IIT – JEE Chemistry

IIT JEE Chemistry Practice Paper – Part 9 covers the topic of Solid State, a fundamental concept in Physical Chemistry. This section focuses on crystal lattices, unit cells, packing efficiency, defects in solids, and electrical properties. Many tricky and conceptual questions are asked from this topic in JEE Main and Advanced. In this practice paper, you will find 10 carefully selected multiple-choice questions inspired by previous years’ exams. Each question comes with detailed solutions and explanations to help you clear concepts, avoid common mistakes, and build the confidence needed to tackle Solid State questions in the actual exam. IIT JEE Chemistry Practice Paper – Part 9 (Solid State) Instructions: Attempt all 10 questions. Each correct answer carries 4 marks. No negative marking here. After submitting, you’ll see your score, number of correct/wrong answers, and explanations. Q1. Which of the following is an example of ionic solid? Diamond Sodium chloride Graphite Ice Q2. In body-centered cubic (bcc) arrangement, the coordination number of each atom is: 4 6 8 12 Q3. The packing efficiency in a face-centered cubic (fcc) lattice is: 52.4% 68.0% 74.0% 60.0% Q4. Schottky defect is observed in: KCl ZnS AgCl FeO Q5. Which type of solid shows electrical conductivity in solid as well as molten state? Covalent solids Ionic solids Metallic solids Molecular solids Q6. The number of atoms per unit cell in a simple cubic structure is: 1 2 4 6 Q7. Frenkel defect is usually observed in: NaCl KCl AgBr CsCl Q8. The edge length of a unit cell is 400 pm. If it is fcc, the radius of the atom is approximately: 141 pm 200 pm 282 pm 173 pm Q9. Which of the following is not a crystalline solid? Quartz Glass Sodium chloride Diamond Q10. In hexagonal close packing (hcp), the percentage of empty space is: 26% 32% 40% 20%

IIT JEE Chemistry Practice Paper – Previous Years’ Questions Part 7: Redox Reactions Q1. In the reaction: Zn + CuSO₄ → ZnSO₄ + Cu, which element is oxidized? a) Cu b) Zn c) S d) O Q2. In which of the following reactions is H₂O₂ acting as an oxidizing agent? a) 2H₂O₂ → 2H₂O + O₂ b) H₂O₂ + 2KI + H₂SO₄ → I₂ + 2H₂O + K₂SO₄ c) H₂O₂ + Na₂SO₃ → Na₂SO₄ + H₂O d) H₂O₂ + Cl₂ → 2HCl + O₂ Q3. The oxidation number of Cr in K₂Cr₂O₇ is: a) +2 b) +3 c) +6 d) +7 Q4. Which of the following is a disproportionation reaction? a) Cl₂ + 2OH⁻ → Cl⁻ + ClO⁻ + H₂O b) Zn + Cu²⁺ → Zn²⁺ + Cu c) Fe²⁺ + MnO₄⁻ → Fe³⁺ + Mn²⁺ d) Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag Q5. Which of the following statements about oxidizing agents is correct? a) They undergo reduction b) They undergo oxidation c) They always contain oxygen d) They always contain halogens Q6. The change in oxidation number of Mn in KMnO₄ when it acts as an oxidizing agent in acidic medium is: a) +7 to +2 b) +7 to +4 c) +7 to +6 d) +7 to +5 Q7. In the reaction: 2FeCl₃ + SnCl₂ → 2FeCl₂ + SnCl₄, the reducing agent is: a) FeCl₃ b) SnCl₂ c) FeCl₂ d) SnCl₄ Q8. Which of the following reactions is NOT a redox reaction? a) CaCO₃ → CaO + CO₂ b) 2Mg + O₂ → 2MgO c) Zn + 2HCl → ZnCl₂ + H₂ d) Fe²⁺ + Cl₂ → Fe³⁺ + 2Cl⁻ Q9. In acidic medium, MnO₂ acts as an oxidizing agent and changes into: a) Mn²⁺ b) Mn³⁺ c) MnO₄⁻ d) Mn Q10. In which of the following is the oxidation number of nitrogen highest? a) NH₃ b) NO₂ c) HNO₃ d) N₂ Submit These IIT JEE Chemistry practice quizzes are highly useful for students as they provide structured, exam-oriented preparation. Each quiz is topic-specific, allowing aspirants to revise one concept at a time and strengthen their weak areas. The format follows the real JEE exam pattern, with multiple-choice questions and negative marking awareness, which helps students build accuracy and time management skills. Detailed explanations after every question enhance conceptual clarity and prevent repetitive mistakes. Since the quizzes are self-evaluating, students can measure progress instantly and adapt their study strategy accordingly, ensuring consistent improvement and confidence for IIT JEE success.

IIT JEE Chemistry Practice Paper – Previous Years’ Questions Part 6: Thermodynamics Answer the following multiple-choice questions. Each correct answer carries 4 marks. Submit to see your score and explanations. 1. The enthalpy change for a reaction does not depend upon: a) Physical state of reactants b) Temperature of reaction c) Path of the reaction d) Physical state of products 2. Which law of thermodynamics introduces the concept of entropy? a) Zeroth Law b) First Law c) Second Law d) Third Law 3. The internal energy of an ideal gas depends on: a) Pressure only b) Volume only c) Temperature only d) Both pressure and volume 4. In an isothermal process, the change in internal energy of an ideal gas is: a) Positive b) Negative c) Zero d) Depends on pressure 5. Gibbs free energy is given by: a) G = H + TS b) G = H – TS c) G = U + PV d) G = U – PV 6. The enthalpy of neutralization of a strong acid with a strong base is approximately: a) –57 kJ/mol b) –100 kJ/mol c) +57 kJ/mol d) 0 kJ/mol 7. A process in which no heat enters or leaves the system is called: a) Isothermal b) Isobaric c) Isochoric d) Adiabatic 8. For a spontaneous reaction at constant temperature and pressure: a) ΔG > 0 b) ΔG < 0 c) ΔH > 0 d) ΔS < 0 9. In which process is work done maximum? a) Reversible process b) Irreversible process c) Isobaric process d) Isochoric process 10. The First Law of Thermodynamics is a statement of: a) Conservation of energy b) Conservation of entropy c) Conservation of enthalpy d) Conservation of mass Submit

IIT JEE Chemistry Practice Paper – Part 4 Topic: States of Matter Attempt the following multiple-choice questions based on States of Matter. Each correct answer carries 4 marks. Submit at the end to check your score with explanations. Q1. Which of the following is not an assumption of the kinetic theory of gases? (a) Gas molecules are in constant random motion (b) Intermolecular forces are negligible (c) Volume of gas molecules is negligible compared to container (d) All collisions are inelastic Q2. The compressibility factor (Z) is defined as: (a) Z = PV/RT (b) Z = RT/PV (c) Z = nRT/PV (d) Z = V/nRT Q3. At Boyle’s temperature, a real gas shows: (a) Maximum deviation from ideal behavior (b) No deviation from ideal behavior (c) Liquefaction (d) Negative pressure Q4. Which law states that at constant temperature, pressure of a fixed mass of gas is inversely proportional to its volume? (a) Charles’ Law (b) Boyle’s Law (c) Avogadro’s Law (d) Gay-Lussac’s Law Q5. Critical temperature of a gas is the temperature: (a) Above which gas cannot be liquefied (b) At which gas shows ideal behavior (c) At which pressure is zero (d) Below which volume is negligible Q6. Which gas law forms the basis of absolute temperature scale? (a) Avogadro’s Law (b) Charles’ Law (c) Boyle’s Law (d) Dalton’s Law Q7. Real gases approach ideal behavior at: (a) Low temperature and high pressure (b) High temperature and low pressure (c) Low temperature and low pressure (d) High temperature and high pressure Q8. Which of the following plots is a straight line for an ideal gas at constant temperature? (a) P vs V (b) V vs T (c) P vs 1/V (d) PV vs P Q9. Van der Waals’ constant ‘a’ is a measure of: (a) Size of molecules (b) Pressure correction (c) Intermolecular attraction (d) Molecular mass Q10. Diffusion of gases is governed by: (a) Dalton’s Law (b) Graham’s Law (c) Boyle’s Law (d) Avogadro’s Law Submit

Topic: Periodic Table Introduction: This set focuses on the Periodic Table – one of the most fundamental topics in chemistry, essential for understanding trends in atomic size, ionization energy, electronegativity, reactivity, and chemical behavior. These 10 multiple-choice questions are based on the style and difficulty level of previous years’ IIT JEE questions, ensuring strong exam preparation. Attempt all questions and click Submit to instantly view your score, correct answers, and explanations. 1. Which of the following has the largest atomic radius? Na Mg K Ca 2. The element with electronic configuration [Ne]3s²3p⁴ belongs to: Group 14, Period 3 Group 16, Period 3 Group 15, Period 3 Group 16, Period 2 3. Which periodic trend increases from left to right across a period? Atomic radius Metallic character Ionization energy Atomic mass 4. Which element is a halogen? Oxygen Nitrogen Chlorine Sulphur 5. Which of the following has the highest electronegativity? F O Cl N 6. The first element of the modern periodic table is: Helium Hydrogen Lithium Sodium 7. Which of the following is an alkali metal? Ca K Mg Al 8. Which of the following pairs are in the same group? Na and Mg Li and K C and N O and F 9. Which of the following has the highest metallic character? Na K Mg Al 10. Which block of the periodic table contains the noble gases? s-block p-block d-block f-block

IIT JEE Chemistry Practice Paper – Part 2 Topic: Chemical Bonding Introduction: Part 2 focuses on Chemical Bonding — a high-value topic for JEE Main & Advanced. This set contains 10 multiple-choice questions drawn from previous years’ patterns to test bonding types, VSEPR, hybridisation, molecular orbital ideas, resonance, hydrogen bonding and lattice concepts. Attempt all questions and click Submit to get instant scoring and concise explanations. 1. Which bond is the most polar? H–F H–Cl H–Br H–I 2. The hybridisation of boron in BF3 is: sp sp2 sp3 dsp2 3. Bond order of molecular oxygen (O2) is: 1 1.5 2 3 4. Which of the following species shows resonance? CO (carbon monoxide) CO2 (carbon dioxide) CO32− (carbonate) CH4 (methane) 5. Which compound exhibits hydrogen bonding (intermolecular)? CH4 CH3OH CCl4 CO2 6. The molecular shape of SF4 is: Tetrahedral Square planar Seesaw (or distorted trigonal bipyramidal) Trigonal planar 7. Which element has the highest electronegativity? C N O F 8. Which of these ionic compounds has the highest lattice energy? MgO NaCl KCl CaO 9. Which statement about π (pi) bonds is correct? π bonds are formed by end-to-end overlap of orbitals. π bonds allow free rotation about the bond axis. π bonds are formed by side-by-side overlap of p orbitals. A single σ bond is weaker than a single π bond between the same atoms. 10. Formal charge on nitrogen in NH4+ is: −1 0 +1 +2

IIT JEE Chemistry Practice Paper – Part 1 focuses on the foundational topic of Atomic Structure. This topic forms the basis of modern chemistry and is frequently tested in the JEE Main and Advanced exams. In this practice set, we have curated 10 multiple-choice questions from previous years’ IIT JEE papers to help you assess your understanding, improve accuracy, and build exam confidence. Each question is followed by instant feedback, explanations, and scoring — all designed to give you a real exam-like experience. IIT JEE Chemistry Practice Paper – Part 1 Topic: Atomic Structure Answer all the following questions and click Submit to check your result. 1. The number of radial nodes in 3p orbital is: 0 1 2 3 2. Which of the following has the lowest ionization energy? Na Mg Al K 3. Which of the following is not possible according to the quantum numbers? n = 3, l = 0, m = 0 n = 2, l = 2, m = 0 n = 4, l = 2, m = 1 n = 1, l = 0, m = 0 4. The energy of an electron in the nth orbit of hydrogen atom is given by: -13.6/n 13.6n -13.6/n² -n²/13.6 5. The maximum number of electrons in a subshell is given by: 2l + 1 2n² 4l + 2 n² 6. Which of the following transitions corresponds to emission of energy? n = 2 to n = 4 n = 3 to n = 5 n = 4 to n = 2 n = 1 to n = 3 7. The value of spin quantum number for an electron in 2s orbital is: 1 0 +1/2 or -1/2 2 8. What is the magnetic quantum number (m) for 3d orbital? 0 -1, 0, +1 -2, -1, 0, +1, +2 +2 only 9. Which rule is violated in the configuration 1s² 2s² 2p⁴ where two electrons in one p orbital have same spin? Hund’s Rule Pauli Exclusion Principle Aufbau Principle Bohr’s Rule 10. The number of orbitals in n = 3 energy level is: 9 3 6 5