JEE 2026

JEE 2026

JEE Main & Advanced step-by-step solutions — Physics, Chemistry, Maths

Topic Guides

Acids Bases — Concepts, Formulas & Examples

Acids, bases, pH, neutralisation and indicators — CBSE Class 10 and 11. Acids and bases are two of the most fundamental categories in chemistry.

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Alcohols Phenols Ethers — Concepts, Reactions & Solved Examples

Complete guide to alcohols phenols ethers for Class 12. Solved examples, exam tips, PYQs. Alcohols, phenols, and ethers all carry an oxygen atom, but their…

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Alcohols — Concepts, Formulas & Examples

Structure, properties, preparation and reactions of alcohols. Alcohols are organic compounds with an OH group attached to a carbon atom.

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Aldehydes Ketones Carboxylic Acids — Concepts, Reactions & Solved Examples

Complete guide to aldehydes ketones carboxylic acids for Class 12. Solved examples, exam tips, PYQs. Built for JEE & NEET & CBSE prep. Free guide on doubts.ai.

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Amines — Concepts, Reactions & Solved Examples

Complete guide to amines for Class 12. Solved examples, exam tips, PYQs. Amines are organic compounds derived from ammonia (NH₃) by replacing one, two, or…

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Aromatic Compounds — Benzene, Resonance, and Substitution

Master aromatic compounds with conceptual clarity, solved examples, and exam strategies. The word 'aromatic' originally referred to sweet-smelling compounds…

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Atomic Models — Concepts, Formulas & Examples

Development of atomic models from Dalton to quantum mechanical. Atomic models trace the evolution of our understanding of the atom. Free guide on doubts.ai.

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Atomic Structure — Bohr's Model, Quantum Numbers for Class 11

Rutherford and Bohr models, quantum numbers, orbitals, electronic configuration, Aufbau principle, Hund's rule, Pauli exclusion. NCERT Class 11 Chapter 2.

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Carbohydrates, Proteins, and Fats — The Chemistry of Food

Master carbohydrates, proteins, and fats with conceptual clarity, solved examples, and exam strategies. Biomolecules are the chemicals of life.

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Carbon — Concepts, Formulas & Examples

Carbon and its compounds — bonding, catenation and importance in life. Carbon is the central element of organic chemistry and life itself.

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Catenation — Concepts, Formulas & Examples

The ability of carbon to form long chains — why carbon is unique. Catenation is the self-linking of atoms of an element to form chains, rings and branched…

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Molecular Geometry and VSEPR Theory

Master molecular geometry and vsepr theory with conceptual clarity, solved examples, and exam strategies. Built for JEE & NEET & CBSE prep.

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Chemical Bonding — Ionic, Covalent & Metallic Bonds Explained

Chemical bonding types, VSEPR theory, hybridization, MOT. CBSE, JEE, NEET with solved examples. Why do atoms bond at all? Built for JEE & NEET & CBSE prep.

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Chemical Thermodynamics — Why Reactions Happen

Master chemical thermodynamics with conceptual clarity, solved examples, and exam strategies. Why does iron rust but gold doesn't? Free guide on doubts.ai.

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Chemistry of Soaps and Detergents

Master chemistry of soaps and detergents with conceptual clarity, solved examples, and exam strategies. Built for JEE & NEET & CBSE prep.

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Chemistry of Medicines — How Drugs Work

Master chemistry of medicines with conceptual clarity, solved examples, and exam strategies. Every medicine you've ever taken — paracetamol, aspirin…

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Colligative Properties — Boiling Point, Freezing Point, Osmosis

Master colligative properties with conceptual clarity, solved examples, and exam strategies. Dissolve salt in water and it boils at a higher temperature.

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Colloids — Concepts, Formulas & Examples

Colloidal solutions, types, properties and Tyndall effect. A colloid is a mixture in which one substance is dispersed in another at particle size between 1 and…

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Coordination Compounds — Concepts, Reactions & Solved Examples

Complete guide to coordination compounds for Class 12. Solved examples, exam tips, PYQs. Take a copper sulphate solution. Now add excess ammonia.

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Crystal Field Theory — Why Transition Metal Compounds Are Colourful

Master crystal field theory with conceptual clarity, solved examples, and exam strategies. When white light hits a solution of copper sulphate, the solution…

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D And F Block Elements — Concepts, Reactions & Solved Examples

Complete guide to d and f block elements for Class 12. Solved examples, exam tips, PYQs. The d and f block elements sit in the middle of the periodic table and…

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Stoichiometry Problem Solving — The Mole Road Map

Master stoichiometry problem solving with conceptual clarity, solved examples, and exam strategies. When we burn magnesium, how much oxygen do we need?

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Electrochemistry Strategy — Concepts, Formulas & Examples

How to approach electrochemistry problems and Nernst equation for JEE and NEET. Electrochemistry is one of the most problem-heavy chapters in physical…

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Electronegativity — Concepts, Formulas & Examples

Electronegativity trends across the periodic table and its effects. Electronegativity is the tendency of an atom to attract shared electrons in a chemical bond.

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Enzymes — Concepts, Formulas & Examples

Enzymes as biological catalysts — structure, function and kinetics. Enzymes are protein catalysts that speed up biochemical reactions by factors of millions.

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Equations — Concepts, Formulas & Examples

Balancing chemical equations and interpreting them. Chemical equations are the language of reactions. Balancing them is a core skill. Free guide on doubts.ai.

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Everyday Chemistry — Concepts, Formulas & Examples

Chemistry in everyday life — soaps, detergents, drugs and food. Chemistry is not just in labs. Soaps, detergents, drugs, food additives, cosmetics, cleaners…

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Chemical Equilibrium — Le Chatelier's Principle & Kp, Kc (Class 11)

Reversible reactions, equilibrium constant Kc and Kp, Le Chatelier's principle, factors affecting equilibrium, ionic equilibrium. NCERT Class 11 Chapter 7.

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F Block — Concepts, Formulas & Examples

Lanthanides and actinides — properties, trends and applications. The f-block elements are the two rows at the bottom of the periodic table.

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Functional Groups — The Personality of Organic Molecules

Master functional groups with conceptual clarity, solved examples, and exam strategies. Organic chemistry has millions of compounds, but they don't all behave…

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Gas Laws — Boyle, Charles, Avogadro, and the Ideal Gas

Master gas laws with conceptual clarity, solved examples, and exam strategies. Gases behave very differently from solids and liquids. Free guide on doubts.ai.

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Grignard Reagents and Organometallic Chemistry

Master grignard reagents and organometallic chemistry with conceptual clarity, solved examples, and exam strategies. Built for JEE & NEET & CBSE prep.

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Haloalkanes Haloarenes — Concepts, Reactions & Solved Examples

Complete guide to haloalkanes haloarenes for Class 12. Solved examples, exam tips, PYQs. When a hydrogen atom in an alkane or arene is replaced by a halogen…

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How to Balance Chemical Equations — Systematic Methods

Master how to balance chemical equations with conceptual clarity, solved examples, and exam strategies. Built for JEE & NEET & CBSE prep.

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IUPAC Naming — A Systematic Approach to Organic Chemistry

Master iupac naming with conceptual clarity, solved examples, and exam strategies. IUPAC (International Union of Pure and Applied Chemistry) naming gives every…

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Hydrocarbons — Concepts, Reactions & Solved Examples

Complete guide to hydrocarbons for Class 11. Solved examples, exam tips, PYQs. Organic chemistry starts here. Built for JEE & CBSE prep.

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Hydrogen — Concepts, Reactions & Solved Examples

Complete guide to hydrogen for Class 11. Solved examples, exam tips, PYQs. Hydrogen sits at position 1 on the periodic table, but don't let that fool you —…

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Industrial Chemistry — Concepts, Formulas & Examples

Major industrial processes — Haber, Contact, Ostwald and Solvay. Industrial chemistry is how chemical knowledge becomes economically useful.

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Ionic Bonding — Concepts, Formulas & Examples

Ionic bond formation, lattice energy and properties of ionic compounds. Ionic bonding is the complete transfer of electrons from one atom to another, forming…

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Ionic Equilibrium — pH, Buffers, Solubility Product

Master ionic equilibrium with conceptual clarity, solved examples, and exam strategies. When an ionic compound dissolves in water, it dissociates into ions.

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Isomerism — Structural, Geometric, Optical

Master isomerism with conceptual clarity, solved examples, and exam strategies. Isomers are compounds with the same molecular formula but different…

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Kinetics — Concepts, Formulas & Examples

Chemical kinetics — rate, order, rate constant and Arrhenius equation. Chemical kinetics studies the rates of chemical reactions and the factors affecting them.

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Extraction of Metals — Reduction, Electrolysis, Refining

Master extraction of metals with conceptual clarity, solved examples, and exam strategies. Metals don't exist as pure elements in nature (with rare exceptions…

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The Mole Concept — Counting Atoms the Chemistry Way

Master the mole concept with conceptual clarity, solved examples, and exam strategies. Atoms and molecules are so small that we can't count them individually —…

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Mot — Concepts, Formulas & Examples

Molecular orbital theory — bonding in diatomic molecules. Molecular orbital (MO) theory explains bonding by combining atomic orbitals to form molecular…

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Named Reactions — The 20 You Must Know

Master named reactions with conceptual clarity, solved examples, and exam strategies. Named reactions in organic chemistry are reactions discovered or…

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Named Reactions — Concepts, Formulas & Examples

Important named reactions in organic chemistry — Wurtz, Kolbe, Cannizzaro and more. Named reactions are classic reactions identified with their discoverers.

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Noble Gases — Not So Inert After All

Master noble gases with conceptual clarity, solved examples, and exam strategies. Group 18 elements — helium, neon, argon, krypton, xenon, and radon — were…

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Nuclear Chemistry — Fission, Fusion, and Radioactivity

Master nuclear chemistry with conceptual clarity, solved examples, and exam strategies. Nuclear chemistry deals with changes in atomic nuclei — the tiny, dense…

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Organic Chemistry Basics — Hybridisation, IUPAC, Isomerism for Class 11

sp3/sp2/sp hybridisation, IUPAC nomenclature, structural and stereoisomerism, homologous series, functional groups. NCERT Class 11 Chapter 12–13.

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P Block Elements — Concepts, Reactions & Solved Examples

Complete guide to p block elements for Class 11, Class 12. Solved examples, exam tips, PYQs. The p block is where chemistry gets genuinely interesting.

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Periodic Table — Trends, Properties & Memory Tricks

Periodic table trends: atomic radius, ionization energy, electronegativity. Memory tricks for CBSE, JEE, NEET. Built for JEE & NEET & CBSE prep.

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Polarity — Concepts, Formulas & Examples

Molecular polarity, dipole moment and solvent effects. Polarity describes how electron density is distributed in a molecule. Built for JEE & NEET & CBSE prep.

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Qualitative Analysis — Identifying Ions and Salts

Master qualitative analysis with conceptual clarity, solved examples, and exam strategies. Qualitative analysis is the systematic process of determining which…

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Reaction Mechanisms — Arrow Pushing for Beginners

Master reaction mechanisms with conceptual clarity, solved examples, and exam strategies. Understanding reaction mechanisms means understanding WHY reactions…

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Reaction Mechanisms — Concepts, Formulas & Examples

Mechanism of common organic reactions — SN, E, addition. A reaction mechanism is the step-by-step description of how bonds break and form during a reaction.

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Real Gases — Concepts, Formulas & Examples

Real Gases for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Redox Reactions — Oxidation State, Balancing & Electrochemistry (Class 11)

Oxidation and reduction, oxidation number rules, half-reaction method, balancing redox reactions, electrochemical cells. NCERT Class 11 Chapter 8.

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Redox Titration — Concepts, Formulas & Examples

Redox Titration for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Redox — Concepts, Formulas & Examples

Redox for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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S Block — Concepts, Formulas & Examples

S Block for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Salt Hydrolysis — Why Some Salts Are Acidic or Basic

Master salt hydrolysis with conceptual clarity, solved examples, and exam strategies. Most people assume all salts give neutral solutions.

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Solid State — Crystal Structures, Packing, Defects

Master solid state with conceptual clarity, solved examples, and exam strategies. Everything you touch is in the solid state. Built for JEE & NEET & CBSE prep.

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Solid State — Concepts, Formulas & Examples

Solid State for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Solids — Concepts, Formulas & Examples

Solids for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Solutions — Concepts, Reactions & Solved Examples

Complete guide to solutions for Class 12. Solved examples, exam tips, PYQs. When salt dissolves in water, something interesting happens — the sodium and…

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States of Matter — Kinetic Theory, Gas Laws for Class 11

Boyle's law, Charles' law, Avogadro's law, ideal gas equation, kinetic theory, van der Waals equation, liquefaction. NCERT Class 11 Chapter 5.

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States — Concepts, Formulas & Examples

States for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Surface Chemistry — Adsorption, Catalysis, Colloids, Emulsions

Surface Chemistry — Adsorption, Catalysis, Colloids, Emulsions Surface chemistry studies phenomena occurring at interfaces — between solid-gas, solid-liquid…

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Thermodynamics Chemistry — Enthalpy, Entropy & Gibbs Free Energy (Class 11)

System and surroundings, enthalpy change, Hess's law, entropy, Gibbs free energy, spontaneity. NCERT Class 11 Chemistry Chapter 6. Free guide on doubts.ai.

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Transition Metals — Concepts, Formulas & Examples

Transition Metals for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Transition — Concepts, Formulas & Examples

Transition for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Zeolites — Concepts, Formulas & Examples

Zeolites for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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AC Circuits — Impedance, Resonance, Power Factor

Understand ac circuits from first principles with intuitive explanations and solved problems. AC circuits power the electricity in your home, the radio on your…

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Atoms — Concepts, Formulas & Solved Numericals

Complete guide to atoms for Class 12. Solved examples, exam tips, PYQs. Rutherford's gold foil experiment in 1909 shattered the 'plum pudding' model and gave…

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Bohr's Model — How Electrons Orbit

Understand bohr's model from first principles with intuitive explanations and solved problems. By 1913, physicists were in trouble. Free guide on doubts.ai.

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Calorimetry — Measuring Heat Transfer

Understand calorimetry from first principles with intuitive explanations and solved problems. Before we measure heat, we need to know what it is.

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Capacitors — Storing and Releasing Charge

Understand capacitors from first principles with intuitive explanations and solved problems. A capacitor is the simplest device that stores electrical energy —…

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Center of Mass — Finding the Balance Point

Understand center of mass from first principles with intuitive explanations and solved problems. Balance a ruler on your fingertip — the point where it…

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Circular Motion — Why Things Move in Circles

Understand circular motion from first principles with intuitive explanations and solved problems. Newton's first law says an object moves in a straight line at…

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Collisions and Momentum — Elastic, Inelastic, and Everything Between

Understand collisions and momentum from first principles with intuitive explanations and solved problems. Built for JEE & NEET & CBSE prep.

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Dimensional Analysis — Deriving and Checking Formulas

Understand dimensional analysis from first principles with intuitive explanations and solved problems. Built for JEE & NEET & CBSE prep.

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Doppler Effect — Why Pitch Changes

Understand doppler effect from first principles with intuitive explanations and solved problems. You've heard it: an ambulance approaches with a high-pitched…

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Dual Nature Of Matter — Concepts, Formulas & Solved Numericals

Complete guide to dual nature of matter for Class 12. Solved examples, exam tips, PYQs. Light behaves like a wave — it diffracts, interferes, and shows…

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Elasticity — Stress, Strain, and Young's Modulus

Understand elasticity from first principles with intuitive explanations and solved problems. Pull a rubber band and release it — it snaps back.

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Electromagnetic Waves — The Entire Spectrum

Understand electromagnetic waves from first principles with intuitive explanations and solved problems. Built for JEE & NEET & CBSE prep.

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Electrostatics — Coulomb's Law, Electric Field & Potential for Class 12

Coulomb's law, electric field lines, electric potential, capacitors, Gauss's law applications. NCERT Class 12 Chapter 1–2 with JEE-level examples.

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Fluid Mechanics — Pressure, Buoyancy, and Flow

Understand fluid mechanics from first principles with intuitive explanations and solved problems. A fluid is any substance that can flow and takes the shape of…

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Heat Transfer — Conduction, Convection, Radiation

Understand heat transfer from first principles with intuitive explanations and solved problems. Heat always flows from a hotter body to a cooler one — never…

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How to Draw Free Body Diagrams — A Step-by-Step Method

Understand how to draw free body diagrams from first principles with intuitive explanations and solved problems. Built for JEE & NEET & CBSE prep.

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Interference and Diffraction — When Waves Overlap

Understand interference and diffraction from first principles with intuitive explanations and solved problems. Built for JEE & NEET & CBSE prep.

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Kinematics — Motion in One & Two Dimensions

Kinematics from scratch: equations of motion, projectile motion, relative velocity. CBSE, JEE solved numericals. Built for JEE & CBSE prep.

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Magnetism — Concepts, Formulas & Solved Numericals

Complete guide to magnetism for Class 12. Solved examples, exam tips, PYQs. Magnetism shows up everywhere in Class 12 — from the force on a current-carrying…

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Magnetic Effects of Current — Oersted to Ampere

Understand magnetic effects of current from first principles with intuitive explanations and solved problems. Built for JEE & NEET & CBSE prep.

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Modern Physics — Concepts, Formulas & Solved Numericals

Complete guide to modern physics for Class 12. Solved examples, exam tips, PYQs. Modern physics is everything that came after classical mechanics broke down in…

Physics cbsejee-mainjee-advanced

Newton's Laws of Motion — Concepts, Numericals & Exam Tips

Complete guide to Newton's three laws. Free body diagrams, friction, tension for CBSE, JEE, NEET. Newton's Laws of Motion carry serious weightage in every…

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Nuclei — Concepts, Formulas & Solved Numericals

Complete guide to nuclei for Class 12. Solved examples, exam tips, PYQs. The nucleus sits at the heart of every atom, occupying roughly m — about the size of…

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Oscillations — SHM, Energy & Pendulum for Class 11

Simple harmonic motion, restoring force, amplitude, time period, frequency, energy in SHM, simple pendulum, spring-mass system. NCERT Class 11 Chapter 14.

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Photoelectric Effect — The Experiment That Changed Physics

Understand photoelectric effect from first principles with intuitive explanations and solved problems. Built for JEE & NEET & CBSE prep.

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Physics in Everyday Life — From Cars to Cooking

Understand physics in everyday life from first principles with intuitive explanations and solved problems. Built for JEE & NEET & CBSE prep.

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Physics Problem Solving — Strategies That Actually Work

Understand physics problem solving from first principles with intuitive explanations and solved problems. Built for JEE & NEET & CBSE prep.

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Projectile Motion — From Basics to Tricky Problems

Understand projectile motion from first principles with intuitive explanations and solved problems. When you throw a ball at an angle, it follows a curved path…

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Radioactivity — Alpha, Beta, Gamma and Half-Life

Understand radioactivity from first principles with intuitive explanations and solved problems. Radioactivity is the spontaneous disintegration of an unstable…

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Ray Optics — Concepts, Formulas & Solved Numericals

Complete guide to ray optics for Class 12. Solved examples, exam tips, PYQs. Light travels in straight lines. Built for JEE & NEET & CBSE prep.

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Rotational Motion — Concepts, Formulas & Solved Numericals

Complete guide to rotational motion for Class 11. Solved examples, exam tips, PYQs. When a cricket ball spins in the air or a spinning top refuses to fall…

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Significant Figures and Error Analysis

Understand significant figures and error analysis from first principles with intuitive explanations and solved problems. No measuring instrument is perfect.

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Simple Harmonic Motion — Springs, Pendulums, and Beyond

Understand simple harmonic motion from first principles with intuitive explanations and solved problems. Built for JEE & NEET & CBSE prep.

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Thermal Expansion — Why Things Get Bigger When Hot

Understand thermal expansion from first principles with intuitive explanations and solved problems. Almost every material expands when heated and contracts…

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Thermodynamics — Laws, Processes & Efficiency for Class 11

Zeroth, first and second laws of thermodynamics, internal energy, heat, work, isothermal, adiabatic, isobaric, isochoric processes. NCERT Class 11.

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Unit Conversion — SI, CGS, and Everything Between

Understand unit conversion from first principles with intuitive explanations and solved problems. Every physical measurement has two parts: a number and a unit.

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Wave Optics — Concepts, Formulas & Solved Numericals

Complete guide to wave optics for Class 12. Solved examples, exam tips, PYQs. When Newton said light was a stream of particles, he wasn't entirely wrong — but…

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Waves — Transverse, Longitudinal, Speed & Superposition for Class 11

Types of waves, wave speed, wavelength, frequency, superposition principle, standing waves, beats, Doppler effect. NCERT Class 11 Chapter 15.

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3D Geometry — Complete Guide with Solved Examples

Complete guide to 3d geometry for Class 12. Solved examples, exam tips, PYQs. Three-dimensional geometry feels abstract until the moment it clicks.

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3D Shapes — Concepts, Formulas & Examples

3d Shapes for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Algebra Basics — Concepts, Formulas & Examples

Algebra Basics for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Angle Relations — Concepts, Formulas & Examples

Angle Relations for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Angles — Concepts, Formulas & Examples

Angles for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Application Of Derivatives — Complete Guide with Solved Examples

Complete guide to application of derivatives for Class 12. Solved examples, exam tips, PYQs. Here's the thing most textbooks miss: derivatives were invented to…

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Application Of Integrals — Complete Guide with Solved Examples

Complete guide to application of integrals for Class 12. Solved examples, exam tips, PYQs. Integration gives us areas. Built for JEE & CBSE prep.

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Applications Of Trig — Concepts, Formulas & Examples

Applications Of Trig for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Area Under Curves — Why Integration Works

Learn area under curves with clear explanations, worked examples, and practice problems. Why can an integral compute area? Built for JEE & NEET & CBSE prep.

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Area — Concepts, Formulas & Examples

Area for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Arithmetic — Concepts, Formulas & Examples

Arithmetic for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Binomial Theorem — Complete Guide with Solved Examples

Complete guide to binomial theorem for Class 11. Solved examples, exam tips, PYQs. The binomial theorem gives us a formula to expand expressions of the form…

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Binomial — Concepts, Formulas & Examples

Binomial for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Bpt — Concepts, Formulas & Examples

Bpt for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Calculus Strategy — Concepts, Formulas & Examples

Calculus Strategy for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Circles Equations — Concepts, Formulas & Examples

Circles Equations for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Commercial Maths — Concepts, Formulas & Examples

Commercial Maths for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Common Algebraic Identities — The Ones That Keep Showing Up

Learn common algebraic identities with clear explanations, worked examples, and practice problems. Algebraic identities are equations that hold true for all…

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Complex Numbers — Argument, Modulus & Polar Form for Class 11

Real and imaginary parts, conjugate, modulus, argument, polar form. Euler's form. NCERT Class 11 Chapter 5 with JEE-level problems. Built for JEE & CBSE prep.

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Conditional Probability — When Context Changes Everything

Learn conditional probability with clear explanations, worked examples, and practice problems. Probability already feels tricky. Free guide on doubts.ai.

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Congruence — Concepts, Formulas & Examples

Congruence for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Conic Sections — Complete Guide with Solved Examples

Complete guide to conic sections for Class 11. Solved examples, exam tips, PYQs. Take a double cone — two ice cream cones joined tip-to-tip — and slice through…

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Conics — Concepts, Formulas & Examples

Conics for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

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Coordinate Geometry — Straight Lines Deep Dive

Learn coordinate geometry with clear explanations, worked examples, and practice problems. A straight line is the simplest curve — yet coordinate geometry…

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Counting Principles — Fundamental Rule, Pigeonhole, Inclusion-Exclusion

Learn counting principles with clear explanations, worked examples, and practice problems. Counting is deceptively simple — until you need to count large…

Mathematics cbsejee-mainneet

Counting — Concepts, Formulas & Examples

Counting for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Data Viz — Concepts, Formulas & Examples

Data Viz for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

De Strategy — Concepts, Formulas & Examples

De Strategy for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Definite Integrals — Concepts, Formulas & Examples

Definite Integrals for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Determinants — Concepts, Formulas & Examples

Determinants for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Differential Equations — Complete Guide with Solved Examples

Complete guide to differential equations for Class 12. Solved examples, exam tips, PYQs. A differential equation is any equation that contains a derivative.

Mathematics cbsejee-mainjee-advanced

Differentiation — Concepts, Formulas & Examples

Differentiation for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Dimensional Analysis — Checking Answers by Units

Learn dimensional analysis with clear explanations, worked examples, and practice problems. A student derives a formula for the time period of a pendulum as…

Mathematics cbsejee-mainneet

Estimation and Approximation — When Exact Answers Aren't Needed

Learn estimation and approximation with clear explanations, worked examples, and practice problems. Estimation is one of those skills that textbooks undervalue…

Mathematics cbsejee-mainneet

Euclid — Concepts, Formulas & Examples

Euclid for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Expected Value and Variance — What Averages Really Mean

Learn expected value and variance with clear explanations, worked examples, and practice problems. If you roll a fair die many times, you don't always get a…

Mathematics cbsejee-mainneet

Exponents — Concepts, Formulas & Examples

Exponents for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Frustum — Concepts, Formulas & Examples

Frustum for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Functions and Graphs — Reading, Sketching, Transforming

Learn functions and graphs with clear explanations, worked examples, and practice problems. A function is a rule that assigns to each input exactly one output.

Mathematics cbsejee-mainneet

Functions — Concepts, Formulas & Examples

Functions for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

How to Approach Word Problems — A Thinking Framework

Learn how to approach word problems with clear explanations, worked examples, and practice problems. Built for JEE & NEET & CBSE prep. Free guide on doubts.ai.

Mathematics cbsejee-mainneet

Indefinite Integrals — Concepts, Formulas & Examples

Indefinite Integrals for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Induction — Concepts, Formulas & Examples

Induction for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Inequalities — Linear, Quadratic, and Absolute Value

Learn inequalities with clear explanations, worked examples, and practice problems. In school, we spend most time on equations — finding exact values.

Mathematics cbsejee-mainneet

Integrals — Complete Guide with Solved Examples

Complete guide to integrals for Class 12. Solved examples, exam tips, PYQs. If differentiation asks 'how fast is this changing?', integration asks 'how much…

Mathematics cbsejee-mainjee-advanced

Integration Strategy — Concepts, Formulas & Examples

Integration Strategy for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Inverse Trig — Concepts, Formulas & Examples

Inverse Trig for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Limits And Derivatives — Complete Guide with Solved Examples

Complete guide to limits and derivatives for Class 11, Class 12. Solved examples, exam tips, PYQs. Most students see limits as a chapter of algebra tricks.

Mathematics cbsejee-main

Limits Strategy — Concepts, Formulas & Examples

Limits Strategy for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Linear 2 Var — Concepts, Formulas & Examples

Linear 2 Var for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Linear Graphs — Concepts, Formulas & Examples

Linear Graphs for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Linear Programming — Complete Guide with Solved Examples

Complete guide to linear programming for Class 12. Solved examples, exam tips, PYQs. Think of it this way: a factory makes two products. Built for CBSE prep.

Mathematics cbse

Locus — The Path a Point Traces

Learn locus with clear explanations, worked examples, and practice problems. A locus is the set of all points that satisfy a given condition — the path traced…

Mathematics cbsejee-mainneet

Logarithms — From Confusion to Clarity

Learn logarithms with clear explanations, worked examples, and practice problems. Logarithms exist because exponentiation creates big numbers very fast.

Mathematics cbsejee-mainneet

Mathematical Induction — Proving Infinite Truths

Learn mathematical induction with clear explanations, worked examples, and practice problems. How do you prove that a statement is true for every natural…

Mathematics cbsejee-mainneet

Mathematical Proof Techniques — Direct, Contradiction, Induction

Learn mathematical proof techniques with clear explanations, worked examples, and practice problems. Built for JEE & NEET & CBSE prep. Free guide on doubts.ai.

Mathematics cbsejee-mainneet

Matrices And Determinants — Complete Guide with Solved Examples

Complete guide to matrices and determinants for Class 12. Solved examples, exam tips, PYQs. Every Class 12 student has a moment where they wonder why matrices…

Mathematics cbsejee-main

Matrices Guide — Concepts, Formulas & Examples

Matrices Guide for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Matrices — Concepts, Formulas & Examples

Matrices for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Maxima and Minima — Optimizing Real Situations

Learn maxima and minima with clear explanations, worked examples, and practice problems. Maxima and minima problems are asking a single question: at what input…

Mathematics cbsejee-mainneet

Means — Concepts, Formulas & Examples

Means for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Modular Arithmetic — The Maths of Remainders

Learn modular arithmetic with clear explanations, worked examples, and practice problems. Modular arithmetic is the mathematics of remainders — and it shows up…

Mathematics cbsejee-mainneet

Modular — Concepts, Formulas & Examples

Modular for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Monotonicity — Concepts, Formulas & Examples

Monotonicity for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Number Sense — Building Intuition with Numbers

Learn number sense with clear explanations, worked examples, and practice problems. Number sense is the ability to understand numbers deeply — their…

Mathematics cbsejee-mainneet

Number Systems — Concepts, Formulas & Examples

Number Systems for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Number Types — Concepts, Formulas & Examples

Number Types for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Numbers — Concepts, Formulas & Examples

Numbers for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Optimization — Concepts, Formulas & Examples

Optimization for CBSE, JEE and NEET — core concepts, must-know formulas, worked examples and common mistakes, written by an experienced Indian tutor.

Mathematics cbsejee-main

Partial Fractions — Breaking Complicated Fractions Apart

Learn partial fractions with clear explanations, worked examples, and practice problems. Integrating directly is hard. Built for JEE & NEET & CBSE prep.

Mathematics cbsejee-mainneet

Pattern Recognition in Maths — Seeing What Others Miss

Learn pattern recognition in maths with clear explanations, worked examples, and practice problems. Pattern recognition is the skill of finding a rule in a…

Mathematics cbsejee-mainneet

Permutations and Combinations — Counting Principles for Class 11

Fundamental counting principle, factorial, permutations (nPr), combinations (nCr), word arrangements. NCERT Class 11 with JEE application problems.

Mathematics cbsejee-main

Probability — Basics to Bayes Theorem for CBSE & JEE

Probability concepts from basic to advanced: classical, conditional, Bayes theorem. CBSE, JEE, SAT. Probability is one of those topics where students either…

Mathematics cbsejee-mainsat-math

Quadratic Equations — Complete Guide with Solved Examples

Learn quadratic equations from basics to advanced. Formula, discriminant, factoring methods with solved examples for CBSE, JEE, SAT. Free guide on doubts.ai.

Mathematics cbsejee-mainsat-math

Rate of Change — The Idea Behind Derivatives

Learn rate of change with clear explanations, worked examples, and practice problems. When you watch a car's speedometer, you're watching rate of change.

Mathematics cbsejee-mainneet

Sequences and Series — AP, GP, AGP & Special Sums for Class 11

Arithmetic and geometric progressions, sum of n terms, infinite GP, sum of squares and cubes. NCERT Class 11 Chapter 9 with JEE shortcuts.

Mathematics cbsejee-main

Sets And Relations — Complete Guide with Solved Examples

Complete guide to sets and relations for Class 11. Solved examples, exam tips, PYQs. Sets form the language of modern mathematics. Built for JEE & CBSE prep.

Mathematics cbsejee-main

Similarity and Congruence — Why Shapes Match

Learn similarity and congruence with clear explanations, worked examples, and practice problems. Two triangles can relate to each other in two fundamentally…

Mathematics cbsejee-mainneet

Straight Lines — Complete Guide with Solved Examples

Complete guide to straight lines for Class 11. Solved examples, exam tips, PYQs. Geometry in Class 11 feels like a fresh start — suddenly we're not just…

Mathematics cbsejee-main

Summation Techniques — Sigma Notation and Telescoping

Learn summation techniques with clear explanations, worked examples, and practice problems. Adding up long sequences of numbers by hand is impractical.

Mathematics cbsejee-mainneet

Symmetry — Line, Rotational, and Point Symmetry

Learn symmetry with clear explanations, worked examples, and practice problems. Symmetry is the mathematical language of balance. Free guide on doubts.ai.

Mathematics cbsejee-mainneet

Transformations — Reflection, Rotation, Translation, Dilation

Learn transformations with clear explanations, worked examples, and practice problems. A geometric transformation is a rule that moves, flips, stretches, or…

Mathematics cbsejee-mainneet

Trigonometry — Formulas, Identities & Solved Problems

Master trigonometry: ratios, identities, equations, height and distance. CBSE Class 10-12, JEE Main, NEET solved examples. Built for JEE & NEET & CBSE prep.

Mathematics cbsejee-mainneet

Vectors — Complete Guide with Solved Examples

Complete guide to vectors for Class 12. Solved examples, exam tips, PYQs. A vector is a quantity that has both magnitude and direction. Free guide on doubts.ai.

Mathematics cbsejee-main

Solved Questions

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Add 2/5 and 1/5 — Adding Like Fractions Step by Step

Mathematics · Fractions · NCERT Class 6 Chapter 7

easy
What is (-3) + (-5)? — Adding Two Negative Integers

Mathematics · Integers · NCERT Class 7 Chapter 1

easy
easy
Probability of At Least One Head in 3 Coin Tosses

Mathematics · Probability · CBSE 2024 Board Exam

easy
easy
Why Do Shoes Have Grooves on the Sole?

Physics · Friction · NCERT Class 8

easy
Area Between y = x² and y = x

Mathematics · Application Of Integrals · CBSE 2024 Board Exam

medium
Convert 3/5 to Percentage

Mathematics · Percentage · NCERT Class 7

easy
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easy
medium
hard
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Show Total Energy in SHM is Constant — E = ½kA²

Physics · Oscillations · NCERT Class 11 Chapter 14

hard
What are Beats? Two Tuning Forks at 440 Hz and 444 Hz

Physics · Waves · NCERT Class 11 Chapter 15

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Write the Expression for Kc of N₂ + 3H₂ ⇌ 2NH₃

Chemistry · Equilibrium · NCERT Class 11 Chapter 7

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easy
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What is i^47? — Powers of i and the Cycle of Four

Mathematics · Complex Numbers · NCERT Class 11 Chapter 5

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If z = 2 + 3i, Find z̄ and |z|

Mathematics · Complex Numbers · NCERT Class 11

easy
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Faraday's Laws of Electrolysis

Chemistry · Electrochemistry · NCERT Class 12

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Osmotic Pressure — π = iCRT

Chemistry · Solutions · CBSE 2024 Board Exam

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Impedance of an LCR Circuit

Physics · Alternating Current · JEE Main 2024

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Transformer — Step Up and Step Down

Physics · Alternating Current · CBSE 2024 Board Exam

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Prism — Angle of Minimum Deviation

Physics · Ray Optics · JEE Main 2023

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Combination of Thin Lenses in Contact

Physics · Ray Optics · CBSE 2024 Board Exam

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easy
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Power of a Lens — P = 1/f in Diopters

Physics · Optics · CBSE 2024 Board Exam

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Radioactive Decay — Half-Life Problems

Physics · Modern Physics · CBSE 2024 Board Exam

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Resolving Power of a Microscope

Physics · Optics · JEE Advanced 2023

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Angle Between Two Lines m₁ and m₂

Mathematics · Straight Lines · JEE Main 2023

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Hyperbola — Asymptotes and Eccentricity

Mathematics · Conic Sections · JEE Advanced 2023

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Find Focus and Directrix of Parabola y² = 12x

Mathematics · Conic Sections · CBSE 2024 Board Exam

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Find the Middle Term of (1 + x)²⁰

Mathematics · Binomial Theorem · CBSE 2024 Board Exam

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Angle Between a Line and a Plane

Mathematics · 3d Geometry · CBSE 2025 Sample Paper

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Equation of Plane in Normal Form

Mathematics · 3d Geometry · JEE Main 2023

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Shortest Distance Between Two Skew Lines

Mathematics · 3d Geometry · JEE Main 2024

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Distance Between Two Points in 3D Space

Mathematics · 3d Geometry · NCERT Class 12

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Equation of Line Through Two Points in 3D

Mathematics · 3d Geometry · CBSE 2024 Board Exam

medium
medium
easy
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Section Formula in Vector Form — Divide in Ratio 2:3

Mathematics · Vectors · CBSE 2024 Board Exam

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Dot Product of Two Vectors — Find Angle Between Them

Mathematics · Vectors · CBSE 2024 Board Exam

easy
Find Magnitude of Vector 3î + 4ĵ

Mathematics · Vectors · NCERT Class 12

easy
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Find Inverse of a 2×2 Matrix

Mathematics · Matrices And Determinants · CBSE 2024 Board Exam

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Find the Particular Solution given y(0) = 1

Mathematics · Differential Equations · CBSE 2025 Sample Paper

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Variable Separable — dy/dx = y/x

Mathematics · Differential Equations · CBSE 2024 Board Exam

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Prove Product Rule for Derivatives

Mathematics · Limits And Derivatives · JEE Advanced 2023

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Derivative of x³ from First Principles

Mathematics · Limits And Derivatives · CBSE 2024 Board Exam

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Find dy/dx of sin(x²) — Chain Rule

Mathematics · Limits And Derivatives · CBSE 2024 Board Exam

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Integration by Partial Fractions — ∫dx/((x-1)(x+2))

Mathematics · Integrals · CBSE 2025 Sample Paper

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Evaluate ∫sin x dx from 0 to π

Mathematics · Integrals · CBSE 2024 Board Exam

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Integrate ∫x²dx — Basic Power Rule

Mathematics · Integrals · NCERT Class 12

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Integration by Parts — ∫x·eˣ dx

Mathematics · Integrals · JEE Main 2024

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