What does Amines cover for NEET Chemistry?

6 lessons: Amine Basic Character, Amine Identification, Amine Preparation, Amines Nomenclature, Amines Structure and Diazonium Salts.

How often has Amines come up in NEET past papers?

Our set of verified past papers has 11 questions from this unit, from NEET 2020, 2021, 2022, 2023, 2024, 2025 and 2026. Each is answered against the official NTA key.

Is the Amines material free?

Yes. All 6 lessons and 48 practice questions are free, with no login needed.

Amines

6 lessons

Topic index in NCERT order

6 of 6 lessons by the NCERT chapter they teach from, in book order. The page is the first printed page of your NCERT book the lesson cites; PYQs are the past NEET questions on that topic.

Class 12 Chemistry, Chapter 9

Amines Structurep. 2590 PYQs
Amines Nomenclaturep. 2600 PYQs
Amine Preparationp. 2624 PYQs
Amine Basic Characterp. 2682 PYQs
Amine Identificationp. 2712 PYQs
Diazonium Saltsp. 2743 PYQs

Amine Basic Character

8 MCQs2 PYQs4 revision cardsWorked example

Easy Recall (3)Direct Application (3)Concept Trap (1)Calculation (1)

Amine Identification

8 MCQs2 PYQsWorked example

Easy Recall (3)Direct Application (3)Concept Trap (1)Calculation (1)

Amine Preparation

8 MCQs4 PYQsWorked example

Easy Recall (3)Direct Application (3)Calculation (1)Concept Trap (1)

Amines Nomenclature

8 MCQsWorked example

Easy Recall (3)Direct Application (3)Concept Trap (1)Calculation (1)

Amines Structure

8 MCQsWorked example

Easy Recall (3)Direct Application (3)Concept Trap (2)

Diazonium Salts

8 MCQs3 PYQsWorked example

Easy Recall (3)Direct Application (3)Concept Trap (1)Calculation (1)

Past-paper questions from this unit

11 questions from NEET 2020, 2021, 2022, 2023, 2024, 2025, 2026. Answers verified against NTA official keys.

By year in our set: 2020 (1) · 2021 (2) · 2022 (1) · 2023 (1) · 2024 (2) · 2025 (2) · 2026 (2)

Lesson: Amine Preparation

NEET 2026

Identify the reactions which give aniline as the major product. A. Benzonitrile (C₆H₅CN) with LiAlH₄. B. Benzamide (C₆H₅CONH₂) with KOH and Br₂. C. Nitrobenzene (C₆H₅NO₂) with NaBH₄. D. Acetanilide (C₆H₅NHCOCH₃) with HCl, H₂O and heat. Choose the correct answer from the options given below.

1A and B only

2B and D only

3A and C only

4C and D only

NTA Answer: Option 2(final)

Report an error · Every fix is public: corrections log

Lesson: Amine Basic Character

NEET 2026

Given below are two statements: Statement-I : Oxidation of p-nitrotoluene with acidic KMnO₄ gives an acid that is stronger than benzoic acid. Statement-II : Reduction of p-nitrotoluene with Sn/HCl followed by neutralization gives an amine that is more basic than aniline. In light of the above statements, choose the most appropriate answer from the options given below.

1Both Statement-I and Statement-II are correct.

2Both Statement-I and Statement-II are incorrect.

3Statement-I is correct but Statement-II is incorrect.

4Statement-I is incorrect but Statement-II is correct.

NTA Answer: Option 1(final)

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Lesson: Amine Basic Character

NEET 2025

The correct order of decreasing basic strength of the given amines is:

1benzenamine > ethanamine > N-methylaniline > N-ethylethanamine

2N-methylaniline > benzenamine > ethanamine > N-ethylethanamine

3N-ethylethanamine > ethanamine > benzenamine > N-methylaniline

4N-ethylethanamine > ethanamine > N-methylaniline > benzenamine

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Lesson: Diazonium Salts

NEET 2025

Given below are two statements : Statement-I : Benzenediazonium salt is prepared by the reaction of aniline with nitrous acid at 273 – 278 K. It decomposes easily in the dry state. Statement-II : Insertion of iodine into the benzene ring is difficult and hence iodobenzene is prepared through the reaction of benzenediazonium salt with KI. In the light of the above statements, choose the most appropriate answer from the options given below :

1Statement I is incorrect but Statement II is correct

2Both Statement I and Statement II are correct

3Both Statement I and Statement II are incorrect

4Statement I is correct but Statement II is incorrect

NTA Answer: Option 2(final)

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Lesson: Amine Preparation

NEET 2024Revised key

Given below are two statements: Statement I : Aniline does not undergo Friedel-Crafts alkylation reaction. Statement II : Aniline cannot be prepared through Gabriel synthesis . In the light of the above statements, choose the correct answer from the options given below:

1Both statement I and Statement II are true

2Both Statement I and Statement II are false

3Statement I is correct but Statement II is false

4Statement I is incorrect but Statement II is true

NTA Answer: Option 1(revised_final)

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Lesson: Amine Preparation

NEET 2024Revised key

Identify the major product C formed in the following reaction sequence: CH₃ − CH₂ − CH₂ − I —[NaCN]→ A —[OH⁻ / Partial hydrolysis]→ B —[NaOH, Br₂]→ C (major)

1propylamine

2butylamine

3butanamide

4α–bromobutanoic acid

NTA Answer: Option 1(revised_final)

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Lesson: Amine Preparation

NEET 2023

Which of the following reactions will NOT give primary amine as the product?

1CH₃CN —[(i) LiAlH₄ (ii) H₃O⊕]→ Product

2CH₃NC —[(i) LiAlH₄ (ii) H₃O⊕]→ Product

3CH₃CONH₂ —[(i) LiAlH₄ (ii) H₃O⊕]→ Product

4CH₃CONH₂ —[Br₂/KOH]→ Product

NTA Answer: Option 2(final)

Report an error · Every fix is public: corrections log

Lesson: Diazonium Salts

NEET 2022

Given below are two statements Statement I: Primary aliphatic amines react with HNO2 to give unstable diazonium salts. Statement II: Primary aromatic amines react with HNO2 to form diazonium salts which are stable even above 300 K. In the light of the above statements, choose the most appropriate answer from the options given below

1Statement I is incorrect but Statement II is correct.

2Both Statement I and Statement II are correct.

3Both Statement I and Statement II are incorrect.

4Statement I is correct but Statement II is incorrect.

NTA Answer: Option 4(final)

Report an error · Every fix is public: corrections log

Lesson: Amine Identification

NEET 2021

Identify the compound that will react with Hinsberg's reagent to give a solid which dissolves in alkali.

1CH₃–CH₂–N(CH₃)–CH₂–CH₃

2CH₃–CH₂–NO₂

3CH₃–CH₂–NH–CH₃

4CH₃–CH₂–NH₂

NTA Answer: Option 4(final)

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Lesson: Diazonium Salts

NEET 2021

The reagent 'R' in the given sequence of chemical reaction is: 2,4,6-tribromoaniline —[NaNO₂, HCl, 0–5 °C]→ 2,4,6-tribromobenzenediazonium chloride (ArN₂⁺Cl⁻) —[R]→ 1,3,5-tribromobenzene

1CuCN/KCN

2H₂O

3CH₃CH₂OH

4HI

NTA Answer: Option 3(final)

Report an error · Every fix is public: corrections log

Lesson: Amine Identification

NEET 2020

Which of the following amine will give the carbylamine test ?

1C6H5NHC2H5 (N-ethylaniline)

2C6H5NH2 (aniline)

3C6H5NHCH3 (N-methylaniline)

4C6H5N(CH3)2 (N,N-dimethylaniline)

NTA Answer: Option 2(final)

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Exam traps and common mistakes in this unit

Lesson: Amine Basic Character

Trap

Aromatic amines weaker base than aliphatic

Category: Inorganic Exception

Student treats aniline as stronger base than methylamine. Aniline weaker due to lone-pair delocalization into ring.

When it triggers

Basicity ordering across aromatic and aliphatic amines.

How to avoid

Aliphatic amines (CH3NH2) > NH3 > aromatic amines (C6H5NH2). Aniline lone pair delocalised into ring → less available for protonation.

Lesson: Amine Preparation

Trap

Carbon count through an amine preparation

Category: Organic Reaction Conditions

Student keeps the carbon count unchanged across Hoffmann bromamide degradation (or across nitrile reduction), so picks the amide-length amine, or the aromatic amine from a nitrile.

When it triggers

An amide with Br2/NaOH (or KOH), or a nitrile with LiAlH4, and options that differ by one carbon.

How to avoid

Hoffmann bromamide: the amine has one carbon LESS than the amide (the group migrates from the carbonyl carbon to N). Nitrile reduction: the amine keeps the nitrile carbon, one carbon MORE than the amine series it ascends from, so C6H5CN gives C6H5CH2NH2, not aniline. NCERT Class 12 Chemistry Ch 9, PDF pp. 5-7.

Lesson: Amines Nomenclature

Trap

Hofmann vs Saytzeff product selectivity

Category: Organic Reaction Conditions

Quaternary ammonium hydroxide (Hofmann) elimination favours LESS substituted alkene (anti-Saytzeff). Halide elimination (E2) follows Saytzeff (more substituted).

When it triggers

E2 elimination question with quaternary ammonium hydroxide vs alkyl halide.

How to avoid

Hofmann: bulky leaving group + base → least substituted alkene (Hofmann product). Saytzeff: alkyl halide + base → most substituted alkene (Zaitsev product).

Lesson: Amine Basic Character

Mistake

Uses gas-phase basicity order in aqueous solution.

Root cause: concept gap

Correction

Gas phase: 3° > 2° > 1° > NH₃. Aqueous: 2° > 1° > 3° > NH₃ (steric + solvation effects).

Lesson: Amine Basic Character

Mistake

Predicts aniline as stronger base than methylamine.

Root cause: concept gap

Correction

Aniline's lone pair delocalised into ring → less basic. Order: aliphatic (CH3NH2) > NH3 > aromatic (PhNH2).

Lesson: Amine Preparation

Mistake

Proposes Gabriel phthalimide synthesis to make aniline or another aromatic primary amine.

Root cause: concept gap

Correction

Gabriel synthesis needs an SN2 attack of the phthalimide anion on the halide; aryl halides do not undergo that substitution, so aromatic primary amines cannot be made this way (NCERT Class 12 Chemistry Ch 9, PDF p. 6). Make aniline by reducing nitrobenzene (Fe scrap + HCl) or by Hoffmann degradation of benzamide.

Lesson: Amine Preparation

Mistake

Treats ammonolysis of an alkyl halide as a clean route to a single primary amine.

Root cause: concept gap

Correction

The primary amine formed is itself a nucleophile, so ammonolysis gives a mixture of 1°, 2° and 3° amines and the quaternary ammonium salt; a large excess of ammonia makes the primary amine the major product (NCERT Class 12 Chemistry Ch 9, PDF pp. 4-5).

Lesson: Amine Preparation

Mistake

Keeps the carbon count unchanged through Hoffmann bromamide degradation or nitrile reduction.

Root cause: concept gap

Correction

Hoffmann bromamide: amine = amide minus one carbon (butanamide gives propanamine; benzamide gives aniline). Nitrile reduction keeps every carbon, so C6H5CN gives benzylamine C6H5CH2NH2, not aniline (NCERT Class 12 Chemistry Ch 9, PDF pp. 5-7).

Lesson: Amines Nomenclature

Mistake

Picks Saytzeff product for Hofmann elimination.

Root cause: concept gap

Correction

Hofmann (quaternary R₄N⁺ + OH⁻): least substituted alkene. Saytzeff (alkyl halide + base): most substituted.

Lesson: Diazonium Salts

Mistake

Confuses Sandmeyer (CuX) with Gattermann (Cu/HX) reagents.

Root cause: concept gap

Correction

Sandmeyer: ArN₂⁺ + CuCl/CuBr/CuCN → ArCl/ArBr/ArCN. Gattermann: Cu powder + HX. Hydrolysis: H₂O → ArOH.

Formulas in this unit

Lesson: Amine Basic Character

pKb of common amines (aqueous)

pK_{b}^{amine}

Aqueous basicity order: 2° ≈ 1° > 3° > NH3. Aromatic amines much weaker due to resonance delocalisation of lone pair.

Symbol	Quantity	SI Unit
pKb	-log Kb	-

Valid when

Aqueous solution; gas-phase order is 3°>2°>1°

NEET question patterns in this unit

Lesson: Amine Basic Character

Order amines by basicity. Aliphatic > NH3 > aromatic. Steric and solvation effects in aqueous medium.

InterpretationMedium

Common distractors

uses gas phase order in aqueous

Doesn't account for solvation reversal

Lesson: Amine Preparation

Given reagents or a short sequence (nitrile, amide, nitro compound, halide), decide which routes give a primary (or aromatic) amine and track the carbon count: Hoffmann bromamide removes one carbon, nitrile reduction keeps it, Gabriel fails for aryl halides.

InterpretationMedium

Common distractors

keeps carbon count through hoffmann

Amide and amine look like the same chain

gabriel for aniline

Gabriel is 'the' primary-amine synthesis

Lesson: Diazonium Salts

Predict product of diazonium reactions: Sandmeyer (CuX), hydrolysis (H2O), coupling (phenol/aniline).

RecallMedium

Common distractors

confuses sandmeyer gattermann

Mixes up Cu reagents

Questions about this unit

What does Amines cover for NEET Chemistry?: 6 lessons: Amine Basic Character, Amine Identification, Amine Preparation, Amines Nomenclature, Amines Structure and Diazonium Salts.
How often has Amines come up in NEET past papers?: Our set of verified past papers has 11 questions from this unit, from NEET 2020, 2021, 2022, 2023, 2024, 2025 and 2026. Each is answered against the official NTA key.
Is the Amines material free?: Yes. All 6 lessons and 48 practice questions are free, with no login needed.