1. Which of the following amines is primary?
Answer:
Explanation:
Aniline has one alkyl/aryl group attached to the nitrogen, making it a primary amine.
2. The functional group of amines is:
Answer:
Explanation:
Amines contain the -NH2 functional group.
3. Which of the following reactions distinguishes primary, secondary, and tertiary amines?
Answer:
Explanation:
Hinsberg's test can differentiate between primary, secondary, and tertiary amines based on their reactivity with benzene sulfonyl chloride.
4. Amines react with nitrous acid to form:
Answer:
Explanation:
Primary aromatic amines react with nitrous acid to produce diazonium salts.
5. Which of the following is a secondary amine?
Answer:
Explanation:
Diethylamine has two alkyl groups attached to the nitrogen atom, making it a secondary amine.
6. Which of the following amines is aromatic in nature?
Answer:
Explanation:
Aniline has a benzene ring and is thus an aromatic amine.
7. The correct IUPAC name for (CH3)2NH is:
Answer:
Explanation:
It has two methyl groups attached to the nitrogen.
8. Amines can be prepared from halides by:
Answer:
Explanation:
Alkyl halides react with ammonia in a nucleophilic substitution reaction to produce amines.
9. Which amine gives a foul smell on reaction with chloroform and alcoholic KOH?
Answer:
Explanation:
Primary amines react with chloroform and alcoholic KOH to produce isocyanides, which have a foul smell.
10. Gabriel phthalimide synthesis is used for the preparation of:
Answer:
Explanation:
Gabriel phthalimide synthesis is a method for the preparation of primary amines.
11. Which of the following is a heterocyclic amine?
Answer:
Explanation:
Pyridine is a heterocyclic compound with a nitrogen atom in the ring.
12. The reaction of amines with carbylamine gives:
Answer:
Explanation:
Primary amines react with chloroform in the presence of a base to give isocyanides.
13. Which amine can form a salt with hydrochloric acid?
Answer:
Explanation:
All amines can react with acids to form ammonium salts.
14. Which of the following amines can undergo acylation?
Answer:
Explanation:
Primary and secondary amines can undergo acylation to form amides.
15. Diazonium salts are usually stable at:
Answer:
Explanation:
Diazonium salts are generally stable at low temperatures and decompose at higher temperatures.
16. Aniline on nitration gives:
Answer:
Explanation:
Aniline on nitration majorly gives p-nitroaniline and o-nitroaniline.
17. Amines have a ______ smell.
Answer:
Explanation:
Amines generally have a characteristic fishy odor.
18. Which of the following compounds will not react with nitrous acid?
Answer:
Explanation:
Trimethylamine is a tertiary amine and does not react with nitrous acid.
19. Aniline on oxidation gives:
Answer:
Explanation:
Aniline on oxidation produces benzoic acid.
20. Which of the following amines will form a water-soluble salt with hydrochloric acid?
Answer:
Explanation:
All the given amines can react with HCl to form water-soluble ammonium salts.