NEET UG 2020 · Chemistry · 45 questions

NEET 2020 Chemistry, question by question

The NEET 2020 Chemistry section had 45 questions from 29 chapters: 27 easy, 18 medium and 0 hard. 60% were easy, 13 points above the 2017–2026 average for Chemistry, and 24 (53%) came from Class 12. Thermodynamics had the most, 3 questions.

Updated 2026-10-08

Questions: 45; 25% of the paper
Chapters asked: 29; 0 usual chapters skipped
Easy: 60%; 2017–2026 average 47%
From Class 12: 53%; 2017–2026 average 54%

The section

What Chemistry asked in 2020

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

2718

Easy
Medium
Hard

New ideas: 36 (80%)
Use a figure: 4

Question pattern

CHEMISTRY 2020

Recall29%
Calculation27%
Concept20%
Application18%
Match the lists7%

Chapters

The 2020 Chemistry chapter split

All 29 Chemistry chapters asked, and which got more or less than usual: the chapter’s ten-year average per 180 questions.

Every chapter asked

Thermodynamics3 · usually 3.1
Alcohols, Phenols and Ethers2 · usually 1.4
Aldehydes, Ketones and Carboxylic Acids2 · usually 2.6
Biomolecules2 · usually 1.4
Chemical Bonding and Molecular Structure2 · usually 2.3
Chemical Kinetics2 · usually 2.0
Classification of Elements and Periodicity in Properties2 · usually 1.3
Electrochemistry2 · usually 1.6
Equilibrium2 · usually 2.5
Hydrocarbons2 · usually 2.4
Organic Chemistry - Some Basic Principles and Techniques2 · usually 2.1
Solutions2 · usually 1.6
The d- and f-Block Elements2 · usually 2.0
The p-Block Elements (Class 11)2 · usually 1.3
The p-Block Elements (Class 12)2 · usually 2.2
The s-Block Elements2 · usually 1.1
Amines1 · usually 1.7
Chemistry in Everyday Life1 · usually 0.6
Coordination Compounds1 · usually 2.6
General Principles and Processes of Isolation of Elements1 · usually 0.8
Haloalkanes and Haloarenes1 · usually 1.5
Hydrogen1 · usually 0.6
Polymers1 · usually 0.6
Redox Reactions1 · usually 1.0
Some Basic Concepts of Chemistry1 · usually 1.3
States of Matter1 · usually 0.9
Structure of Atom1 · usually 1.5
Surface Chemistry1 · usually 0.8
The Solid State1 · usually 0.9

More than usual

The s-Block Elements+0.92 questions · usually 1.1
Classification of Elements and Periodicity in Properties+0.72 questions · usually 1.3
The p-Block Elements (Class 11)+0.72 questions · usually 1.3
Biomolecules+0.62 questions · usually 1.4
Alcohols, Phenols and Ethers+0.62 questions · usually 1.4
Solutions+0.52 questions · usually 1.6
Chemistry in Everyday Life+0.41 question · usually 0.6
Hydrogen+0.41 question · usually 0.6

Less than usual, or skipped

Coordination Compounds−1.61 question · usually 2.6
Amines−0.71 question · usually 1.7
Aldehydes, Ketones and Carboxylic Acids−0.62 questions · usually 2.6
Structure of Atom−0.51 question · usually 1.5
Equilibrium−0.52 questions · usually 2.5
Haloalkanes and Haloarenes−0.51 question · usually 1.5
Hydrocarbons−0.42 questions · usually 2.4
Some Basic Concepts of Chemistry−0.31 question · usually 1.3

Every question

All 45 Chemistry questions of NEET 2020

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

27 easy18 medium0 hard

Q91
Identify a molecule which does not exist.
Chemical Bonding and Molecular Structure Molecular Orbital Theory Existence of Diatomic Species
MediumOne-line MCQNew idea
Q92
Find out the solubility of $\mathrm{Ni(OH)_2}$ in 0.1 M NaOH. Given that the ionic product of $\mathrm{Ni(OH)_2}$ is $2\times10^{-15}$ .
Equilibrium pH and Buffer Solutions Common-Ion Effect on Solubility
MediumNumericalNew idea
Q93
Identify the correct statements from the following : (a) $\mathrm{CO_2(g)}$ is used as refrigerant for ice-cream and frozen food. (b) The…
The p-Block Elements (Class 11)p-Block (Group 13-14)Zeolites and ZSM-5 Catalysis
MediumOtherNew idea
Q94
Hydrolysis of sucrose is given by the following reaction. Sucrose + $\mathrm{H_2O \rightleftharpoons}$ Glucose + Fructose If the…
Equilibrium Chemical Equilibrium Standard Gibbs Free Energy and Equilibrium Constant
EasyNumericalNew ideaIdea asked in 2 papers
Q95
Identify compound X in the following sequence of reactions : $\mathrm{C_6H_5CH_3}$ $\xrightarrow{\mathrm{Cl_2}/h\nu}$ X…
Aldehydes, Ketones and Carboxylic Acids Benzal Chloride Route to Benzaldehyde
MediumOne-line MCQ · figureNew idea
Q96
Identify the incorrect match. Name | IUPAC Official Name (a) Unnilunium | (i) Mendelevium (b) Unniltrium | (ii) Lawrencium (c) Unnilhexium…
Classification of Elements and Periodicity in Properties Periodic Properties IUPAC Nomenclature for Elements Z > 100
MediumMatch the listsNew idea
Q97
An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is :
The Solid State Radius-Edge Relations in Cubic Cells
EasyNumericalNew idea
Q98
Which of the following set of molecules will have zero dipole moment ?
Chemical Bonding and Molecular Structure VSEPR Theory Zero Dipole Moment Geometries
MediumOne-line MCQNew idea
Q99
On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be :
Electrochemistry Electrolytic Conductance and Electrolysis Products of Electrolysis
EasyOne-line MCQNew idea
Q100
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :
Alcohols, Phenols and Ethers Alcohols and Phenols Alcohols from Grignard Reagents
EasyOne-line MCQNew idea
Q101
Which of the following oxoacid of sulphur has $-O-O-$ linkage ?
The p-Block Elements (Class 12)p-Block Elements (Groups 15-18)Oxoacids of Sulphur
MediumOne-line MCQNew ideaIdea asked in 2 papers
Q102
Which of the following amine will give the carbylamine test ?
Amines Amines and Diazonium Salts Hinsberg and Carbylamine Tests
EasyOne-line MCQ · figureNew idea
Q103
The calculated spin only magnetic moment of $\mathrm{Cr^{2+}}$ ion is :
The d- and f-Block Elements d- and f-Block Elements Magnetic Moment and Colour of d- and f-Block Ions
EasyNumericalIdea asked in 5 papers
Q104
The correct option for free expansion of an ideal gas under adiabatic condition is :
Thermodynamics First Law of Thermodynamics Free Expansion of an Ideal Gas
MediumOne-line MCQNew idea
Q105
The freezing point depression constant ( $K_f$ ) of benzene is 5.12 K kg mol $^{-1}$ . The freezing point depression for the solution of…
Solutions Solutions and Colligative Properties Depression of Freezing Point
EasyNumericalIdea asked in 2 papers
Q106
The number of Faradays(F) required to produce 20 g of calcium from molten $\mathrm{CaCl_2}$ (Atomic mass of Ca = 40 g mol $^{-1}$ ) is :
Electrochemistry Electrolytic Conductance and Electrolysis Faraday's Laws of Electrolysis
EasyNumericalNew ideaIdea asked in 2 papers
Q107
Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as :
Aldehydes, Ketones and Carboxylic Acids Aldol Condensation Cross-Aldol Reaction Selectivity
EasyOne-line MCQNew ideaIdea asked in 2 papers
Q108
Paper chromatography is an example of :
Organic Chemistry - Some Basic Principles and Techniques Purification, Analysis and Isomerism of Organic Compounds Chromatography
EasyOne-line MCQNew idea
Q109
An increase in the concentration of the reactants of a reaction leads to change in :
Chemical Kinetics Collision Theory Parameters
EasyOne-line MCQNew idea
Q110
A mixture of $\mathrm{N_2}$ and Ar gases in a cylinder contains 7 g of $\mathrm{N_2}$ and 8 g of Ar. If the total pressure of the mixture…
States of Matter Ideal Gas Law Dalton's Law of Partial Pressures
EasyNumericalNew ideaIdea asked in 2 papers
Q111
Identify the correct statement from the following :
General Principles and Processes of Isolation of Elements General Principles of Metallurgy Commercial Forms of Iron and Copper
MediumOne-line MCQNew idea
Q112
A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following ?
Organic Chemistry - Some Basic Principles and Techniques Electronic Effects Hyperconjugation Stability
EasyOne-line MCQNew idea
Q113
Which of the following is a cationic detergent ?
Chemistry in Everyday Life Soaps and Detergents
EasyOne-line MCQNew idea
Q114
Elimination reaction of 2-Bromo-pentane to form pent-2-ene is : (a) $\beta$ -Elimination reaction (b) Follows Zaitsev rule (c)…
Haloalkanes and Haloarenes Nucleophilic Substitution Dehydrohalogenation and Zaitsev's Rule
MediumOtherNew idea
Q115
The mixture which shows positive deviation from Raoult's law is :
Solutions Solutions and Colligative Properties Positive and Negative Deviations
MediumOne-line MCQNew ideaIdea asked in 3 papers
Q116
Which of the following is the correct order of increasing field strength of ligands to form coordination compounds ?
Coordination Compounds Crystal Field Theory Spectrochemical Series Usage
MediumOne-line MCQNew ideaIdea asked in 3 papers
Q117
Which of the following is a basic amino acid ?
Biomolecules Biomolecules (Chemistry)Classification of Amino Acids
EasyOne-line MCQIdea asked in 3 papersAsked the year before
Q118
HCl was passed through a solution of $\mathrm{CaCl_2}$ , $\mathrm{MgCl_2}$ and NaCl. Which of the following compound(s) crystallise(s) ?
The s-Block Elements s-Block Elements Purification of Sodium Chloride
MediumOne-line MCQNew idea
Q119
Which of the following is a natural polymer ?
Polymers Natural and Synthetic Rubber
EasyOne-line MCQNew idea
Q120
Which of the following is not correct about carbon monoxide ?
The p-Block Elements (Class 11)p-Block (Group 13-14)Mechanism of Carbon Monoxide Toxicity
EasyOne-line MCQNew idea
Q121
Sucrose on hydrolysis gives :
Biomolecules Biomolecules (Chemistry)Disaccharides and Invert Sugar
EasyOne-line MCQNew idea
Q122
The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for…
The s-Block Elements s-Block Elements Biological Role of Sodium and Potassium
EasyOne-line MCQNew idea
Q123
Which one of the followings has maximum number of atoms ?
Some Basic Concepts of Chemistry Mole Concept Mole-Mass-Particle Conversions
EasyNumericalIdea asked in 3 papers
Q124
The number of protons, neutrons and electrons in $^{175}_{71}\mathrm{Lu}$ , respectively, are :
Structure of Atom Quantum Numbers Atomic Number, Mass Number and Particle Counts
EasyOne-line MCQNew idea
Q125
What is the change in oxidation number of carbon in the following reaction ? $\mathrm{CH_4(g) + 4Cl_2(g) \to CCl_4(l) + 4HCl(g)}$
Redox Reactions Calculating Oxidation Numbers
EasyOne-line MCQIdea asked in 4 papers
Q126
Identify the incorrect statement.
The d- and f-Block Elements d- and f-Block Elements Cr(II) Reducing Power and Interstitial Compounds
MediumOne-line MCQNew idea
Q127
For the reaction, $\mathrm{2Cl(g) \to Cl_2(g)}$ , the correct option is :
Thermodynamics Gibbs Free Energy Entropy Change Prediction
EasyOne-line MCQIdea asked in 3 papersAsked the year before
Q128
Measuring Zeta potential is useful in determining which property of colloidal solution ?
Surface Chemistry Surface Chemistry and Colloids Electrical Double Layer and Zeta Potential
EasyOne-line MCQNew idea
Q129
Urea reacts with water to form A which will decompose to form B. B when passed through $\mathrm{Cu^{2+}}$ (aq), deep blue colour solution…
The p-Block Elements (Class 12)p-Block Elements (Groups 15-18)Ammonia and the Tetraamminecopper(II) Complex
MediumOne-line MCQNew idea
Q130
Match the following and identify the correct option. (a) $\mathrm{CO(g) + H_2(g)}$ | (i) $\mathrm{Mg(HCO_3)_2 + Ca(HCO_3)_2}$ (b)…
Hydrogen Hydrogen and Water Preparation of Dihydrogen
MediumMatch the listsNew idea
Q131
Match the following : Oxide | Nature (a) CO | (i) Basic (b) BaO | (ii) Neutral (c) $\mathrm{Al_2O_3}$ | (iii) Acidic (d)…
Classification of Elements and Periodicity in Properties Periodic Properties Acidic, Basic, and Amphoteric Nature of Oxides
EasyMatch the listsNew idea
Q132
The rate constant for a first order reaction is $4.606\times10^{-3}$ s $^{-1}$ . The time required to reduce 2.0 g of the reactant to 0.2 g…
Chemical Kinetics First Order Integrated Rate Law
EasyNumericalIdea asked in 4 papers
Q133
An alkene on ozonolysis gives methanal as one of the product. Its structure is :
Hydrocarbons Hydrocarbons (Alkenes)Retro-Ozonolysis (Reactant Identification)
MediumOne-line MCQ · figureNew idea
Q134
Which of the following alkane cannot be made in good yield by Wurtz reaction ?
Hydrocarbons Hydrocarbons (Alkanes)Wurtz Reaction Mechanism
MediumOne-line MCQIdea asked in 2 papers
Q135
Anisole on cleavage with HI gives :
Alcohols, Phenols and Ethers Alcohols and Phenols Cleavage of Ethers by HI
EasyOne-line MCQ · figureIdea asked in 3 papers

Questions from the official NEET UG 2020 paper (NTA). Chapter, topic and idea tags and difficulty are Lumi’s.

Chemistry in every NEET paper

NEET 2020 Physics NEET 2020 Biology The whole 2020 paper Chemistry across ten years