Karnataka 2nd PUC Chemistry Chapter 9 Important Questions 2027

The Karnataka 2nd PUC Chemistry Chapter 9 Important Questions 2027 help students revise Amines through multiple-choice questions (MCQs) based on the Karnataka Department of School Education (Pre-University) Chemistry CET material for 2026–27. 

The chapter covers classification, nomenclature, preparation, physical properties, chemical reactions, basic strength, and diazonium salts. Practising these questions can help students strengthen concepts and prepare for competitive examinations.

Karnataka 2nd PUC Chemistry Chapter 9 Important Questions

The following questions are taken from the Unit 09: Amines question bank. They include questions attributed to KCET, NEET, JEE Main, and other examinations.

1. Classification and Nomenclature of Amines

Q1. The total number of constitutional isomers having the molecular formula C₃H₉N is:
(KCET 2011)

a) Three
b) Four
c) Five
d) Two

Answer: b) Four

Q2. C₂H₇N represents:

a) Secondary amine
b) Tertiary amine
c) Both primary amine and secondary amine
d) Primary amine

Answer: c) Both primary amine and secondary amine

Q3. What is the IUPAC name of CH₃–CH(CH₃)–CH₂NH₂?
(NCERT Exemplar)

a) 2-Methylpropan-1-amine
b) 2-Methylethan-1-amine
c) Methylpropanamine
d) 2-Methylbutan-1-amine

Answer: a) 2-Methylpropan-1-amine

2. Methods of Preparation of Amines

Q4. n-Propylamine can be prepared by the catalytic reduction of:
(KCET 2011)

a) Propionaldoxime
b) Nitroethane
c) n-Propyl cyanide
d) Acetoxime

Answer: a) Propionaldoxime

Q5. The reagent used to convert CH₃CH₂C≡N into CH₃CH₂CH₂NH₂ can be:
(KCET 2017)

a) LiAlH₄
b) All of these
c) Na + C₂H₅OH
d) Ni/H₂

Answer: b) All of these

Q6. Hofmann rearrangement during the conversion of an amide to an amine is:

a) Intermolecular
b) Intramolecular
c) Both intermolecular and intramolecular
d) None of these

Answer: b) Intramolecular

Q7. When ethyl bromide reacts with excess alcoholic ammonia, the major product is:
(KCET 2015)

a) Ethylamine
b) Tetraethylammonium bromide
c) Diethylamine
d) Trimethylamine

Answer: a) Ethylamine

3. Physical Properties of Amines

Q8. Which amine does not form hydrogen bonding?
(KCET 2018)

a) All form hydrogen bonding
b) Tertiary amine
c) Secondary amine
d) Primary amine

Answer: b) Tertiary amine

Q9. Which of the following has the highest boiling point?
(KCET 2017)

a) Trimethylamine
b) Ethylmethylamine
c) Methylamine
d) Propan-1-amine

Answer: d) Propan-1-amine

4. Chemical Reactions and Basic Strength of Amines

Q10. Which of the following species are involved in the carbylamine test?
(KCET 2019)

(I) RNC
(II) CHCl₃
(III) COCl₂
(IV) NaNO₂ + HCl

a) (II) and (III) only
b) (II) and (IV) only
c) (I) and (IV) only
d) (I) and (II) only

Answer: d) (I) and (II) only

Q11. Benzylamine is a stronger base than aniline because:
(KCET 2016)

a) The lone pair on nitrogen in aniline is not involved in resonance
b) The lone pair on nitrogen in benzylamine is delocalised
c) The lone pair on nitrogen in aniline is delocalised
d) Benzylamine has a higher molecular mass than aniline

Answer: c) The lone pair on nitrogen in aniline is delocalised

Q12. Which of the following has the lowest pKₐ value?
Note: The supplied PDF asks for the lowest pKᵦ value.
(NEET 2020)

a) 2-Nitroaniline
b) Aniline
c) 4-Methoxyaniline
d) 4-Nitroaniline

Answer: c) 4-Methoxyaniline

Q13. Which of the following amines gives a positive carbylamine test?
(NEET 2018)

a) p-Methylbenzylamine
b) N,N-Dimethylaniline
c) Trimethylamine
d) N-Methylaniline

Answer: a) p-Methylbenzylamine

5. Diazonium Salts

Q14. The preparation of diazonium salts from primary amines is known as:

a) Benzoylation
b) Diazotisation
c) Acylation
d) Alkylation

Answer: b) Diazotisation

Q15. What is the most suitable temperature for the diazotisation reaction?
(KCET 2018)

a) 0°C
b) 10°C
c) 22°C
d) 30°C

Answer: a) 0°C

Q16. Sandmeyer reaction is used to convert:
(KCET 2018)

a) Chlorobenzene to phenol
b) Benzene to chlorobenzene
c) Aromatic aldehyde to aldol
d) Benzenediazonium chloride to cyanobenzene

Answer: d) Benzenediazonium chloride to cyanobenzene

Q17. Coupling of benzenediazonium chloride with phenol occurs in which medium, and with aniline in which medium?
(KCET 2019)

a) Basic, acidic
b) Neutral, basic
c) Acidic, basic
d) Acidic, neutral

Answer: a) Basic, acidic

Karnataka 2nd PUC Chemistry Chapter 9 PDF

The 2026–27 Chemistry CET Material contains a synopsis, chapter-wise MCQs, examination references, and an answer key for Unit 09: Amines. Students can use it for chapter revision and competitive-exam practice.

For additional preparation, refer to the Karnataka 2nd PUC syllabus, model papers, previous-year question papers, and exam pattern. Check the official board resources for the latest syllabus and examination updates.

How to Prepare Amines for Karnataka 2nd PUC Chemistry?

Students should begin by revising the classification and nomenclature of amines before moving to their preparation methods and chemical reactions. Practise writing reaction equations and identifying reagents, products, and reaction conditions.

Focus on the following topics from the supplied question bank:

• Classification and IUPAC nomenclature

• Reduction of nitro compounds, nitriles, and other suitable compounds

• Hofmann bromamide degradation

• Physical properties and hydrogen bonding

• Basic strength and pKᵦ comparisons

• Carbylamine and Hinsberg tests

• Reactions of aniline

• Preparation and reactions of diazonium salts

• Sandmeyer reactions and azo dye formation

After completing the questions, review the answer key in the supplied PDF and revisit the concepts behind incorrect answers. Students should also practise the remaining questions in the 75-question bank to cover the chapter more comprehensively.

Related sources - 

• Karnataka 2nd PUC Model Papers 2026-27

• Karnataka 2nd PUC Physics Important Questions 2026-27

• Karnataka 2nd PUC Maths Important Questions 2026-27

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