Class 11 Chemistry questions with answers

135 NCERT Class 11 Chemistry questions with answers, chapter by chapter, from Some Basic Concepts of Chemistry to Hydrocarbons.

How to teach Class 11 Chemistry · Class 11 Chemistry common misconceptions

• Chapter 1: Some Basic Concepts of Chemistry

  15 questions · Chemistry, matter, states, and classification · Measurement, SI units, uncertainty, and dimensional analysis · Laws of chemical combination and Dalton's atomic theory · Atomic, average atomic, molecular, and formula mass · Mass percent, mole fraction, molarity, molality, and dilution · Mole, Avogadro constant, entities, and molar mass · Mass composition, empirical formula, and molecular formula · Balanced equations and stoichiometric calculation · Limiting reagent, excess reagent, and product yield

• Chapter 2: Structure of Atom

  15 questions, 1 with pictures · Atomic spectra, hydrogen series, and the Rydberg relation · Subatomic particles, atomic identity, isotopes, and ions · Thomson and Rutherford models: evidence and limitations · Electromagnetic radiation, quantization, and photoelectric effect · Bohr model of hydrogen-like species · Matter waves and Heisenberg uncertainty · Orbital probability, shapes, and nodes · Quantum-mechanical orbitals and quantum numbers · Orbital energies, shielding, and effective nuclear charge · Electronic configurations, filling rules, and subshell stability

• Chapter 3: Classification of Elements and Periodicity in Properties

  15 questions · Mendeleev's predictions and the modern periodic law · Need for classification and historical periodic schemes · Electronic configuration, periodic position, and blocks · Periods, groups, and systematic element nomenclature · Block characteristics, metallicity, and second-period anomalies · Atomic radius, ionic radius, and isoelectronic ordering · Ionization enthalpy, successive removal, and exceptions · Electron gain enthalpy and electronegativity · Valence, oxidation state, and periodic compound formulas · Periodic reactivity and acidic-basic character of oxides

• Chapter 4: Chemical Bonding and Molecular Structure

  15 questions · Hydrogen bonding: cause, types, and consequences · Kössel–Lewis bonding, Lewis structures, formal charge, and octet limits · Ionic bond formation and lattice enthalpy · Bond parameters, bond order trends, and resonance · Bond polarity, molecular dipole moment, and polarisation · Hybridisation, molecular geometry, and multiple bonding · VSEPR electron-domain geometry and molecular shape · Valence-bond overlap, potential energy, and σ/π bonds · MO electron configurations, bond order, stability, and magnetism · Molecular-orbital formation, symmetry, and energy ordering

• Chapter 5: Thermodynamics

  15 questions · Systems, surroundings, properties, states, and processes · Heat, pressure-volume work, sign conventions, and the first law · Enthalpy, internal energy, and process conditions · Heat capacity, specific heat, and calorimetry · Thermochemical equations and standard enthalpy changes · Hess's law, bond enthalpy, atomisation, and lattice cycles · Second and third laws, surroundings entropy, and stability · Spontaneity, entropy, and total-entropy criteria · Gibbs energy, temperature, and spontaneity · Standard Gibbs energy and equilibrium constants

• Chapter 6: Equilibrium

  15 questions · Dynamic physical and chemical equilibrium · Equilibrium composition and stoichiometric change tables · Gibbs energy and the equilibrium constant · Heterogeneous equilibria and the relation between Kp and Kc · Law of mass action and equilibrium-constant expressions · Reaction quotient, direction, and extent of reaction · Le Chatelier responses to concentration, pressure, and temperature · Arrhenius, Brønsted-Lowry, and Lewis acid-base models · Water ionization, pH, and strong electrolytes · Weak-acid/base ionization, Ka, Kb, and common-ion effects · Salt hydrolysis and buffer solutions · Solubility product, common ions, and selective precipitation

• Chapter 7: Redox Reactions

  15 questions · Ion–electron balancing in acidic and basic media · Average, fractional, and atom-specific oxidation states · Classical, electron-transfer, and oxidation-number views of redox · Oxidants, reductants, and oxidation-state limits · Oxidation-number rules, exceptions, and Stock notation · Balancing redox equations by oxidation-number change · Combination, decomposition, displacement, and disproportionation · Redox titrations, indicators, endpoints, and stoichiometry · Redox couples, the Daniell cell, and charge transport · Standard reduction potentials, redox strength, and feasibility

• Chapter 8: Organic Chemistry – Some Basic Principles and Techniques

  15 questions · Carbon hybridisation, molecular shape, and sigma/pi bonding · Structural representations, functional groups, and homologous series · IUPAC nomenclature of chains, functional groups, and benzene derivatives · Structural isomerism, stereoisomerism, and resonance distinction · Bond fission, reactive intermediates, electrophiles/nucleophiles, and arrows · Inductive, resonance, electromeric, and hyperconjugative effects · Substitution, addition, elimination, and rearrangement reactions · Purification, extraction, distillation, and chromatography · Qualitative detection by sodium fusion and specific tests · Quantitative estimation of C, H, N, halogens, S, P, and O

• Chapter 9: Hydrocarbons

  15 questions · Hydrocarbon classification, IUPAC naming, and structural isomerism · Substituent effects, orientation, reactivity, and hydrocarbon toxicity · Alkyne structure, preparation, acidity, and additions · Preparation of alkanes and limits of coupling methods · Alkane properties, combustion, pyrolysis, and radical halogenation · Alkene bonding and geometrical isomerism · Conformations of ethane and torsional strain · Alkene preparation, electrophilic addition, peroxide effect, and ozonolysis · Benzene structure, resonance, and aromaticity · Preparation and electrophilic substitution of benzene