NEET UG 2019 · Chemistry · 45 questions

NEET 2019 Chemistry, question by question

The NEET 2019 Chemistry section had 45 questions from 30 chapters: 19 easy, 24 medium and 2 hard. 42% were easy, 4 points below the 2017–2026 average for Chemistry, and 24 (53%) came from Class 12. The p-Block Elements (Class 12) had the most, 5 questions.

Updated 2026-10-08

Questions: 45; 25% of the paper
Chapters asked: 30; 0 usual chapters skipped
Easy: 42%; 2017–2026 average 47%
From Class 12: 53%; 2017–2026 average 54%

The section

What Chemistry asked in 2019

Class balance, difficulty and the form of the questions. Bars below compare Chemistry across every paper from 2017–2026.

Class 11 and 12

2124

Class 11
Class 12

Difficulty

1924

Easy
Medium
Hard

New ideas: 41 (91%)
Use a figure: 7

Question pattern

CHEMISTRY 2019

Concept27%
Recall24%
Application20%
Calculation18%
Figure-based7%
Match the lists4%

Chapters

The 2019 Chemistry chapter split

All 30 Chemistry chapters asked, and which got more or less than usual: the chapter’s ten-year average per 180 questions.

Every chapter asked

The p-Block Elements (Class 12)5 · usually 2.2
Equilibrium3 · usually 2.5
Thermodynamics3 · usually 3.1
Alcohols, Phenols and Ethers2 · usually 1.4
Chemical Kinetics2 · usually 2.0
Electrochemistry2 · usually 1.6
Hydrocarbons2 · usually 2.4
Solutions2 · usually 1.6
Structure of Atom2 · usually 1.5
The p-Block Elements (Class 11)2 · usually 1.3
The s-Block Elements2 · usually 1.1
Aldehydes, Ketones and Carboxylic Acids1 · usually 2.6
Amines1 · usually 1.7
Biomolecules1 · usually 1.4
Chemical Bonding and Molecular Structure1 · usually 2.3
Chemistry in Everyday Life1 · usually 0.6
Classification of Elements and Periodicity in Properties1 · usually 1.3
Coordination Compounds1 · usually 2.6
Environmental Chemistry1 · usually 0.6
General Principles and Processes of Isolation of Elements1 · usually 0.8
Haloalkanes and Haloarenes1 · usually 1.5
Hydrogen1 · usually 0.6
Organic Chemistry - Some Basic Principles and Techniques1 · usually 2.1
Polymers1 · usually 0.6
Redox Reactions1 · usually 1.0
Some Basic Concepts of Chemistry1 · usually 1.3
States of Matter1 · usually 0.9
Surface Chemistry1 · usually 0.8
The d- and f-Block Elements1 · usually 2.0
The Solid State1 · usually 0.9

More than usual

The p-Block Elements (Class 12)+2.85 questions · usually 2.2
The s-Block Elements+0.92 questions · usually 1.1
The p-Block Elements (Class 11)+0.72 questions · usually 1.3
Alcohols, Phenols and Ethers+0.62 questions · usually 1.4
Equilibrium+0.53 questions · usually 2.5
Structure of Atom+0.52 questions · usually 1.5
Solutions+0.52 questions · usually 1.6
Chemistry in Everyday Life+0.41 question · usually 0.6

Less than usual, or skipped

Coordination Compounds−1.61 question · usually 2.6
Aldehydes, Ketones and Carboxylic Acids−1.61 question · usually 2.6
Chemical Bonding and Molecular Structure−1.31 question · usually 2.3
Organic Chemistry - Some Basic Principles and Techniques−1.11 question · usually 2.1
The d- and f-Block Elements−1.01 question · usually 2.0
Amines−0.71 question · usually 1.7
Haloalkanes and Haloarenes−0.51 question · usually 1.5
Hydrocarbons−0.42 questions · usually 2.4

Every question

All 45 Chemistry questions of NEET 2019

Open any question for the full text, the options and the official answer. “New idea” means no earlier paper had tested it.

Subject

Difficulty

Idea

Find

45 of 45 questions

Chemistry45 questions

19 easy24 medium2 hard

Q46
The number of sigma (σ) and pi (π) bonds in pent-2-en-4-yne is :
Organic Chemistry - Some Basic Principles and Techniques Organic Nomenclature Hybridisation and Sigma/Pi Bonds in Organic Molecules
EasyOne-line MCQIdea asked in 2 papersAsked the year before
Q47
The structure of intermediate A in the following reaction, is : C₆H₅–CH(CH₃)₂ (cumene) $\xrightarrow{O_2}$ A $\xrightarrow{H^+, H_2O}$ …
Alcohols, Phenols and Ethers Alcohols and Phenols Cumene Process
MediumFigure-basedIdea asked in 2 papersAsked the year before
Q48
The correct structure of tribromooctaoxide is :
The p-Block Elements (Class 12)p-Block Elements (Groups 15-18)Structures of Halogen Oxides and Oxoacids
HardFigure-basedNew idea
Q49
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :
Structure of Atom Quantum Numbers The (n+l) Rule
MediumOne-line MCQNew idea
Q50
Which of the following reactions are disproportionation reaction ? (a) $2Cu^+ \to Cu^{2+} + Cu^0$ (b)…
Redox Reactions Disproportionation Reactions
MediumOtherNew idea
Q51
Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by…
Thermodynamics First Law of Thermodynamics Work Against Constant External Pressure
EasyNumericalNew idea
Q52
Among the following, the one that is not a green house gas is :
Environmental Chemistry Greenhouse Gases
EasyOne-line MCQNew idea
Q53
For the cell reaction $2Fe^{3+}(aq) + 2I^-(aq) \to 2Fe^{2+}(aq) + I_2(aq)$ $E^\ominus_{cell} = 0.24$ V at 298 K. The standard Gibbs energy…
Electrochemistry Nernst Equation Gibbs Free Energy and EMF
EasyNumericalNew ideaIdea asked in 2 papers
Q54
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is :
The s-Block Elements Alkaline Earth Metals Biological Role of Mg and Ca
EasyOne-line MCQNew ideaIdea asked in 2 papers
Q55
The most suitable reagent for the following conversion, is : $H_3C-C\equiv C-CH_3 \to$ cis-2-butene
Hydrocarbons Hydrocarbons (Alkynes)Controlled Hydrogenation (Cis/Trans)
EasyOne-line MCQ · figureNew idea
Q56
Which is the correct thermal stability order for $H_2E$ (E = O, S, Se, Te and Po) ?
The p-Block Elements (Class 12)p-Block Elements (Groups 15-18)Group 16 Hydrides
EasyOne-line MCQNew ideaIdea asked in 3 papers
Q57
Which of the following is incorrect statement ?
The p-Block Elements (Class 11)p-Block (Group 13-14)Inert Pair Effect in Group 13
MediumOne-line MCQNew ideaIdea asked in 2 papers
Q58
Match the following : (a) Pure nitrogen | (i) Chlorine (b) Haber process | (ii) Sulphuric acid (c) Contact process | (iii) Ammonia (d)…
The p-Block Elements (Class 12)p-Block Elements (Groups 15-18)Industrial Processes in the p-Block
MediumMatch the listsNew idea
Q59
Which of the following diatomic molecular species has only π bonds according to Molecular Orbital Theory ?
Chemical Bonding and Molecular Structure Molecular Orbital Theory Pi-Only Bonding in C2
MediumOne-line MCQNew idea
Q60
For the second period elements the correct increasing order of first ionisation enthalpy is :
Classification of Elements and Periodicity in Properties Periodic Properties Ionization Enthalpy Trends
MediumOne-line MCQNew ideaIdea asked in 3 papers
Q61
The biodegradable polymer is :
Polymers Biodegradable Polymers
EasyOne-line MCQNew idea
Q62
pH of a saturated solution of $Ca(OH)_2$ is 9. The solubility product $(K_{sp})$ of $Ca(OH)_2$ is :
Equilibrium pH and Buffer Solutions pH of Hydroxide Precipitation
MediumNumericalNew idea
Q63
If the rate constant for a first order reaction is k, the time (t) required for the completion of 99% of the reaction is given by :
Chemical Kinetics First Order Percentage Completion Time Shortcuts
EasyNumericalNew idea
Q64
The non-essential amino acid among the following is :
Biomolecules Biomolecules (Chemistry)Classification of Amino Acids
EasyOne-line MCQIdea asked in 3 papersAsked the year before
Q65
Among the following, the reaction that proceeds through an electrophilic substitution, is :
Haloalkanes and Haloarenes Nucleophilic Substitution Preparation of Haloarenes
MediumOne-line MCQ · figureNew ideaIdea asked in 2 papers
Q66
The mixture that forms maximum boiling azeotrope is :
Solutions Solutions and Colligative Properties Azeotropes
MediumOne-line MCQNew idea
Q67
For the chemical reaction $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$ the correct option is :
Chemical Kinetics Rate of Appearance and Disappearance
EasyOne-line MCQNew idea
Q68
The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is :
Some Basic Concepts of Chemistry Mole Concept Stoichiometric Calculations
EasyNumericalIdea asked in 5 papersAsked the year before
Q69
The compound that is most difficult to protonate is :
Alcohols, Phenols and Ethers Alcohols and Phenols Basicity of Alcohols, Ethers and Phenols
MediumOne-line MCQ · figureNew idea
Q70
For an ideal solution, the correct option is :
Solutions Solutions and Colligative Properties Ideal Solutions
EasyOne-line MCQNew ideaIdea asked in 2 papers
Q71
Conjugate base for Brönsted acids $H_2O$ and HF are :
Equilibrium pH and Buffer Solutions Conjugate Acid-Base Pair Ka and Kb Relationship
EasyOne-line MCQNew idea
Q72
Which mixture of the solutions will lead to the formation of negatively charged colloidal $[AgI]I^-$ sol. ?
Surface Chemistry Surface Chemistry and Colloids Charge on Sols
HardOne-line MCQNew idea
Q73
Among the following, the narrow spectrum antibiotic is :
Chemistry in Everyday Life Antibiotics: Narrow and Broad Spectrum
MediumOne-line MCQNew idea
Q74
An alkene "A" on reaction with $O_3$ and $Zn-H_2O$ gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene "A" gives "B"…
Hydrocarbons Hydrocarbons (Alkenes)Reverse Ozonolysis (Parent Alkene Identification)
MediumOne-line MCQ · figureNew ideaIdea asked in 2 papers
Q75
What is the correct electronic configuration of the central atom in $K_4[Fe(CN)_6]$ based on crystal field theory ?
Coordination Compounds Crystal Field Theory Hexacyanoferrate vs Hexafluoroferrate Comparison
MediumOne-line MCQNew idea
Q76
Identify the incorrect statement related to $PCl_5$ from the following :
The p-Block Elements (Class 12)p-Block Elements (Groups 15-18)Phosphorus Halides
MediumOne-line MCQNew idea
Q77
Which will make basic buffer ?
Equilibrium pH and Buffer Solutions Identifying Buffer Solutions
MediumOne-line MCQNew idea
Q78
The major product of the following reaction is : Phthalic acid (benzene-1,2-dicarboxylic acid) + $NH_3 \xrightarrow{strong\ heating}$
Aldehydes, Ketones and Carboxylic Acids Carboxylic Acid Derivatives
MediumFigure-basedNew idea
Q79
Match the Xenon compounds in Column - I with its structure in Column - II and assign the correct code : Column - I | Column - II (a)…
The p-Block Elements (Class 12)p-Block Elements (Groups 15-18)Xenon Fluorides and Oxides
MediumMatch the listsNew ideaIdea asked in 2 papers
Q80
The manganate and permanganate ions are tetrahedral, due to :
The d- and f-Block Elements d- and f-Block Elements Structures of Chromate, Dichromate, Manganate and Permanganate
MediumOne-line MCQNew idea
Q81
Which of the following species is not stable ?
The p-Block Elements (Class 11)p-Block (Group 13-14)Hydrolysis Mechanism of SiCl4 vs CCl4
MediumOne-line MCQNew idea
Q82
For a cell involving one electron $E^\ominus_{cell} = 0.59$ V at 298 K, the equilibrium constant for the cell reaction is : [Given that…
Electrochemistry Nernst Equation Cell Potential and Equilibrium
MediumNumericalNew idea
Q83
Which of the following is an amphoteric hydroxide ?
The s-Block Elements Alkaline Earth Metals Amphoteric Nature of BeO and Be(OH)2
EasyOne-line MCQNew idea
Q84
A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option…
States of Matter Ideal Gas Law Compressibility Factor
MediumOne-line MCQNew idea
Q85
A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of…
The Solid State Formula from Void Occupancy
MediumOne-line MCQNew idea
Q86
In which case change in entropy is negative ?
Thermodynamics Gibbs Free Energy Entropy Change Prediction
EasyOne-line MCQNew ideaIdea asked in 3 papers
Q87
Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region ?
Structure of Atom Quantum Numbers Hydrogen Spectral Series
EasyOne-line MCQNew idea
Q88
The method used to remove temporary hardness of water is :
Hydrogen Hydrogen and Water Hardness of Water
EasyOne-line MCQNew idea
Q89
Which one is malachite from the following ?
General Principles and Processes of Isolation of Elements General Principles of Metallurgy Ores and Minerals
EasyOne-line MCQNew ideaIdea asked in 2 papers
Q90
The correct order of the basic strength of methyl substituted amines in aqueous solution is :
Amines Amines and Diazonium Salts Aqueous Basicity Order of Methylamines
MediumOne-line MCQNew idea

Questions from the official NEET UG 2019 paper (NTA). Chapter, topic and idea tags and difficulty are Lumi’s.

Chemistry in every NEET paper

NEET 2019 Physics NEET 2019 Biology The whole 2019 paper Chemistry across ten years