an acyl derivative? JEE Main level
N-Methylaniline is treated with NaNO2 and dilute HCl at 273-278 K. The product is: JEE Main level
Which of the following give a positive carbylamine test? JEE Main level
Compound A, C7H9N, gives a positive carbylamine test. On treatment with NaNO2/HCl at 273-278 K, then CuCN/KCN, then hydrolysis with aqueous acid, and finally vi... JEE Advanced level
An amine of formula C3H9N gives a solid with benzenesulfonyl chloride and aqueous KOH that does not dissolve in excess alkali, and gives a yellow oil with NaNO2... JEE Advanced level
Which sequence is the most suitable for converting aniline into 4-nitroaniline as the major product? JEE Advanced level
H2NCH2CH2NHCH3 is treated with excess (CH3CO)2O (one acetyl group enters on each nitrogen bearing N-H, and the amides formed are not acylated further). The prod... JEE Advanced level
Which statements about the action of nitrous acid (NaNO2/HCl) on amines are correct? JEE Advanced level
Which statements about the Hinsberg test are correct? JEE Advanced level
Aniline is treated successively with: (i) (CH3CO)2O, (ii) Br2 in ethanoic acid, (iii) aqueous HCl and heat, (iv) NaNO2/HCl at 273-278 K, (v) H3PO2. The final ma... JEE Advanced level
Assertion (A): Aniline gives a positive carbylamine test, but N-methylaniline does not. Reason (R): Isocyanide formation requires a nitrogen bearing two hydroge... JEE Advanced level
Which of the following gives the carbylamine test (foul-smelling isocyanide with CHCl3 + KOH)? NEET level
The Hinsberg reagent is NEET level
Aniline reacts with acetic anhydride in the presence of pyridine to give NEET level
When a tertiary aliphatic amine such as (CH3CH2)3N is shaken with benzenesulfonyl chloride and aqueous alkali, it NEET level
Ethylamine is treated with NaNO2 and dil. HCl at 273-278 K. According to the standard textbook description of this reaction, the main products are JEE Main level
Dimethylamine is treated with NaNO2 / dil. HCl at low temperature. The product is JEE Main level
Direct bromination of aniline with bromine water gives 2,4,6-tribromoaniline, but aniline can be converted into mainly 4-bromoaniline by first making acetanilid... JEE Main level
An amine reacts with benzenesulfonyl chloride and the product is insoluble in aqueous KOH. The amine is JEE Main level
In the carbylamine reaction of a primary amine with CHCl3 and ethanolic KOH, the reactive electrophilic species generated from chloroform is JEE Main level
Primary amines of formula C5H13N give a sulfonamide that dissolves in aqueous alkali when treated with benzenesulfonyl chloride (Hinsberg test). Counting consti... JEE Main level
Methylamine is treated with excess acetyl chloride in the presence of pyridine. The product is JEE Main level
An aromatic amine A (C7H9N) gives a positive carbylamine test and a stable diazonium salt at 273-278 K. On treatment with excess bromine water A gives a tribrom... JEE Advanced level
Aniline is treated in sequence with (i) (CH3CO)2O / pyridine, (ii) one equivalent of Br2 in acetic acid (major product), (iii) acid hydrolysis, (iv) NaNO2 / dil... JEE Advanced level
Assertion: Aniline does not undergo Friedel-Crafts alkylation with CH3Cl and anhydrous AlCl3. Reason: The nitrogen lone pair of aniline forms a salt-like comple... JEE Advanced level
Which of the following give a positive carbylamine test (foul-smelling isocyanide)? JEE Advanced level
Which statements about the Hinsberg test (benzenesulfonyl chloride, then aqueous alkali) are correct? JEE Advanced level
Which of the following correctly describe the reaction of amines with nitrous acid (NaNO2 / dil. HCl)? JEE Advanced level
With acetyl chloride in the presence of pyridine, which of the following amines readily form an amide? JEE Advanced level