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Physics By SSI Sir

Topic / Faculty Lecture Details Buy
Simple Harmonic Motion
By SSI Sir
No. of Lect. 11 Demo
Lecture# Description Duration
01 Definitions of periodic motion, oscillatory motion, and SHM, frequency, time period, amplitude, angular frequency.Differential equation of SHM, equation of SHM, 32 Minutes
02 SHM as projection of uniform circular motion, phase, 30 Minutes
03 Problems on phase , equation of SHM when mean position is not at origin. 30 Minutes
04 Velocity, acceleration and displacement of particle in terms of time (t) and displacement (x). Graphs, potential, kinetic and total energy in terms of time (t) and displacement (x), important graphs. 54 Minutes
05 Force method to find the time period, spring mass system , 47 Minutes
06 problems on force method, combinations of springs , springs in series , springs in parallel, 17 Minutes
07 energy methods to find the time period and Problems on spring mass system 46 Minutes
08 Angular SHM ,Differential equation of angular SHM, equation of angular SHM, method to find the time period in angular SHM 30 Minutes
09 Time period of simple pendulum, time period of simple pendulum when forces other than gravity and tension are also present, effective g. Fractional and percentage error , error in measurement of g, time period of simple pendulum when length of wire is comparable to radius of earth, Compound pendulum, its time period, minimum time period, 52 Minutes
10 Problems on compound pendulum , Torsional pendulum. 22 Minutes
11 Superposition of two parallel SHMs and perpendicular SHMs. 40 Minutes

Topic / Faculty Lecture Details Buy
Geometrical optics
By SSI Sir
No. of Lect. 26 Demo
Lecture# Description Duration
01 law of rectilinear propagation of light, Law of independence of light rays, Law of reversibility, Laws of reflections, types of reflection, regular  and  diffused reflection, Plane  mirror, definition of Object and Image, virtual and real Object/Image. Image formation by plane mirror, Important points about Image formation by plane mirror, motion of object and its Image 52 Minutes
02 Problems on motion of object and image in 3D, Rotation of Mirror and Incident ray  46 Minutes
03 Problems , Images formed by two mutually inclined mirrors, field of view-  50 Minutes
04 Problems, Angle of deviation due to reflection  16 Minutes
05 Curved mirrors, some definitions (terms) related with curved mirrors. Paraxial rays, focal plane.  42 Minutes
06 sign conventions,  Mirror formula, magnifications 28  Minutes
07 ray diagram  28 Minutes
08 problems, some examples, multiple reflections  34 Minutes
09 motion of object and image, lateral magnifications  46 Minutes
10 1/v versus 1/u graphs, U-V graphs, Newton’s mirror formula  59 Minutes
11 Refraction, Refractive index, Snell’s laws, some important points to remember, refraction through plane surface and parallel slabs.  46 Minutes
12 Image formation due to refraction through plane surface, actual depth and apparent depth, problems 41  Minutes
13 Lateral shift, Normal shift, combination of mirror and slabs 42  Minutes
14 critical angle, total internal reflection, circle of illuminance, deviation due to refraction through plane surface  40 Minutes
15 Prsim, Prism angle, angle of emergence, deviation by prism, condition for no emergence, angle of  deviation by prism in terms of angle of incidence and angle of emergence. Condition for minimum deviation, minimum deviation  41 Minutes
16 maximum deviation,thin prisms,  deviation by thin prism 23  Minutes
17 Cauchy’s equation, dispersion, mean deviation, angular dispersion, Dispersive power of Prism, combination of Prisms, Achromatic combination ,combination for direct vision  54 Minutes
18 Refraction through curved surface, formula relating “v” and “u”,  27 Minutes
19 Problems lateral and longitudinal magnification, motion of object and image.  27 Minutes
20 Thin lenses, classification of thin lenses, Lens maker’s formula and Lens formula-  35 Minutes
21 lateral and longitudinal magnification, Ray diagrams,  28 Minutes
22 sign convention, Image formation, Problems,  45 Minutes
23 problems , some important points to remember  28 Minutes
24 motion of Object and  image, , 1/v versus 1/u graphs, U-V graphs-  39 Minutes
25 power of lens, combination of lenses in contact. Combination of two lenses separated by distance “d”, combination of lenses and mirror in contact, focal  length when one face of a thin lens is silvered  56 Minutes
26 Displacement method to find the focal length of a lens,  15 Minutes

Inorganic & Physical Chemistry By NV Sir

Topic / Faculty Lecture Details Buy
Chemical equilibrium
By NV Sir
No Of Lect. 9 Demo
Lecture# Description Duration
01 Reversible & irreversible reactions, physical and chemical eq, homogeneous and heterogeneous eq, properties of eq, Kp, Kc, Kx, relation between Kp & Kc, relation between Kp and Kx, degree of dissociation 1 hr  13 Minutes
02 Effect of stoichiometry on kp & Kc, examples of homogeneous equilibrium 38 Minutes
03 Numericals of homogeneous eq. 29 Minutes
04 Heterogeneous eq., homogeneous liquid eq., significance of value of k, reaction quotient 53 Minutes
05 Approximation during calculation, relation between vapour density and degree of dissociation 53 Minutes
06 Thermodynamics for chemical eq, factor affecting composition of eq mixture , le-chatelier's principle, effect of concentration , effect of temperature 38 Minutes
07 Effect of change in pressure and volume , effect of catalyst 36 Minutes
08 Addition of inert gas at constant volume and constant pressure, le-chatelier's principle for physical eq, evaporation of water, boiling of water, melting of ice , melting of metal 1 hr
09 Solubility of gas in liquid , allotropic change , simultaneous eq. 42 Minutes

Topic / Faculty Lecture Details Buy
solid state
By NV Sir
No Of Lect. 9 Demo
Lecture# Description Duration
01 Types of solid, Crystal, Amorphous, unit cell, 2D, 3D, space,lattice. 42 Minutes
02 Primitive, body centred, face centered contribution of atoms in cubic unit cell. Packing fraction of square packing and hexagonal packing 47 Minutes
03 Coordination Number, packing fraction, density of solid.,Simple cubic, BCC, FCC, CCP 44 Minutes
04 Closed packing in 3D HCP packing,
    Linear void, Triangular void, Tetrahedral void, octahedral void, Cubical void Types of void in FCC
57 Minutes
05 Voids in FCC,Different radius ratio for ionic compounds. 47 Minutes
06 Calculation of nearest, next nearest and next to next nearest atoms in SC, BCC, FCC. 29 Minutes
07 Structure of NaCl type, Zns type, CaF2 type, Na2O type, CSCl type, Diamond 50 Minutes
08 Spinal structure, perovskite corundum structure, packing fraction of NaCl, Defect In crystal, Schottky, Frenkel, Interstitial 39 Minutes
09 Non stoichiometric defect, cation excess defect cation deficiency defect, Paramagnetic, Diamagnetic Ferromagnetic, Ferrimagnetic, Antiferromagnetic compound 31 Minutes

Organic Chemistry By VKP Sir

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By VKP Sir
No Of Lect. 11 Demo
Lecture# Description Duration
01 Basic organic chemistry, Definition of organic compound , Representation of organic compound , Hybridisation  12 Minutes
02 Number of Sigma and PI  bonds , Degree of carbon , Degree of hydrogen , Degree of Alkyl halides, Degree of Alcohols ,  Degree of Amines , Degree of unsaturation (DU) , Calculation of DU , Fundamental definition of DU, Homologous series (H.S.) 46 Minutes
03 Classification of organic compound , Aromatic compounds , Homocyclic compounds , Heterocyclic compounds , IUPAC- Nomenclature , Scheme of IUPAC, Naming of Alkanes 38 Minutes
04 Scheme of IUPAC, Naming of alkanes , Retained Names , Naming of alkenes 59 Minutes
05 Naming of Alkene, Naming of Alkynes , Naming of cycloalkanes 33 Minutes
06 Naming of cycloalkenes , Alkylidenes , Naming of cycloalkynes , Naming of Bicyclo compounds 42 Minutes
07 Functional Groups (F.G.), Naming of carboxylic acids, Special Name of carboxylic acids , Naming of dicarboxylic acids 33 Minutes
08 Naming of sulphonic acid , Naming of Alcohols , Naming of Amines , Naming of thioalcohols, Naming of Aldehydes , Special name of Aldehydes 49 Minutes
09 Naming of Ketones , Naming of cyanides , Special name of cyanides , Naming of isocyanides , Naming of Amides , Special name of amides , Naming of acid halides 46 Minutes
10 naming of acid halide, naming of acid anhydride, naming of esters, special name of ester 41 Minutes
11 Naming of haloalkanes , Naming of Nitro compounds , Naming of Nitroso compounds , Naming of Aromatic compound , Benzene , Other aromatic compound 38 Minutes

Topic / Faculty Lecture Details Buy
By VKP Sir
No Of Lect. 13 Demo
Lecture# Description Duration
01 Introduction, Classification of stereoisomerism, Geometrical Isomerism (G.I.)  20 Minutes

G.I. in C=C system , G.I. in Ring system , G.I. due to double bond inside the ring , Cummulenes

55 Minutes
03 G.I. in C=N system,  E/Z Nomenclature 55 Minutes
04 Number of geometrical Isomers, Cummulenes, Spiranes, Cycloalkylidenes, Diphenyl system, Physical properties of geometrical isomers 58 Minutes
05  Optical Isomerism , Plane polarised light , Chiral centre , Chirality ' Assymmetric molecules , Dissymmetric molecules , Plane of symmetry (POS), Centre of symmetry (COS) 1 Hr 09 Minutes
06  POS, COS. Chirality, Optical activity 55 Minutes
07 Wedge-Dash projection fromula , Fischer–Projection formula , Absolute configuration (R/S-configuration) , CIP-Rule 52 Minutes
08 Enantiomers , Diastereomers , Axis of symmetry (AOS)  
09 Erythro enantiomers, Threo enatiomers, D/L- Configuration (Relative configuration) , Number of stereoisomers , Pseudo chiral carbon (PCC), Racemic mixture (or, R/S-mixture) , Polarimeter , Functioning of polarimeter , Percentage enantiomeric excess (%EE), Optical purity 58 Minutes
10 Optical Resolution , Tertiary amine optical activity , Optical activity in absence of chiral centre , Cummulenes , Spiranes , Cycloalkylidene, Diphenyls , Alternating axis of symmetry (AAOS) , Conformational Isomerism Minutes
11 Conformational isomers , Newmann projection formula , Dihedral angle (DHA) , Tortional strain (T.S.) , Vander waals strain (V.S.) , Angle strain (A.S.) , Definition of conformational isomers, Conformational analysis , Sawhorse projection formula 57 Minutes
12 Conversion of Fischer to  Newmann, Conformational analysis of cyclohexane , Energy profile 51 Minutes
13 Conformational analysis of dimethyl cyclohexane 15 Minutes

Mathematics By Renu Mam

Permutations and combinations
Topic / Faculty Lecture Details Buy
Permutations and combinations
By Renu Mam
No Of Lect. 13 Demo
Lecture# Description Duration
01 Introduction of factorial n ( ⌊n or n!) , nCr, nPr, Physical interpretation of n!, nCr, nPr.  19 Minutes
02 Fundamental - Principles of counting
(i) Multiplication - Rule (ii) Addition- Rule
Basic Questions based on multiplication and addition-Rule; Sample-space.
 a-51 Min., b-49 Min.
03 Questions, Number Problems.  a-40 Min., b-35 Min.
04 Number problems based on divisible by 3, 4, 5, 25,
Theorem-1: Selection and Permutation of r things out of n.
Theorem-2 : Permutation of n things in which some things are of same kind.
 a-46 Min., b-28 Min.
05 Questions considering the word “RAKESH MODI” Questions, problem of forming words of 7 letters taking 3
vowels and 4 consonants using letters of word : “DIFFERENTIATION”.
Problem of forming the words each consisting 3 consonants and 3 vowels by using letters of words
 a-42 Min., b-25 Min., c-35 Min.
06 Rank (Position) of a word or numbers, sum of the numbers formed (No repetition or when repetition allowed),
Circular Permutation.
 a-35 Min., b-33 Min., C-35 Min.
07 Number of selection of r consecutive things out of n distinct things, Geometrical Problems Number of total
lines, number of diagonals, number of triangles
(a) One side common with given polygon
(b) Two sides common with given polygon
(c) Three sides common with given polygon.
(d) None of the side common with given polygon.
Chess board problems - Number of total rectangles, Number of total squares.
Problem based on moving from left bottom corner to the right top corner in a chess board.
 a-48 Min., b-57 Min.
08 Groupings & distribution of n differents things into groups or bundles.  a-30 Min., b-29 Min., c-27 Min.
09 Selection of none, one or more things when given things are different or identical, Total number of divisors,
Total number of proper divisors, Sum of total divisors, Number of ways in which a number (N) can be resolved
as a product of two factors which are relatively prime or co-prime.
 a-48 Min., b-45 Min., c-14 Min.
10 Multinomial theorem of permutation and combination, Beggar’s Method  a-45 Min., b-43 Min.
11 Questions based on multinomial theorem, Dearrangement of n different things.  a-31 Min., b-23 Min.
12 Miscellaneous questions  a-33 Min., b-34 Min.
13 Miscellaneous questions a-30 Min., b-17 Min.

Limit, Continuity and Differentiability
Topic / Faculty Lecture Details Buy
Limit, Continuity and Differentiability
By Renu Mam
No Of Lect. 15 Demo
Lecture# Description Duration
01 (a) Concept of Limit, Left Hand Side Limit (LHL) and Right Hand Side Limit (RHL) , Algebra on limits
(b) 7 Indeterminant forms, Steps to determining limit of a function when x→a, where to evaluate LHL & RHL separately (Doubtful points)

(a) 52 Minutes

(b) 36 Minutes

02 (a) Identify type of indeterminant forms, Method of solving Limits
(i) Factorisation (ii) Rationalization
(b) Questions on factorisation and Rationalisation
 (a-50 Min., b-25 Min.)
03 (a) M-3- Evaluate of limit when x →∞ or x→ –∞
(b) Questions based on method no.3
 (a-34 Min., b-33 Min.)
04 (a) M-4- Series expansion by Maclaurin’s Series, Series Expansion of Basic functions,
(b) Determining unknown parameters by series expansion.
M-5- Standard - Limits
(a-37 Min., b-27 Min.)
05 (a) Formulae of standard-limits, Questions based on standard limits.
(b) Standard limits using substitution method.
M-6- Limit in form of 1
 (a-47 Min., b-28 Min.)
06 (a) Questions on 1 form. L’Hospital’s rule (LH-Rule).
(b) Questions based on LH-Rule
 (a-36 Min., b-22 Min.)
07 (a) 0° or ∞° forms.
(b) Miscellaneous questions of limit
(a-41 Min., b-36 Min.)
08 Sandwitch Theorem ( or Squeeze - Play Theorem)
Continuity of a function y = f(x) at point x = a
Types of discontinuity:
(1) First kind of discontinuity (removable discontinuity) (In this case limit exist)
(A) Missing point discontinuity.
(B) Isolated point discontinuity.
(2) Non-Removable Discontinuity (Limit does not exist)
(A) Finite Non-removable discontinuity, Jump of discontinuity = | RHL – LHL |
(B) Infinite Non-removable discontinuity.
(C) Oscillating discontinuity.
Jump of discontinuity = | RHL – LHL |
 55 Minutes
09 (a, b) Continuity at a point,
Continuity in an interval, determining unknown parameters using concept of continuity at a point.
 (a-32 Min., b-18 Min.)
10 (a, b) Differentiability of a function at a point, Equation of tangent at a point,
Questions to check continuity and differentiability at a point
 (a-45 Min., b-20 Min.)
11 (a) Determining unknown parameters using concepts of continuity and differentiability at a point.
Continuity and differentiability of higher order derivatives.
(b) Questions based on LH rule and differentiation.
 (a-38 Min., b-30 Min.)
12 (a, b) Differentiability in an interval, questions based to check continuity and differentiability in an interval.  (a-29 Min., b-27 Min.)
13 (a) Graphical method to check differentiability,
Differentiability of maximum-minimum of two or more than 2 functions.
(b) Graphical method to check differentiability
 (a-32 Min., b-30 Min.)
14 (a) Determination of a function using differentiation
(b) Miscellaneous questions based on LCD.
(a-25 Min., b-24 Min.)
15 (a, b) Miscellaneous questions based on LCD.  (a-33 Min., b-34 Min.)
PAY 1000
Inorganic and Physical chemistry
Naveen Verma (NV Sir)

Naveen Verma (NV Sir)

B.Tech. IIT Delhi
About Faculty
Organic chemistry
Vinay Kumar Pandey (VKP Sir)

Vinay Kumar Pandey (VKP Sir)

About Faculty
Sushil Kumar Sinha (SSI Sir)

Sushil Kumar Sinha (SSI Sir)

B. Tech. IIT Delhi
About Faculty
Arvind Singh (AS Sir)

Arvind Singh (AS Sir)

B.Tech IIT Guwahati
About Faculty