NEET UG · Chemistry · Amines

Amines and Diazonium Salts: NEET previous year questions

18 questions in ten years of NEET, in 10 of 10 papers. Pattern: Every year. Here is how it is asked and which ideas come back.

Asked in 10 years: 18; about 1.7 per paper
Years asked: 10/10; last asked 2026
Chance of a question next paper: 84%; historical rate, how we compute it
Weighted estimate: 2.0; model; history: 1.7 a paper on average, typically 1–2

Key findings

01
Asked in 10 of 10 papers, 18 questions in all: #18 of 204 topics by ten-year total.
02
94% of its questions since 2018 tested an idea never asked before; none repeated an idea from the year before.
03
The most repeated idea is Gabriel and Hoffmann Synthesis, asked 2 times (2017, 2024), usually as “identify end product of reaction sequence”.
04
NEET has asked 16 of the 77 ideas in this topic; 52 have never been asked, directly or indirectly.
05
Mostly asked as one-line MCQ (72%); 39% easy, 0% hard, and up from 1.5 to 2.3 questions a paper since 2024.

Questions per year

Up to 2023: 1.5; per paper
Since 2024: 2.3; +0.8
Usual gap: 1.0 yrs; between papers asking it
Swing: ±0.6; questions, year to year

Recent framings

statement I/II on substituent effects
identify reactions giving a given product
statement I/II on diazonium salts

Revise first

Substituent Effects on Aniline Basicity (2026); Reduction Methods for Amine Synthesis (2026); Basicity Trends in Amines (2025)

How it is asked

Difficulty, format and skill

Across all 18 questions on Amines and Diazonium Salts since 2017.

Difficulty

QUESTIONS

711

Easy7 · 39%
Medium11 · 61%
Hard0 · 0%

Format

One-line MCQ · 13 Q72%
Two statements · 4 Q22%
Other · 1 Q6%

Skill tested

Concept · 6 Q33%
Application · 4 Q22%
Multi-step · 4 Q22%
Recall · 4 Q22%

Repeats

New idea, or one asked before?

Each column is a paper. Blue questions tested an idea NEET had not asked before; navy ones went back to an idea from an earlier paper. 2017 is the first paper, so everything in it counts as new.

’17’18’19’20’21’22’23’24’25’26

Idea asked for the first time
Idea asked in an earlier paper

Coverage of the topic

NEET has asked 16 of the 77 ideas in this topic. 52 have never been asked yet.

16952

Asked directly16 · 21%
Touched inside another question9 · 12%
Never asked52 · 68%

Ideas come from Lumi’s syllabus map of NCERT. A never-asked idea is not a safe skip: most new questions come from exactly these.

Drill down

Idea, year, question

Every idea NEET tested in this topic, with its ten papers. Open one to read the questions.

ideaAskedShareYears’17’18’19’20’21’22’23’24’25’26

Repeated2 · 11%11%2/10
- 2024 · Q99
  Identify the major product C formed in the following reaction sequence : CH $_3$ -CH $_2$ -CH $_2$ -I $\xrightarrow{\mathrm{NaCN}}$ A…
  mediumOne-line MCQ
- 2017 · Q87
  Which of the following reactions is appropriate for converting [illegible]e ?
  easyOne-line MCQNew idea
2 · 11%11%1/102
Repeated2 · 11%11%2/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10
1 · 6%6%1/10

Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.

Ideas

Every idea inside this topic

16 different ideas were tested; 2 came more than once. Basicity Trends in Amines is the foundation for 14 other ideas in the syllabus.

Gabriel and Hoffmann Synthesis2×
identify end product of reaction sequence
One-line MCQ · 6% next · foundation for 6
Reaction with Nitrous Acid2×
statement i/ii on amine reactions
One-line MCQ · 6% next · foundation for 3
Reduction Methods for Amine Synthesis1×
identify reactions giving a given product
Other · 6% next · foundation for 2
Substituent Effects on Aniline Basicity1×
statement i/ii on substituent effects
Two statements · 6% next
Basicity Trends in Amines1×
order/ranking of property
One-line MCQ · 6% next · foundation for 14
Mendius Reduction Reaction1×
identify end product of reaction sequence
One-line MCQ · 6% next
Synthesis of Iodobenzene from Diazonium1×
statement i/ii on diazonium salts
Two statements · 6% next
Friedel-Crafts Anomaly in Aniline1×
statement i/ii on amines
Two statements · 6% next
Diazonium Replacement Reactions1×
identify end product of reaction sequence
One-line MCQ · 4% next · foundation for 7
Reduction Products of Cyanides and Isocyanides1×
identify reaction that does not give product
One-line MCQ · 4% next
Alkali Solubility in the Hinsberg Test1×
identify compound giving test
One-line MCQ · 4% next
Deamination via Diazonium Reduction1×
reagent identification
One-line MCQ · 4% next
Hinsberg and Carbylamine Tests1×
identify compound giving test
One-line MCQ · 4% next · foundation for 6
Aqueous Basicity Order of Methylamines1×
order/ranking of property
One-line MCQ · 4% next · foundation for 1
Direct Nitration Anomaly of Aniline1×
reason for observed reaction outcome
One-line MCQ · 4% next
Substituent Effects on Aniline Basicity1×
order/ranking of property
One-line MCQ · 4% next

Idea	Times	Format	Chance next	Foundation for
Gabriel and Hoffmann Synthesisidentify end product of reaction sequence	2	One-line MCQMulti-step	6%	6 ideas
Reaction with Nitrous Acidstatement i/ii on amine reactions	2	One-line MCQMulti-step	6%	3 ideas
Reduction Methods for Amine Synthesisidentify reactions giving a given product	1	OtherApplication	6%	2 ideas
Substituent Effects on Aniline Basicitystatement i/ii on substituent effects	1	Two statementsConcept	6%	–
Basicity Trends in Aminesorder/ranking of property	1	One-line MCQConcept	6%	14 ideas
Mendius Reduction Reactionidentify end product of reaction sequence	1	One-line MCQMulti-step	6%	–
Synthesis of Iodobenzene from Diazoniumstatement i/ii on diazonium salts	1	Two statementsRecall	6%	–
Friedel-Crafts Anomaly in Anilinestatement i/ii on amines	1	Two statementsConcept	6%	–
Diazonium Replacement Reactionsidentify end product of reaction sequence	1	One-line MCQMulti-step	4%	7 ideas
Reduction Products of Cyanides and Isocyanidesidentify reaction that does not give product	1	One-line MCQApplication	4%	–
Alkali Solubility in the Hinsberg Testidentify compound giving test	1	One-line MCQApplication	4%	–
Deamination via Diazonium Reductionreagent identification	1	One-line MCQRecall	4%	–
Hinsberg and Carbylamine Testsidentify compound giving test	1	One-line MCQApplication	4%	6 ideas
Aqueous Basicity Order of Methylaminesorder/ranking of property	1	One-line MCQConcept	4%	1 ideas
Direct Nitration Anomaly of Anilinereason for observed reaction outcome	1	One-line MCQConcept	4%	–
Substituent Effects on Aniline Basicityorder/ranking of property	1	One-line MCQConcept	4%	–

Chance next is the historical rate at which an idea with this record came back in the following paper. It is low for every idea, which is why learning the topic beats memorising past questions. All repeated ideas

Every question

Amines and Diazonium Salts questions, year by year

The opening words of each question as it appeared in the official paper, with the idea it tested.

NEET 20262 questions

Q79
Identify the reactions which give aniline as the major product. A. $\mathrm{C_6H_5CN}$ $\xrightarrow{\text{LiAlH}_4}$ B.…
Idea: Reduction Methods for Amine Synthesis
New ideaMediumOther · figure
Q84
Given below are two statements: Statement-I : Oxidation of p-nitrotoluene with acidic $\mathrm{KMnO_4}$ gives an acid that is stronger…
Idea: Substituent Effects on Aniline Basicity
New ideaMediumTwo statements

NEET 20253 questions

Q49
Predict the major product 'P' in the following sequence of reactions - 1-Methylcyclopentene…
Idea: Mendius Reduction Reaction
New ideaMediumOne-line MCQ · figure
Q67
The correct order of decreasing basic strength of the given amines is :
Idea: Basicity Trends in Amines
New ideaMediumOne-line MCQ
Q74
Given below are two statements : Statement I : Benzenediazonium salt is prepared by the reaction of aniline with nitrous acid at 273 - 278…
Idea: Synthesis of Iodobenzene from Diazonium
New ideaMediumTwo statements

NEET 20242 questions

Q77
Given below are two statements: Statement I : Aniline does not undergo Friedel-Crafts alkylation reaction. Statement II : Aniline cannot…
Idea: Friedel-Crafts Anomaly in Aniline
New ideaEasyTwo statements
Q99
Identify the major product C formed in the following reaction sequence : CH $_3$ -CH $_2$ -CH $_2$ -I $\xrightarrow{\mathrm{NaCN}}$ A…
Idea: Gabriel and Hoffmann Synthesis
MediumOne-line MCQ

NEET 20232 questions

Q52
Identify the product in the following reaction : Benzenediazonium chloride ( $\mathrm{C_6H_5N_2^+Cl^-}$ )…
Idea: Diazonium Replacement Reactions
New ideaMediumOne-line MCQ · figure
Q85
Which of the following reactions will NOT give primary amine as the product?
Idea: Reduction Products of Cyanides and Isocyanides
New ideaMediumOne-line MCQ

NEET 20222 questions

Q63
Given below are two statements : Statement I : Primary aliphatic amines react with $\mathrm{HNO_2}$ to give unstable diazonium salts.…
Idea: Reaction with Nitrous Acid
New ideaEasyTwo statements
Q95
The product formed from the following reaction sequence is [structure: benzonitrile, $\mathrm{C_6H_5CN}$ ]…
Idea: Reaction with Nitrous Acid
New ideaMediumOne-line MCQ · figure

NEET 20212 questions

Q84
Identify the compound that will react with Hinsberg's reagent to give a solid which dissolves in alkali.
Idea: Alkali Solubility in the Hinsberg Test
New ideaEasyOne-line MCQ · figure
Q93
The reagent 'R' in the given sequence of chemical reaction is : 2,4,6-Tribromoaniline $\mathrm{\xrightarrow{NaNO_2,\ HCl,\ 0-5^{\circ}C}}$ …
Idea: Deamination via Diazonium Reduction
New ideaMediumOne-line MCQ · figure

NEET 20201 question

Q102
Which of the following amine will give the carbylamine test ?
Idea: Hinsberg and Carbylamine Tests
New ideaEasyOne-line MCQ · figure

NEET 20191 question

Q90
The correct order of the basic strength of methyl substituted amines in aqueous solution is :
Idea: Aqueous Basicity Order of Methylamines
New ideaMediumOne-line MCQ

NEET 20181 question

Q55
Nitration of aniline in strong acidic medium also gives m-nitroaniline because
Idea: Direct Nitration Anomaly of Aniline
New ideaEasyOne-line MCQ

NEET 20172 questions

Q64
The correct increasing order of basic strength for the following compounds is : (I) aniline ( $\mathrm{C_6H_5NH_2}$ ) (II) p-nitroaniline…
Idea: Substituent Effects on Aniline Basicity
EasyOne-line MCQ · figure
Q87
Which of the following reactions is appropriate for converting [illegible]e ?
Idea: Gabriel and Hoffmann Synthesis
EasyOne-line MCQ

Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.