Chemistry class 11

                       

                                                        

                                  

INTRODUCTION

Chemistry is one of the most fascinating and essential subjects in Class 11, forming the foundation for advanced studies in science and preparing students for competitive exams. From understanding the basic structure of atoms to exploring chemical reactions and the properties of matter, Class 11 Chemistry introduces students to the core concepts that shape the world around us.

In this article, you will find a complete overview of the Class 11 Chemistry syllabus, designed to help you understand what to study and how to plan your preparation effectively.

Along with the syllabus, we have included 35 carefully selected multiple-choice questions (MCQs) for self-evaluation. These questions will not only test your understanding but also help you identify your strengths and areas that need improvement. Whether you are revising before exams or just starting your preparation, this guide will serve as a valuable resource to strengthen your concepts and boost your confidence in Chemistry.

CLASS XI : Syllabus of Chemistry (THEORY)

1. Some basic concepts of chemistry

2. Structure of atom

3. Classification of elements and periodicity in properties

4. Chemical bonding and molecular structure

5. Thermodynamics

6. Equilibrium

7. Redox reactions

8. Organic chemistry:- some basic principles and techniques

9. Hydrocarbons

SELF EVALUATION 

  1. How many scientific fundamental quantities are given in S.I. units ?


  2. (A) 5

    (B) 7

    (C) 3

    (D) 9



  3. The amount of CO₂ that could be produced when one mole of carbon is burnt in air, is


  4. (A) 22 g

    (B) 50 g

    (C) 44 g

    (D) 56 g



  5. A solution contains 8 mole of solute and the mass of solvent is 4 kg. What is the molality of this solution?


  6. (A) 5 mol/kg

    (B) 8 mol/kg

    (C) 4 mol/kg

    (D) 2 mol/kg



  7. The empirical formula of the compound glucose is


  8. (A) CH₂O

    (B) CHO

    (C) C₆H₁₂O₆

    (D) C₁₂H₂₂O₁₁



  9. Calculate the number of electrons, protons and neutrons in ₃₅Br⁸⁰ .


  10. (A) 35, 45, 35

    (B) 35, 35, 45

    (C) 35, 36, 45

    (D) 36, 35, 45



  11. When an electron jumps from 3 rd orbit to 2 nd orbit , which series of spectral lines is obtained?


  12. (A) Balmer

    (B) Lyman

    (C) Paschen

    (D) Brackett



  13. What will be the wavelength of a ball of mass 0.1 kg moving with a velocity of 10 m/s ?


  14. (A) 6.626 × 10⁻³⁰ m

    (B) 6.626 × 10⁻³² m

    (C) 6.626 × 10⁻³³ m

    (D) 6.626 × 10⁻³⁴ m



  15. Maximum number of electrons in 4d orbital is


  16. (A) 14

    (B) 10

    (C) 8

    (D) 6



  17. Which of the following principles/ rules states that the electron enters the subshell that has the lowest energy ?


  18. (A) Pauli exclusion principle

    (B) Aufbau principle

    (C) Hund's rule

    (D) Heisenberg uncertainty principle



  19. To which block is an element having electronic configuration [Ar]4s¹3d¹⁰ related ?


  20. (A) s-block

    (B) p-block

    (C) d-block

    (D) f-block



  21. How many groups are present in the modern periodic table?


  22. (A) 15

    (B) 18

    (C) 10

    (D) 20



  23. O²⁻ , F⁻, Na⁺ and Mg²⁺ are called as


  24. (A) isoelectronic species

    (B) isoneutral species

    (C) isotopes

    (D) isobars



  25. Which of the following configurations has the highest ionisation energy ?


  26. (A) ns²np³

    (B) ns²np²

    (C) ns²np¹

    (D) ns²np⁶



  27. The dipole moment of BeCl₂ is


  28. (A) less than zero

    (B) more than zero

    (C) zero

    (D) 1.85 D



  29. The numbers of σ and π bonds in a molecule of benzene are


  30. (A) 6σ and 6π

    (B) 12σ and 6π

    (C) 12σ and 12π

    (D) 12σ and 3π



  31. The bond angle between two bonds in a linear molecule is


  32. (A) 108°

    (B) 180°

    (C) 74•5°

    (D) 90°



  33. The hybridisation of P in PCl₅ is


  34. (A) dsp²

    (B) sp³d

    (C) sp²d²

    (D) spd³



  35. What is the shape of the molecule NH₃?


  36. (A) square pyramidal

    (B) V - shape

    (C) Trigonal pyramidal

    (D) Tetrahedral



  37. For the process to occur under isothermal condition, the correct condition is


  38. (A) q = 0

    (B) ∆q = 0

    (C) ∆T = 0

    (D) T = 0



  39. The enthalpies of all the elements in their standard states are


  40. (A) unity

    (B) zero

    (C) positive

    (D) negative



  41. The enthalpies of combustion of methane, graphite and hydrogen at 298K are -890•3, -393•5 and -285•8 in kJ/ mol respectively. Enthalpy of formation of CH₄(g) will be


  42. (A) -74•8 kJ mol⁻¹

    (B) -52•27 kJ mol⁻¹

    (C) +74•8 kJ mol⁻¹

    (D) +52•26 kJ mol⁻¹



  43. If ∆G < 0; then the process is


  44. (A) spontaneous

    (B) in equilibrium

    (C) non- spontaneous

    (D) none of these



  45. For a reversible reaction A + B ⇌ C + D , the equilibrium constant K is equal to


  46. (A) [A][B]/[C][D]

    (B) [C][A]/[B][D]

    (C) [C][D]/[B][A]

    (D) [A][D]/[B][C]



  47. The conjugate acid of NH₃ is


  48. (A) NH₂⁻

    (A) NH₄⁺

    (A) NH²⁻

    (A) N₂H₄



  49. What is the effect of addition of H₂ on the equilibrium of the reaction 2H₂(g) + CO (g) ⇌ CH₃OH (g) ?


  50. (A) Reaction will proceed in the direction of reactants

    (B) No effect on equilibrium

    (C) Reaction will proceed in the direction of products

    (D) none of these



  51. The value of pH of 0•1 M NaOH solution is equal to


  52. (A) 13

    (B) 1•2

    (C) 5•0

    (D) 1•0



  53. What is the oxidation state of S in H₂SO₄ ?


  54. (A) +4

    (B) +5

    (C) +6

    (D) +8



  55. In the reaction CuO(s) + H₂(g) → Cu(s) + H₂O(g) oxidising agent is


  56. (A) CuO

    (B) H₂

    (C) Cu

    (D) H₂O



  57. The number of electrons transferred in the given half reaction is MnO₄⁻(aq) +8H⁺ (aq) → Mn²⁺(aq) + 4H₂O(l)


  58. (A) 2

    (B) 3

    (C) 5

    (D) 7



  59. 3Mg(s) + N₂ (g) ⟶ Mg₃N₂(s)


  60. (A) Decomposition reaction

    (B) Combination reaction

    (C) Displacement reaction

    (D) Combustion reaction



  61. IUPAC name of CH₃CH₂COCH₂CH₃ is


  62. (A) Butan-2-ol

    (B) Butanal

    (C) Pentan-3-one

    (D) Pentanal



  63. Which of the following is an electrophile ?


  64. (A) NH₃

    (B) CN⁻

    (C) -COOH

    (D) Cl⁺



  65. Functional group isomer of CH₃-O-CH₃ is


  66. (A) CH₃CH₂OH

    (B) CH₃CHO

    (C) CH₃COCH₃

    (D) CH₃COOH



  67. Which of the following is not an example of electron displacement effect in covalent bond?


  68. (A) inductive effect

    (B) Resonance effect

    (C) Hyperconjugation

    (D) Distillation



  69. (CH₃)₃C⁺ is


  70. (A) Isopropyl free radical

    (B) Phenyl free radical

    (C) Benzyl free radical

    (D) Tert-butyl free radical



CONCLUSION

To sum up, mastering Class 11 Chemistry requires dedication, clarity of concepts, and continuous practice. The syllabus serves as your roadmap, while the MCQs help you track your progress. Don’t be afraid of mistakes—they are part of the learning process. Stay consistent, keep testing yourself, and you’ll gradually build confidence and excel in your exams.


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