Oswaal IIT JEE Main Solved Papers Chemistry Chapterwise and Topicwise 2019 and 2020 All shifts 32 Papers

257 Pages·2020·35.465 MB·English

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CHEMISTRY
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1 ST EDITION, YEAR 2020-21
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“978-93-5423-008-0”
SYLLABUS JEE (MAIN)
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PREFACE
Logical thinkers, problem solvers, creators, engineers are definitely the most recognisable and
valued people around the world. But many students preparing for JEE still ask; how good is
engineering as a career option?
Engineering has become the most lucrative profession now more than ever, with the demand
for engineers exceeding their supply. Engineers bring ideas to life. In every field, engineers play
a very important role in devising and executing new and better technologies. Thus, to take up
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Every aspiring engineer in the country works diligently for this exam. This makes JEE a highly
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With the core objective of “Learning Made Simple” Oswaal Editorial Board has designed
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with the Scheme of Examination issued by the NTA on 16th Dec 2020.
Benefits of studying from this book are:
1. Based on the Scheme of Examination issued by the NTA on 16th Dec 2020
2. Fully Solved Papers of 2019 & 2020 JEE (Main)
3. Chapter-wise & Topic-wise presentation for systematic learning
4. Subjective (Integer Types) Questions for extensive practice
5. Concept Revision (Video Based) for hybrid learning
6. Commonly Made Errors to polish concepts
7. Mind Maps for better retention
8. Mnemonics for memorise the concepts.
This book aims to make students exam-ready, boost their confidence and help them achieve
better results.
We hope that OSWAAL JEE (Main) Solved Papers 2019 & 2020 will help you at every step as
you move closer to your educational career goal. We wish you all great success ahead!

TEAM OSWAAL
( 5 )
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CONTENTS
g Latest Syllabus for Academic Year 2021 9 - 12
g 10 Tips & Tricks to Crack JEE (Main) 13 - 13
g Trend Analysis JEE (Main) 2019 & 2020 14 - 14
g Mnemonics 15 - 24
1. Some Basic Concepts in Chemistry 1 - 8 8. Redox Reactions and Electrochemistry 67 - 77
2. States of Matter 9 - 17 Topic 1. Redox Reactions
Topic 1. Gases and Liquid State Topic 2. Electrochemistry
Topic 2. Solid State
9. Chemical Kinetics and Surface
3. Atomic Structure 18 - 27
Chemistry 78 - 94
Topic 1. Bohr’s Atomic Model, Sommerfeld
Topic 1. Chemical Kinetics
Concept
Topic 2. Surface Chemistry
Topic 2. Quantum Approach
10. Classification of Elements and Periodicity
Topic 3. Photoelectric Effect
in Properties 95 - 100
4. Chemical Bonding and Molecular
11. General Principles and Processes of
Structure 28 - 35
Topic 1. Development of Chemical Bonding Isolation of Metals 101 - 107
Topic 2. Molecular Orbital Theory Topic 1. Metallurgy
5. Chemical Thermodynamics 36 - 45 Topic 2. Ellingham Diagram
Topic 1. First Law of Thermodynamics, Reversible 12. Hydrogen, s & p Block Elements 108 - 118
and Irreversible processes
Topic 1. Hydrogen
Topic 2. Chemical Thermodynamics, Hess’s Law
Topic 2. s-block Elements
Topic 3. 2nd Law of Thermodynamics
Topic 3. p-block Elements
6. Solutions 46 - 55
13. d & f - Block Elements, and Coordination
Topic 1. Different Methods for Expressing
Concentration of Solution Compounds 119 - 134
Topic 2. Colligative Properties of dilute Topic 1. d and f Block Element
solutions, Van’t Hoff’s Factor and
Topic 2. Co-ordination Compounds
its significance
14. Environmental Chemistry 135 - 139
7. Equilibrium 56 - 66
15. Purification, Basic Principles
Topic 1. Equilibria Involving Physical Process
and Characteristics of organic
Topic 2. Concept of Acid, Base, Ionic Equilibria,
compounds 140 - 148
Hydrolysis of Salts, Buffer Solution
Topic 1. Purification and Characterisation
of Organic Compounds
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... contd.
Topic 2. Some Basic Principles of Organic Topic 1. Amines
Chemistry Topic 2. Diazonium Salts
16. Hydrocarbons and their Halogen 19. Polymers and Biomolecules 200 - 210
Derivatives 149 - 165
Topic 1. Polymers
Topic 1. Alkanes, Alkenes, Alkynes
Topic 2. Biomolecules
Topic 2. Halogen and their derivatives
20. Analytical Chemistry and Chemistry in
17. Organic Compounds Containing Everyday life 211 - 219
Oxygen 166 - 185
Topic 1. Practical Chemistry in Organic
Topic 1. Alcohols, Phenols and Ethers
Chemistry
Topic 2. Aldehydes and Ketones
Topic 2. Practical chemistry in
Topic 3. Carboxylic Acids and its Derivatives
inorganic chemistry
18. Organic Compounds Containing Topic 3. Chemistry in everyday life
Nitrogen 186 - 199
l Appendix 220 - 232

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JEE (Main) Latest Syllabus for Academic Year (2021)
CHEMISTRY
SECTION - A
PHYSICAL CHEMISTRY
Unit 1 : Some Basic Concepts in Chemistry aufbau principle, Pauli’s exclusion principle and
Hund’s rule, electronic configuration of elements,
Matter and its nature, Dalton’s atomic theory;
extra stability of half- filled and completely filled
Concept of atom, molecule, element and com-
orbitals.
pound; Physical quantities and their measure-
ments in Chemistry, precision and accuracy, Unit 4 : Chemical Bonding and Molecular Structure
significant figures, S.I. units, dimensional analy-
Kossel - Lewis approach to chemical bond forma-
sis; Laws of chemical combination; Atomic and
tion, concept of ionic and covalent bonds.
molecular masses, mole concept, molar mass,
Ionic Bonding: Formation of ionic bonds, factors
percentage composition, empirical and molecu-
affecting the formation of ionic bonds; calculation
lar formulae; Chemical equations and stoichiom-
of lattice enthalpy.
etry.
Covalent Bonding: Concept of electronegativity,
Unit 2 : States Of Matter Fajan’s rule, dipole moment; Valence Shell Elec-
tron Pair Repulsion (VSEPR) theory and shapes
Classification of matter into solid, liquid and
of simple molecules.
gaseous states.
Quantum mechanical approach to covalent
Gaseous State:
Bonding: Valence bond theory - Its important
Measurable properties of gases; Gas laws- Boyle’s
features, concept of hybridization involving s, p
law, Charle’s law, Graham’s law of diffusion,
and d orbitals; Resonance.
Avogadro’s law, Dalton’s law of partial pressure;
Molecular Orbital Theory: Its important features,
Concept of Absolute scale of temperature; Ideal
LCAOs, types of molecular orbitals (bonding,
gas equation; Kinetic theory of gases (only
antibonding), sigma and pi-bonds, molecular
postulates); Concept of average, root mean
orbital electronic configurations of homonuclear
square and most probable velocities; Real gases,
diatomic molecules, concept of bond order, bond
deviation from Ideal behaviour, compressibility
length and bond energy.
factor and van der Waals equaation.
Elementary idea of metallic bonding. Hydrogen
Liquid State:
bonding and its applications.
Properties of liquids- vapour pressure, viscosity
and surface tension and effect of temperature on Unit 5 : Chemical Thermodynamics
them (qualitative treatment only).
Fundamentals of thermodynamics: System and
Solid State:
surroundings, extensive and intensive proper-
Classification of solids: molecular, ionic, covalent
ties, state functions, types of processes
and metallic solids, amorphous and crystalline
First law of thermodynamics: Concept of work,
solids (elementary idea); Bragg’s Law and its
heat internal energy and enthalpy, heat capacity,
applications; Unit cell and lattices, packing in
molar heat capacity; Hess’s law of constant heat
solids (fcc, bcc and hcp lattices), voids, calculations
summation; Enthalpies of bond dissociation,
involving unit cell parameters, imperfection in
combustion, formation, atomization, sublimation,
solids; Electrical and magnetic properties.
phase transition, hydration, ionization and
Unit 3 : Atomic Structure solution.
Second law of thermodynamics; Spontaneity
Thomson and Rutherford atomic models and
of processes; ∆S of the universe and ∆G of the
their limitations; Nature of electromagnetic
system as criteria for spontancity, ∆G0 (Standard
radiation, photoelectric effect; Spectrum of
Gibbs energy change) and equilibrium constant.
hydrogen atom, Bohr model of hydrogen atom-
its postulates, derivation of the relations for Unit 6 : Solutions
energy of the electron and radii of the different
Different methods for expressing concentration
orbits, limitations of Bohr’s model; Dual nature
of solution- molality, molarity, mole fraction,
of matter, de- Broglie’s relationship, Heisenberg
percentage (by volume and mass both), vapour
uncertainty principle. Elementary ideas of
pressure of solutions and Raoult’s Law- Ideal
quantum mechanics, quantum mechanical
and non-ideal solutions, vapour pressure -
model of atom, its important features. Concept
composition, plots for ideal and non-ideal
of atomic orbitals as one electron wave functions;
solutions; Colligative properties of dilute
Variation of Y and Y2 with r for 1s and 2s
solutions - relative lowering of vapour pressure,
orbitals; various quantum numbers (principal,
depression of freezing point, elevation of
angular momentum and magnetic quantum
boiling and osmotic pressure; Determination
numbers) and their significance; shapes of s, p
of molecular mass using colligative properties;
and d-orbitals, electron spin and spin quantum
Abnormal value of molar mass, van’t Hoff factor
number; Rules for filling electrons in orbitals-
and its significance.
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