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  • Hydrocarbons

    Hydrocarbons
    2026/10/08
    Hydrocarbons, Class 11 Chemistry NCERT: quick revision in Hindi, about 11 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Classification of hydrocarbons: saturated, unsaturated and aromatic - Alkanes: CnH2n+2, chain isomerism and IUPAC naming - Wurtz reaction, free radical halogenation, combustion and aromatization - Preparing alkenes and alkynes: Lindlar catalyst, alcoholic KOH, sodamide - Alkenes: pi bond, Markovnikov's rule and the peroxide effect - Conformations of ethane: eclipsed vs staggered - Alkynes: sigma and pi bonds, acidity of terminal alkynes - Benzene: aromaticity, Huckel's rule, substitution and carcinogens Timestamps: 0:00 Introduction 0:20 Roadmap 0:52 Classification: saturated, unsaturated and aromatic 1:16 Common mistake: what saturated really means 1:39 Alkanes: general formula, isomerism and IUPAC naming 2:21 Alkane reactions: Wurtz, halogenation, combustion 3:23 Preparation of alkenes and alkynes 4:06 Quick quiz 1 4:32 Alkenes: sigma and pi bonds, Markovnikov's rule 5:36 Common mistake: conformations vs isomers 5:58 Quick quiz 2 6:31 Alkynes: triple bond and acidity of terminal alkynes 7:07 Benzene, aromaticity and Huckel's 4n + 2 rule 8:17 Quick quiz 3 8:51 Electrophilic substitution in benzene and carcinogens 9:31 Quick quiz 4 9:58 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    11 分
  • Organic Chemistry — Some Basic Principles and Techniques

    Organic Chemistry — Some Basic Principles and Techniques
    2026/10/07
    Organic Chemistry — Some Basic Principles and Techniques, Class 11 Chemistry NCERT: quick revision in Hindi, about 13 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Carbon's tetravalence and hybridization (sp3, sp2, sp) - Structural formulas: dash, condensed, bond-line, wedge-dash - Classification of compounds and homologous series - IUPAC nomenclature rules - Structural isomerism and stereoisomerism - Bond fission and electron displacement effects - Purification methods and qualitative/quantitative analysis Timestamps: 0:00 Introduction 0:26 Roadmap 0:56 Carbon's tetravalence and hybridization 1:57 Dash, condensed, bond-line and wedge-dash formulas 2:41 Mistakes in bond-line structures and pi bonds 3:02 Classification of organic compounds and homologous series 3:49 IUPAC nomenclature of organic compounds 4:42 Quick quiz 1 5:13 Structural isomerism and stereoisomerism 6:02 Quick quiz 2 6:27 Bond fission and curved arrow notation 7:09 Electron displacement effects in organic compounds 8:15 Mistakes in electron displacement effects 8:42 Quick quiz 3 9:03 Types of organic reactions and purification methods 10:03 Qualitative analysis of organic compounds 10:35 Acidifying before the halogen test 10:48 Quantitative analysis of organic compounds 11:40 Quick quiz 4 12:05 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    13 分
  • Redox Reactions

    Redox Reactions
    2026/10/06
    Redox Reactions, Class 11 Chemistry NCERT: quick revision in Hindi, about 14 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Classical definition of oxidation and reduction - Electron transfer definition and oxidizing/reducing agents - Activity series of metals: zinc-copper displacement - Oxidation number rules - Four types of redox reactions - Balancing redox equations - Redox titrations - Electrode potential and galvanic cells Timestamps: 0:00 Introduction 0:19 Roadmap 0:55 Classical definition of oxidation and reduction 1:39 Electron transfer definition of oxidation-reduction 2:40 Oxidizing agent vs reducing agent: the mix-up 3:08 Zinc and copper: activity series of metals 3:51 Oxidation number: rules and assignment 5:11 Quick quiz 1 5:54 Four types of redox reactions 7:11 Is every decomposition reaction a redox reaction? 7:50 Balancing redox equations: two methods 8:56 Quick quiz 2 9:40 Redox titrations and self-indicators 10:24 Limitations of oxidation number 10:53 Electrode potential and galvanic cells 12:15 Common mistakes: electrode potential sign and cell formula 12:36 Quick quiz 3 13:09 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    14 分
  • Equilibrium

    Equilibrium
    2026/10/04
    Equilibrium, Class 11 Chemistry NCERT Chapter 6: quick revision in Hindi, about 13 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Dynamic nature of physical and chemical equilibrium - Law of Mass Action and equilibrium constant Kc - Kp and heterogeneous equilibrium - Reaction quotient Q and predicting reaction direction - Le Chatelier's principle: concentration, pressure, temperature, catalyst - pH scale and ionic equilibrium of water - Weak acids, weak bases and salt hydrolysis - Buffers, solubility product Ksp and common ion effect Timestamps: 0:00 Introduction 0:19 Roadmap 0:52 Physical equilibrium: a dynamic balance 1:50 Chemical equilibrium is dynamic too 2:33 Quick quiz 1 2:58 Law of Mass Action and equilibrium constant Kc 3:44 Kp and heterogeneous equilibrium 4:42 Reaction quotient Q vs equilibrium constant K 5:35 Quick quiz 2 6:00 Le Chatelier's principle: concentration and pressure 7:07 Effect of temperature and catalyst on equilibrium 7:42 Three common mistakes about equilibrium 8:14 Ionic equilibrium and the pH scale 9:25 Weak acids, weak bases and salt hydrolysis 10:09 Quick quiz 3 10:32 Buffers, solubility product Ksp and common ion effect 11:38 Misconceptions about pH and buffers 11:58 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    13 分
  • Thermodynamics

    Thermodynamics
    2026/10/04
    Thermodynamics, Class 11 Chemistry NCERT Chapter 5: quick revision in Hindi, about 14 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - System, surroundings, and types of systems - State functions and internal energy - First law of thermodynamics - Enthalpy at constant pressure - Calorimetry: bomb and coffee-cup calorimeter - Reaction enthalpy and formation enthalpy - Hess's Law and types of enthalpy - Spontaneity, entropy, and Gibbs energy Timestamps: 0:00 Introduction 0:20 Roadmap 0:55 System, surroundings and boundary 1:44 State functions and internal energy 2:46 Work, heat and the first law 3:34 Quick quiz 1 4:05 Enthalpy at constant pressure 5:13 Calorimetry: measuring heat 6:12 Common mistakes in thermodynamics 7:06 Quick quiz 2 7:37 Reaction enthalpy and formation enthalpy 8:37 Hess's Law and types of enthalpy 9:34 Spontaneity and entropy 10:34 Gibbs energy and equilibrium 11:48 Quick quiz 3 12:15 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    14 分
  • Chemical Bonding and Molecular Structure

    Chemical Bonding and Molecular Structure
    2026/10/03
    Chemical Bonding and Molecular Structure, Class 11 Chemistry NCERT Chapter 4: quick revision in Hindi, about 13 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Octet rule and covalent bonding - Lewis structures and formal charge - Exceptions to the octet rule: incomplete, odd-electron, expanded - Ionic bonds and lattice enthalpy - Bond parameters: length, angle, enthalpy, order - Resonance and dipole moment (polarity) - VSEPR theory, valence bond theory and hybridisation - Molecular orbital theory and hydrogen bonding Timestamps: 0:00 Introduction 0:19 Roadmap 0:46 Octet rule and covalent bonds 1:29 Lewis structures and formal charge 2:19 Formal charge is not a real charge 2:37 Exceptions to the octet rule 3:10 Quick quiz 1 3:40 Ionic bonds and lattice enthalpy 4:30 Bond length, angle, enthalpy, order 5:43 Resonance hybrid, not a flipping molecule 6:11 Bond polarity and dipole moment 7:00 Quick quiz 2 7:32 VSEPR theory and molecular shape 8:15 Valence bond theory: sigma and pi bonds 8:41 A double bond is not two sigma bonds 9:01 Hybridisation: sp, sp2, sp3 10:06 Molecular orbital theory and bond order 10:58 Quick quiz 3 11:31 Hydrogen bonding 12:14 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    13 分
  • Ch 3 Classification of Elements and Periodicity in Properties | Class 11 Chemistry in Hindi

    Ch 3 Classification of Elements and Periodicity in Properties | Class 11 Chemistry in Hindi
    2026/10/02
    Classification of Elements and Periodicity in Properties, Class 11 Chemistry NCERT Chapter 3: quick revision in Hindi, about 13 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - Why elements need to be classified - Dobereiner's triads, Newlands' octaves and Mendeleev's periodic law - Moseley, atomic number and the Modern Periodic Law - IUPAC naming of elements with atomic number above 100 - Electronic configuration, periods and the s, p, d, f blocks - Metals, non-metals and metalloids - Trends in atomic radius, ionic radius and ionization enthalpy - Electron gain enthalpy, electronegativity, oxides and diagonal relationship Timestamps: 0:00 Introduction 0:21 Roadmap 0:55 Why do we need to classify elements? 1:30 Dobereiner's triads, Newlands' octaves and Mendeleev 2:36 Quick quiz 1 2:57 Moseley and the Modern Periodic Law 3:51 IUPAC names of elements with Z above 100 4:21 Quick quiz 2 4:43 Electronic configuration and period lengths 5:27 s, p, d and f blocks of the periodic table 6:24 Common mistakes about the blocks 7:12 Metals, non-metals and metalloids 7:46 Atomic radius and ionic radius trends 8:29 Quick quiz 3 8:57 Ionization enthalpy and its trends 9:52 Electron gain enthalpy and electronegativity 10:30 Ionization vs electron gain enthalpy mix-ups 10:54 Nature of oxides, anomalous behaviour, diagonal relation 11:40 Quick quiz 4 12:11 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    13 分
  • Structure of Atom

    Structure of Atom
    2026/09/29
    Structure of Atom, Class 11 Chemistry NCERT Chapter 2: quick revision in Hindi, about 13 minutes, with quick quizzes and a one-minute recap. Free NCERT notes, flashcards and practice: https://padhaipaglu.com In this episode: - How subatomic particles were discovered - Thomson's plum pudding model and Rutherford's nuclear model - Planck's quantum theory and photoelectric effect - Bohr's model of the hydrogen atom - de Broglie's matter waves and Heisenberg's uncertainty principle - Quantum numbers and shapes of s, p and d orbitals - Aufbau, Pauli exclusion and Hund's rule for electron configuration Timestamps: 0:00 Introduction 0:19 Roadmap 0:53 Discovery of electron, proton and neutron 2:11 Quick quiz 1 2:33 Thomson's model and Rutherford's gold foil experiment 3:34 Quick quiz 2 4:03 Atomic number, mass number and Rutherford model's flaws 4:46 Planck's quantum theory and photoelectric effect 6:05 Common mistakes about light intensity and Bohr's model 6:46 Bohr's model of the hydrogen atom 7:29 Quick quiz 3 7:50 de Broglie dual nature and Heisenberg uncertainty principle 8:52 Quantum numbers and shapes of orbitals 9:42 Quick quiz 4 10:05 Aufbau, Pauli and Hund's rules for electronic configuration 11:02 Quick quiz 5 11:28 One-minute recap The narration is AI-generated (a synthetic voice, not a real person's). Chapter content follows the NCERT syllabus.
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    13 分