Amines are an important class of organic compounds. They occur widely throughout both plants and animals. They are found among proteins, vitamins, alkaloids, hormones etc. Amines are regarded as the derivatives of ammonia (NH3), in which an alkyl replaces hydrogen atoms. It can be primarily classified into three classes. A primary amine incorporates an alkyl group directly attached to the central nitrogen atom. A secondary amine holds two alkyl groups directly attached to the central nitrogen atom. A tertiary amine possesses three alkyl groups directly attached to the central nitrogen atom.
Download Class 12 Chemistry Worksheet on Chapter 13 Amines Set 5 PDF
CBSE Class 12 Chemistry Chapter 13 Amines Worksheet – Set 5
Q1. Which of the following is least basic?
(a) C6H5NH2
(b) C2H5NH2
(c ) (C2H5)2NH
(d) None of the above
Q2. We can distinguish primary aliphatic or aromatic amines from secondary and tertiary amines by reacting with
(a) Chloroform and alcoholic potassium hydroxide
(b) Methyl iodide
(c ) Chloroform only
(d) None of the above
Q3. Which of the following will give a primary amine on hydrolysis?
(a) Nitro paraffin
(b) Alkyl cyanide
(c ) Alkyl isocyanate
(d) None of the above
Q4. The reaction of a primary amine with aldehyde gives
(a) Amide
(b) Aldimine
(c ) Nitrile
(d) None of the above
Q5. Ethyl amine undergoes oxidation in the presence of potassium per magnet followed by hydrolysis to form
(a) An acid
(b) An alcohol
(c ) An aldehyde
(d) None of the above
Q6. What is the IUPAC name of the compound mentioned below?
C6H5-CH2-CH2-NHCH3
Q7. Draw the structure of p-tertiary butyl aniline.
Q8. Why does tertiary amine not undergo acylation?
Q9. Arrange the following sets in order of their basic strength in an aqueous solution.
Aniline, p- nitro aniline, p- methyl aniline
Q10. Why do amines react as a nucleophile?
Q11. The presence of a base is needed in the ammonolysis of alkyl halide. Justify your answer.
Q12. Name the following reactions.
(a) C6H5N2+ Cl – + CuCl + HCl → C6H5Cl + N2
(b) C6H5N2+ Cl – + Cu + HCl → C6H5Cl + N2 + CuCl
Q13. Write the chemical reaction of aniline with benzoyl chloride and the name of the product formed.
Q14. Write the structure of different isomers corresponding to the molecular formula C3H9N. Write IUPAC names of the isomers, which will liberate nitrogen gas on treatment with nitrous acid.
Q15. How can you prepare a pure sample of 1º amine from 1º alkyl halide?
Q16. Identify A, B, C, D, E, and F in the following reaction.
Q17. Explain
(a) Ammonolysis
(b) Coupling reaction
Q18. Answer the following questions.
(a) Write the chemical reaction of C6H5NH2 + C6H5COCl and name the product obtained.
(b) Convert the following.
(i) 3-methyl aniline to 3-nitro toluene
(ii) Aniline to 1, 3, 5-tri Bromo benzene
Q19. A compound ‘A’ having molecular formula C3H7ON reacts with Br2 in the presence of NaOH to give compound ‘B’. This compound ‘B’ reacts with HNO2 to form alcohol and N2 gas. Identify compounds ‘A’ and ‘B’ and write the reaction involved.
Q20. Write a short note on the following.
(a) Carbylamine reaction
(b) Diazotization
(c ) Hoffmann’s bromide reaction
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Read Also:
- Amine
- Chemical Reactions of Amines – Acylation and Basicity
- Amines Questions
- Classification and Nomenclature of Amines
- Amines
- Physical Properties of Amines with Characteristics
- Chemical Reactions of Amines – Electrophilic Substitution
- Class 12 Chemistry Chapter 13 Amines MCQs
- Important Questions for Class 12 Chemistry Chapter 13 – Amines.
