MOST
SCORING CHAPTERS / CONCEPTS THAT ONE SHOULD KNOW BEFORE EXAM ?
Greetings to Everyone
So folks last month left for preparation,25
days to go for JEE Main 2020 exam. I have gone through the same phase last
year that most students are going through Last month left for jee mains
and confused what to study in this time. So i am telling you chapters from
which you can easily fetch marks and can get a good score .
PHYSICS
Unit 1: Physics And
Measurement
·
Physics, technology and society, S
I units, Fundamental and derived units
·
Least count, accuracy and
precision of measuring instruments,
·
Errors in measurement,
·
Dimensions of Physical quantities,
dimensional analysis and its applications
Every year 2-3 question are asked regarding
error correction and dimensional analysis.
Unit 2: Kinematics
·
Motion in a straight line:
Position-time graph, speed and velocity
·
Uniformly accelerated motion,
velocity-time, position-time graphs, relations for uniformly accelerated
motion.
·
Scalars and Vectors, Vector
addition and Subtraction, Zero Vector, Scalar and Vector products, Unit Vector,
Resolution of a Vector
·
Relative Velocity, Motion in a
plane, Projectile Motion, Uniform Circular Motion.
Every year 1-2 question are asked mixing it
with other chapters . Projectile motion concepts are very important .
Unit 6: Gravitation
·
The universal law of gravitation.
·
Acceleration due to gravity and
its variation with altitude and depth.
·
Gravitational potential energy;
gravitational potential.
·
Escape velocity,Orbital velocity
of a satellite. Geo-stationary satellites.
Every year 1-2 question are asked mixing it
with other chapters . Escape velocity / orbital velocity concepts are very
important.
Unit 8: Thermodynamics
·
Thermal equilibrium, zeroth law of
thermodynamics, concept of temperature.
·
Heat, work and internal energy.
·
First law of thermodynamics.
·
Second law of thermodynamics:
reversible and irreversible processes.
·
Carnot engine and its efficiency.
Every year 2-3 question are asked
mixing it with other chapters. Graph based questions and carnot engine
questions are asked .
Unit 9: Kinetic Theory Of Gases
·
Equation of state of a perfect
gas, work done on compressing a gas.
·
Kinetic theory of gases –
assumptions, concept of pressure.
·
Kinetic energy and temperature:
rms speed of gas molecules; Degrees of freedom, Law of equipartition of energy,
applications to specific heat capacities of gases; Mean free path, Avogadro’s
number.
Every year 1-2 question are asked mixing it
with other chapters. Basic concepts should be clear .
Formula based chapter , easy questions are
asked .
Unit 12: Currrent Electricity
·
Electric Cell and its Internal
resistance, potential difference and emf of a cell, combination of cells in
series and in parallel.
·
Kirchhoff’s laws and their
applications.
·
Wheatstone bridge, Metre bridge.
·
Potentiometer – principle and its
applications.
Questions are asked majorly on devices and
application like potentiomenter, and question are asked to solve circuits by
symmetry and other methods to solve circuits .
Unit 14: Electromagnetic Induction
And Alternating Currents
·
Electromagnetic induction;
Faraday’s law, induced emf and current; Lenz’s Law, Eddy currents.
·
Self and mutual inductance.
·
Alternating currents, peak and rms
value of alternating current/ voltage; reactance and impedance; LCR series
circuit, resonance; Quality factor, power in AC circuits, wattless current.
All combination of circuits are very
important CR,LR,LC . Their voltage and current relationship can be asked . Also
rms value of current and transformer formula is very important .
Unit 16: Optics
·
wavefront and Huygens’ principle,
Laws of reflection and refraction using Huygen’s principle. Interference,
Young’s double slit experiment and expression for fringe width.
·
Diffraction due to a single slit,
width of central maximum.
·
Resolving power of microscopes and
astronomical telescopes, Polarisation, plane polarized light; Brewster’s law,
uses of plane polarized light and Polaroids.
Simple question based on young double slit
experiment are asked and lens formula . Must do chapter as weightage is high of
this chapter .
Unit 17: Dual Nature Of Matter And
radiation
·
Dual nature of radiation.
·
Photoelectric effect, Hertz and
Lenard’s observations; Einstein’s photoelectric equation; particle nature of
light.
·
Matter waves-wave nature of
particle, de Broglie relation.
·
Davisson-Germer experiment.
Every year 1-2 question are asked mixing it
with other chapters . Photoelectric effects graph concepts are very important.
Unit 18: Atoms And Nuclei
·
Alpha-particle scattering
experiment; Rutherford’s model of atom; Bohr model, energy levels, hydrogen
spectrum.
·
Composition and size of nucleus,
atomic masses, isotopes, isobars; isotones.
·
Radioactivity-alpha, beta and
gamma particles/rays and their properties; radioactive decay law. Mass-energy
relation, mass defect; binding energy per nucleon and its variation with mass
number, nuclear fission and fusion.
Every year 1-2 question are asked mixing it
with other chapters . Energy level in atom , formula , transitions and atomic
collisions concepts are very important.
Unit 20: Communication Systems
·
Propagation of electromagnetic
waves in the atmosphere; Sky and space wave propagation,
·
Need for modulation,
·
Amplitude and Frequency
Modulation,
·
Bandwidth of signals,
·
Bandwidth of Transmission medium,
Every year 1-2 question are asked mixing it
with other chapters .Formula of power transmitted , and basic concepts are
very important.
MATHEMATICS
Unit 2:Quadratic equations
·
Quadratic equations in real and
complex number system and their solutions.
·
Relation between roots and
co-efficients, nature of roots, formation of quadratic equations with given
roots.
Every year 1-2 questions are asked and it is
very easy to solve . Must do chapter .
Unit 3: Matrices and determinants
·
Matrices,
·
algebra of matrices,
·
types of matrices,
·
determinants and
·
matrices of order two and three.
·
Properties of determinants,
·
evaluation of determinants,
·
area of triangles using
determinants.
·
Adjoint and evaluation of inverse
of a square matrix using determinants and elementary transformations,
·
Test of consistency and solution
of simultaneous linear equations in two or three variables using determinants
and matrices.
Very easy questions are asked from this
chapter , but seems tough because there is hidden trick in every question .
Every year question is asked .
Unit 7: Sequences and series
·
Arithmetic and Geometric
progressions,
·
insertion of arithmetic,
·
geometric means between two given
numbers
·
relation between A.M. and G.M. sum
upto n terms of special series: S n, S n2, Sn3
·
Arithmetic – Geometric progression
Formula based chapter , if you have practiced
it in past then definitely you will be able to solve this chapter problems
in exams.
Unit 6: Binomial theorem and its
simple applications
·
Binomial theorem for a positive
integral index,
·
general term and middle term,
·
properties of Binomial
coefficients
·
simple applications
Formula based chapter very easy to do . These
questions will definitely fetch you marks .
UNIT 8: Limit, continuity and
differentiability
Formula and practice based chapter , L-
hospital rule , and very easy questions on limit is asked , just learn how to
solve problems using this .
Unit 10: Differential equations
Just learn how to solve linear DE and
homogeneous equation . every year question is asked based on it only .
Unit 14: Statistics and
probability
Measures of Dispersion: Calculation of mean, median, mode of
grouped and ungrouped data calculation of standard deviation, variance and mean
deviation for grouped and ungrouped data.
Probability: Probability of an event, addition and
multiplication theorems of probability, Baye’s theorem, probability
distribution of a random variate, Bernoulli trials and Binomial distribution.
Every year question are asked of Bayes
theorem , learn how to do question on Bayes theorem it is coming in exams.
Unit 15: Application of
Trigonometry
Heights and Distances
Every year question is asked from this
concept
Unit 16: Mathematical reasoning
·
Statements, logical operations
and, or, implies, implied by, if and only if
·
Understanding of tautology,
contradiction, converse and contrapositive
Every year there is fixed one question from
this chapter . Must do chapter .
CHEMISTRY
Unit 3: Atomic Structure
·
various quantum numbers
(principal, angular momentum and magnetic quantum numbers) and their
significance
·
shapes of s, p and d – orbitals,
electron spin and spin quantum number
·
Rules for filling electrons in
orbitals – aufbau principle, Pauli’s exclusion principle and Hund’s rule,
electronic configuration of elements, extra stability of half-filled and
completely filled orbitals.
Unit 4: Chemical Bonding And
Molecular Structure
·
Covalent Bonding: Concept of
electronegativity, Fajan’s rule, dipole moment
·
Valence Shell Electron Pair
Repulsion (VSEPR) theory and shapes of simple molecules
·
Quantum mechanical approach to
covalent bonding: Valence bond theory – Its important features, concept of
hybridization involving s, p and d orbitals
·
Resonance
Molecular Orbital Theory – Its important features, LCAOs, types of molecular
orbitals (bonding, antibonding), sigma and pi-bonds, molecular orbital
electronic configurations of homonuclear diatomic molecules, concept of bond
order, bond length and bond energy.
Unit 6: Solutions
·
Different methods for expressing
concentration of solution – molality, molarity, mole fraction, percentage (by
volume and mass both), vapour pressure of solutions and Raoult’s Law – Ideal
and non-ideal solutions, vapour pressure – composition, plots for ideal and
non-ideal solutions
·
Colligative properties of dilute
solutions – relative lowering of vapour pressure, depression of freezing point,
elevation of boiling point and osmotic pressure
·
Determination of molecular mass
using colligative properties; Abnormal value of molar mass, van’t Hoff factor
and its significance
Unit 9 : Chemical Kinetics
·
Rate of a chemical reaction,
factors affecting the rate of reactions: concentration, temperature, pressure
and catalyst
·
elementary and complex reactions,
order and molecularity of reactions, rate law, rate constant and its units,
differential and integral forms ofzero and first-order reactions, their
characteristics and half-lives, effect of temperature on rate of reactions –
Arrhenius theory, activation energy and its calculation, collision theory of
bimolecular gaseous reactions (no derivation).
Unit 10: Surface Chemistry
·
Colloidal state- distinction among
true solutions, colloids and suspensions, classification of colloids –
lyophilic, lyophobic
·
multi molecular, macromolecular
and associated colloids (micelles), preparation and properties of colloids –
Tyndall effect, Brownian movement, electrophoresis, dialysis, coagulation and
flocculation
·
Emulsions and their
characteristics
Unit 11: Classificaton Of Elements
And Periodicity In Properties
Modem periodic law and present form of the
periodic table, s, p, d and f block elements, periodic trends in properties of
elements atomic and ionic radii, ionization enthalpy, electron gain enthalpy,
valence, oxidation states and chemical reactivity.
Unit 12: General Principles And
Processes Of Isolation Of Metals
Modes of occurrence of elements in nature,
minerals, ores; Steps involved in the extraction of metals – concentration,
reduction (chemical and electrolytic methods) and refining with special
reference to the extraction of Al, Cu, Zn and Fe; Thermodynamic and
electrochemical principles involved in the extraction of metals.
Unit 17: Co-Ordination Compounds
·
Introduction to co-ordination
compounds, Werner’s theory
·
ligands, co-ordination number,
denticity, chelation; IUPAC nomenclature of mononuclear co-ordination
compounds, isomerism
·
Bonding-Valence bond approach and
basic ideas of Crystal field theory, colour and magnetic properties; Importance
of co-ordination compounds (in qualitative analysis, extraction of metals and
in biological systems).
Unit 20: Some Basic Principles Of
Organic Chemistry
Nomenclature (Trivial and IUPAC)
Covalent bond fission – Homolytic and heterolytic: free radicals, carbocations
and carbanions; stability of carbocations and free radicals, electrophiles and
nucleophiles.
Electronic displacement in a covalent bond – Inductive effect, electromeric
effect, resonance and hyper conjugation
Unit 23: Organic Compounds
Containing Oxygen
General methods of preparation, properties,
reactions and uses.
Every year question is asked on Aldol Condensation and canizaro reaction . especially which involves formation of cyclic ring.
Unit 24: Organic Compounds
Containing Nitrogen
General methods of preparation, properties, reactions and uses. Diazotization is the most important topic .
Unit 25: Polymers
·
General introduction and
classification of polymers, general methods of polymerization-addition and
condensation, co polymerization
·
Natural and synthetic rubber and
vulcanization
·
some important polymers with
emphasis on their monomers and uses – polythene, nylon, polyester and Bakelite.
UNIT 26: Bio molecules
·
General introduction and
importance of biomolecules.
·
Carbohydrates –
Classification: aldoses and ketoses; monosaccharides (glucose and fructose) and
constituent monosaccharides of oligosacchorides (sucrose, lactose and maltose).
·
Proteins – Elementary Idea of r –
amino acids, peptide bond, polypeptides; Proteins: primary, secondary, tertiary
and quaternary structure (qualitative idea only), denaturation of proteins,
enzymes.
·
Vitamins – Classification and
functions.
·
Nucleic Acids – Chemical
constitution of DNA and RNA. Biological functions of nucleic acids.
UNIT 27: Chemistry in Everyday
Life
Chemicals in medicines – Analgesics,
tranquilizers, antiseptics, disinfectants, antimicrobials, antifertility drugs,
antibiotics, antacids, antihistamins – their meaning and common examples.
Chemicals in food – Preservatives, artificial
sweetening agents – common examples. Cleansing agents – Soaps and detergents,
cleansing action.
