Class 12 Chemistry MCQ Chapter 9 Amines English Medium
Master your board exam preparation with our Class 12 Chemistry MCQ Chapter 9 Amines English Medium study resource. This article features a well-curated collection of multiple-choice questions (MCQs) and answers designed specifically for AHSEC Higher Secondary students.
Amines is a crucial chapter in Organic Chemistry that explores the classification, nomenclature, preparation, physical properties, and chemical reactions of amines. Students will encounter important concepts such as basicity of amines, diazonium salts, aromatic amines, aliphatic amines, and various name reactions that are frequently tested in examinations. These MCQs help reinforce theoretical knowledge while improving problem-solving and analytical skills.
All questions are prepared in accordance with the latest AHSEC syllabus and exam pattern. Regular practice will help students identify important topics, improve time management, and gain confidence in answering objective-type questions during examinations.
Whether you are preparing for class tests, mock tests, or the AHSEC Higher Secondary Final Examination, these Chapter 9 MCQ solutions will provide valuable support for effective revision and academic success.
Part II
Class 12 Chemistry MCQ Chapter 9 Amines
VSA & MCQ
I. Short Question-Answers
Q. What are amines?
Ans: Organic compounds derived from ammonia by replacement of one or more hydrogen atoms by alkyl or aryl groups.
Q. What is general formula of amines?
Ans: R–NH₂, R₂NH, R₃N
Q. What are primary amines?
Ans: Amines with one alkyl/aryl group attached to nitrogen.
Q. What are secondary amines?
Ans: Amines with two alkyl/aryl groups attached to nitrogen.
Q. What are tertiary amines?
Ans: Amines with three alkyl/aryl groups attached to nitrogen.
Q. What are aromatic amines?
Ans: Amines in which nitrogen is attached to an aromatic ring.
Q. What is basicity of amines?
Ans: Ability to donate lone pair of electrons.
Q. Why amines are basic?
Ans: Due to presence of lone pair on nitrogen.
Q. Order of basicity in aqueous solution.
Ans: 2° > 1° > 3°
Q. What is aniline?
Ans: C₆H₅NH₂
Q. What is ammonolysis?
Ans: Reaction of alkyl halide with ammonia.
Q. What is Gabriel phthalimide synthesis?
Ans: Method to prepare primary amines.
Q. What is Hoffmann bromamide reaction?
Ans: Conversion of amide to amine with one carbon less.
Q. Write Hoffmann reaction.
Ans: RCONH₂ + Br₂ + 4NaOH → RNH₂ + Na₂CO₃ + 2NaBr + 2H₂O
Q. What is diazotisation?
Ans: Conversion of primary aromatic amine to diazonium salt.
Q. What is diazonium salt?
Ans: Compound containing –N₂⁺ group.
Q. What is coupling reaction?
Ans: Reaction of diazonium salt with phenol or amine.
Q. What is carbylamine test?
Ans: Test for primary amines producing foul smelling isocyanide.
Q. What is Hinsberg test?
Ans: Test to distinguish primary, secondary, tertiary amines.
Q. Why aniline is less basic?
Ans: Lone pair is involved in resonance.
Q. What is alkylation of amines?
Ans: Introduction of alkyl group.
Q. What is acylation?
Ans: Introduction of acyl group.
Q. What is quaternary ammonium salt?
Ans: R₄N⁺X⁻
Q. What is nitro reduction?
Ans: Conversion of nitro compound to amine.
Q. What is aromatic amine stability?
Ans: Stabilized by resonance.
Q. What is solubility of amines?
Ans: Lower amines are soluble in water.
Q. What is hydrogen bonding in amines?
Ans: Interaction due to N–H bond.
Q. What is structure of amines?
Ans: Trigonal pyramidal.
Q. What is hybridisation of nitrogen?
Ans: sp³
Q. What is steric hindrance?
Ans: Hindrance due to bulky groups.
II. Multiple Choice Questions (MCQs)
Q. Amines are derivatives of:
(a) NH₃
(b) H₂O
(c) CO₂
(d) CH₄
Ans: (a)
Q. Primary amine is:
(a) RNH₂
(b) R₂NH
(c) R₃N
(d) R₄N⁺
Ans: (a)
Q. Secondary amine is:
(a) RNH₂
(b) R₂NH
(c) R₃N
(d) R₄N⁺
Ans: (b)
Q. Tertiary amine is:
(a) RNH₂
(b) R₂NH
(c) R₃N
(d) R₄N⁺
Ans: (c)
Q. Aniline is:
(a) Aliphatic amine
(b) Aromatic amine
(c) Alcohol
(d) Acid
Ans: (b)
Q. Basicity due to:
(a) Lone pair
(b) Charge
(c) Bond
(d) Mass
Ans: (a)
Q. Most basic in aqueous solution:
(a) 1°
(b) 2°
(c) 3°
(d) NH₃
Ans: (b)
Q. Hoffmann reaction reduces:
(a) Acid
(b) Amide
(c) Alcohol
(d) Ester
Ans: (b)
Q. Diazotisation forms:
(a) Alcohol
(b) Salt
(c) Diazonium salt
(d) Acid
Ans: (c)
Q. Carbylamine test is for:
(a) 1° amine
(b) 2° amine
(c) 3° amine
(d) Acid
Ans: (a)
Q. Hinsberg test distinguishes:
(a) Alcohols
(b) Amines
(c) Acids
(d) Alkanes
Ans: (b)
Q. Hybridisation of N in amines:
(a) sp
(b) sp²
(c) sp³
(d) dsp²
Ans: (c)
Q. Structure of amines:
(a) Linear
(b) Planar
(c) Pyramidal
(d) Tetrahedral
Ans: (c)
Q. Assertion: Amines are basic.
Reason: Presence of lone pair on nitrogen.
(a) Both true, R correct explanation
(b) Both true, R not correct explanation
(c) A true, R false
(d) A false, R true
Ans: (b)
Q. Assertion: Aniline is less basic.
Reason: Lone pair participates in resonance.
(a) Both true, R correct explanation
(b) Both true, R not correct explanation
(c) A true, R false
(d) A false, R true
Ans: (d)
Q. Assertion: Primary amines give carbylamine test.
Reason: Formation of isocyanide.
(a) Both true, R correct explanation
(b) Both true, R not correct explanation
(c) A true, R false
(d) A false, R true
Ans: (c)
Q. Assertion: Diazotisation occurs at low temperature.
Reason: Diazonium salts are unstable.
(a) Both true, R correct explanation
(b) Both true, R not correct explanation
(c) A true, R false
(d) A false, R true
Ans: (a)
Q. Assertion: Amines form hydrogen bonds.
Reason: Presence of N–H bond.
(a) Both true, R correct explanation
(b) Both true, R not correct explanation
(c) A true, R false
(d) A false, R true
Ans: (b)
Q. Assertion: Secondary amines are more basic.
Reason: Alkyl groups increase electron density.
(a) Both true, R correct explanation
(b) Both true, R not correct explanation
(c) A true, R false
(d) A false, R true
Ans: (d)
Q. Assertion: Tertiary amines are less basic in water.
Reason: Steric hindrance reduces solvation.
(a) Both true, R correct explanation
(b) Both true, R not correct explanation
(c) A true, R false
(d) A false, R true
Ans: (c)
