Amines are regarded as the derivatives of ammonia (NH3) in which an alkyl or an aryl group replaces one, two or all three hydrogen atoms. Amines are classified as primary (1°), secondary (2°) or tertiary (3°) according to one, two or three hydrogen atoms of ammonia molecules are replaced by alkyl or aryl groups in ammonia molecule. If one hydrogen atom of ammonia is replaced by alkyl (R) or aryl group (Ar), we get RNH2, or ArNH2, a primary (1°) amine. If two hydrogen atoms of ammonia or one hydrogen atom of RNH2 is replaced by another alkyl (R) or aryl (Ar) group, we get R-NH-R’, which is a 2° amine. The second alkyl or aryl group may be the same or different. Replacement of all the three hydrogen atoms of ammonia or another hydrogen atom of R-NH-R’ by alkyl (R”) or aryl group gives R-NR’R”, which is a 3° amine (R” may be the same or different than R or R’).
Download Class 12 Chemistry Worksheet on Chapter 13 Amines Set 4 PDF.
CBSE Class 12 Chemistry Chapter 13 Amines Worksheet – Set 4
Q1. Which of the following compound is expected to be the most basic?
(a) Methyl amine
(b) Ethyl amine
(c ) Hydroxyl amine
(d) None of the above
Q2. Primary, secondary and tertiary nitroalkanes can be identified by the action of
(a) Nitrous acid and Aqueous sodium hydroxide
(b) Chloroform and Aqueous sodium hydroxide
(c ) Chloroform and Alcoholic potassium hydroxide
(d) None of the above
Q3. Alkyl nitrite on reduction with Sn and hydrochloric acid gives
(a) Alcohol
(b) Hydroxyl amine
(c ) Both (a) and (b)
(d) None of the above
Q4. What happens when urea is heated with ethanal?
(a) Urethane is formed
(b) Urea alcohol is formed
(c ) Ureide is formed
(d) None of the above
Q5. Which of the following is least basic?
(a) Ammonia
(b) Methyl amine
(c ) Dimethyl amine
(d) None of the above
Q6. What is the IUPAC name of the compound mentioned below?
Q7. Draw the structure of N- Ethyl-4- Isopropyl-N-methyl aniline.
Q8. Why does the electrophilic substitution of aromatic amines occur more readily than benzene?
Q9. Why does silver chloride dissolve in methyl amine solution?
Q10. Why does the reactivity of NH2 get reduced in acetanilide?
Q11. Arrange the set in order of their basic strength in an aqueous solution.
NH3, C6H5NH2, CH3NH2, (CH3)3N, (CH3)2NH
Q12. Account for the following order of increasing basicity.
Nitrile < Imine < Amine
Q13. Suggest a structural formula of a compound having molecular formula C8H11N (A), which is optically active and dissolves in dilute aqueous hydrogen iodide and releases nitrogen gas with nitrous acid.
Q14. Identify A, B, C, D, and E in the below-mentioned reaction.
Q15. Answer the following questions.
(a) How will you convert an alkyl halide into a primary amine with one or more carbon atoms than the alkyl halide?
(b) How can a carboxylic acid be converted into an amine having one less carbon atom than the carboxylic acid?
Q16. Complete the following reaction.
(i) 
Q17. What happens when benzene diazonium chloride reacts with
(a) Ethanol
(b) Hypo phosphorous acid
Q18. Answer the following questions.
(a) Arrange the following compound in increasing order of their boiling point.
C2H5NH2, C2H5OH, (CH3)3N
(b) Arrange the following compound in increasing order of their pKb values.
C6H5NH2, C2H5NH2, C6H5NHCH3
(c ) Arrange the following compound in increasing order of their basic strength.
C2H5NH2, C6H5NH2, NH3, C6H5CH2NH2, and (C2H5)2NH
Q19. Convert the following.
(a) Benzene to N, N- dimethyl aniline.
(b) Cl- (CH2)6– Cl to Hexan-1,6- diamine
Q20. Complete the following acid-base reaction and name the product formed.
(a) CH3CH2CH2NH2 + HCl →
(b) (C2H5)3N + HCl →
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Read Also:
- 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.
