This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In which type of hybridization does one s and two p orbitals mix? A) Dsp3 hybridization. B) Sp2 hybridization. C) Sp hybridization. D) Sp3 hybridization. Show Answer Correct Answer: B) Sp2 hybridization. 2. Which of the following has the lowest boiling point? (2000 M) A) CH4. B) H2O. C) HF. D) C2H5OH. Show Answer Correct Answer: A) CH4. 3. PCl5 molecule has the follwoing geometry A) Trigonal bipyramidal. B) Pyramidal. C) Square Planar. D) Octahedral. Show Answer Correct Answer: A) Trigonal bipyramidal. 4. Is good conduction of electricity a characteristic of most metals? If yes, explain how metallic bonding accounts for this property. A) Yes, because delocalized electrons move freely. B) No, because metallic bonds prevent electron movement. C) Yes, because metals are insulators. D) No, because metals are transparent. Show Answer Correct Answer: A) Yes, because delocalized electrons move freely. 5. Which atom will never be in the middle of a Lewis Dot structure? A) N. B) C. C) H. D) None of the above. Show Answer Correct Answer: C) H. 6. True or False:Atoms can bond to form molecules. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. According to VSEPR theory, which of the following species has a square planar molecular structure? A) BrF$_{3}$. B) SCl$_{2}$. C) TeBr$_{4}$. D) XeF$_{4}$. Show Answer Correct Answer: D) XeF$_{4}$. 8. Among the following the maximum covalent character is shown by the compound A) AlCl$_{3}$. B) MgCl$_{2 }$. C) FeCl$_{2}$. D) SnCl$_{2}$. Show Answer Correct Answer: A) AlCl$_{3}$. 9. What is the molecular geometry of a water molecule? A) Octahedral. B) Linear. C) Tetrahedral. D) Bent. Show Answer Correct Answer: D) Bent. 10. What is the minimum energy state in the formation of a hydrogen molecule? A) When electrons are unpaired. B) When the bond length is zero. C) When atoms are far apart. D) When atomic orbitals overlap. Show Answer Correct Answer: D) When atomic orbitals overlap. 11. Which of the following molecules has a bent shape? A) CH4. B) BF3. C) CO2. D) H2O. Show Answer Correct Answer: D) H2O. 12. Which has greater ionic character:AlCl3, MgCl2 and NaCl A) AlCl3. B) MgCl2. C) NaCl. D) None of the above. Show Answer Correct Answer: C) NaCl. 13. Which type of bond is formed between elements with low ionization enthalpies and high negative values of electron gain enthalpy? A) Covalent Bond. B) Metallic Bond. C) Polar Covalent Bond. D) Ionic Bond. Show Answer Correct Answer: D) Ionic Bond. 14. The combination of elements which forms ionic bond is A) Sulphur-oxygen. B) Carbon-chlorine. C) Potassium-bromine. D) Boron-fluorine. Show Answer Correct Answer: C) Potassium-bromine. 15. In which of the above the valence d-orbital participate in hybridisation? A) 1. B) 2. C) Both. D) None of the above. Show Answer Correct Answer: A) 1. 16. In which of the following molecules, octet rule is not followed? A) CH4. B) CO2. C) NO. D) NH3. Show Answer Correct Answer: C) NO. 17. In which type of bond does the shared pair of electrons get displaced towards one atom? A) Metallic bond. B) Polar covalent bond. C) Nonpolar covalent bond. D) Ionic bond. Show Answer Correct Answer: B) Polar covalent bond. 18. Which of the following is a linear molecule? A) BeCl2. B) CH4. C) H2O. D) SO2. Show Answer Correct Answer: A) BeCl2. 19. Which type of bond is formed when two atoms share two pairs of electrons? A) Single Bond. B) Coordinate Bond. C) Double Bond. D) Triple Bond. Show Answer Correct Answer: C) Double Bond. 20. The Structure of IF7 is pentagonal bipyramidal A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 21. The shape of ammonia molecule is A) Triangular planer. B) Pyramidal. C) Square planer. D) Trigonal bypyramidal. Show Answer Correct Answer: B) Pyramidal. 22. Which of the following pair will form most stable ionic bond? A) Na & F. B) Li & F. C) Na & Cl. D) Mg & F. Show Answer Correct Answer: D) Mg & F. 23. How does the number of protons in an atom affect its atomic number? A) The number of protons in an atom is only related to its mass number, not its atomic number. B) The number of protons in an atom directly corresponds to its atomic number. C) The number of protons in an atom is inversely related to its atomic number. D) The number of protons in an atom has no effect on its atomic number. Show Answer Correct Answer: B) The number of protons in an atom directly corresponds to its atomic number. 24. Which of the following is a limitation of the octet rule? A) It is only applicable to ionic compounds. B) It does not account for molecular shapes. C) It cannot explain the behavior of noble gases. D) It applies to all elements. Show Answer Correct Answer: B) It does not account for molecular shapes. 25. What is the dipole moment of a molecule? A) The product of charge and distance between positive and negative centers. B) The energy required to break a bond. C) The angle between two bonds. D) The distance between the nuclei of bonded atoms. Show Answer Correct Answer: A) The product of charge and distance between positive and negative centers. 26. What is the VSEPR shape for BH$_{3}$? A) Trigonal Bipyramidal. B) Trigonal Planar. C) Linear. D) Trigonal Pyramidal. Show Answer Correct Answer: B) Trigonal Planar. 27. What is the term for the resulting particle when two or more atoms bond by sharing electrons? A) Molecule. B) Atom. C) Ion. D) Proton. Show Answer Correct Answer: A) Molecule. 28. Why is energy released during bond formation? A) Atoms lose electrons, releasing energy. B) Atoms become larger, releasing energy. C) Atoms achieve a more stable configuration, releasing energy. D) Atoms gain protons, releasing energy. Show Answer Correct Answer: C) Atoms achieve a more stable configuration, releasing energy. 29. Three elements, X, Y and Z have consecutive increasing proton numbers. If element Y is a noble gas, what will be the formula of the compound formed by X and Z? A) Z$_{7}$X. B) Z$_{2}$X. C) ZX. D) ZX$_{7}$. Show Answer Correct Answer: C) ZX. 30. In a crystal lattice of an ionic compound: A) Ions of a given charge are clustered together, far from ions of the opposite charge. B) Ions are surrounded by ions of the opposite charge. C) Neutral molecules are present. D) A sea of electrons surrounds the ions. Show Answer Correct Answer: B) Ions are surrounded by ions of the opposite charge. 31. Assertion (A):Though the central atom of both NH$_{3}$ and H$_{2}$O molecules are sp$^{3}$ hybridised, yet H-N-H bond angle is greater than that of H-O-H.Reason (R):This is because nitrogen atom has one lone pair and oxygen atom has two lone pairs. A) A and R both are correct, and R is the correct explanation of A. B) A and R both are correct, but R is not the correct explanation of A. C) A is true but R is false. D) A and R both are false. Show Answer Correct Answer: A) A and R both are correct, and R is the correct explanation of A. 32. In what form do elements such as hydrogen, nitrogen, and oxygen normally occur? A) As molecules containing two atoms. B) As molecules containing three atoms. C) As single atoms. D) As molecules containing four atoms. Show Answer Correct Answer: A) As molecules containing two atoms. 33. Which one of the following molecule contains both ionic and covalent bonds? (2002-E) A) KSO2. B) CHCl. C) SO2. D) BeCl2. Show Answer Correct Answer: A) KSO2. 34. The decreasing order of bond dissociation energy of C-C, C-H and H-H bond is A) CH CC HH$\rightarrow$$\rightarrow$-. B) HH CH CC$\rightarrow$$\rightarrow$-. C) CC CH HH$\rightarrow$$\rightarrow$-. D) CC HH CH$\rightarrow$$\rightarrow$-. Show Answer Correct Answer: B) HH CH CC$\rightarrow$$\rightarrow$-. 35. The formation of a stable ionic compound from ions: A) May be either exothermic or endothermic. B) Neither absorbs nor releases energy. C) Is always endothermic. D) Is always exothermic. Show Answer Correct Answer: D) Is always exothermic. 36. The geometry of a molecule with 4 bonded pairs of electrons and 0 lone pairs of electrons A) Trigonal Planar. B) Trigonal Pyramidal. C) Bent. D) Tetrahedral. Show Answer Correct Answer: D) Tetrahedral. 37. True or False:Some molecules will bond to other molecules, forming large structures. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 38. An element M reacts with chlorine to form a compound X. The bond angle in X is 120$^\circ$. What is M? (2002-M) A) N. B) Mg. C) Be. D) B. Show Answer Correct Answer: D) B. 39. Bond energy and the corresponding bond length vary directly with each other. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 40. MX6 is a molecule with octahedral geometry. How many X-M-X bonds are at 180$^\circ$? A) Three. B) Four. C) Six. D) Two. Show Answer Correct Answer: A) Three. 41. How many electrons are involved in a triple bond? A) 6. B) 4. C) 2. D) 8. Show Answer Correct Answer: A) 6. 42. What is released when a bond dissociation occurs? A) Electrons. B) Protons. C) Neutrons. D) Energy. Show Answer Correct Answer: D) Energy. 43. What elements generally make a covalent bond? A) Metal and nonmetal. B) 2 or more nonmetals. C) Metal. D) None of the above. Show Answer Correct Answer: B) 2 or more nonmetals. 44. VSEPR stands for ..... theory. A) Valence Structure of Electron Pyramids and Regression. B) Varied Structures of Electrons Paired and Replaced. C) Varied Shell Energy of Protons and Radiation. D) Valence Shell Electron Pair Repulsion. Show Answer Correct Answer: D) Valence Shell Electron Pair Repulsion. 45. What is the definition of bond angle? A) The angle between the valence electrons of two different atoms. B) The angle between lone pairs of electrons in a molecule. C) The angle between the nuclei of two bonded atoms. D) The angle between the orbitals containing bonding electron pairs around the central atom in a molecule/complex ion. Show Answer Correct Answer: D) The angle between the orbitals containing bonding electron pairs around the central atom in a molecule/complex ion. 46. Is malleability a characteristic of most metals? If yes, explain how metallic bonding accounts for this property. A) Yes, because metallic bonds allow atoms to slide past each other. B) No, because metallic bonds are rigid and prevent movement. C) Yes, because metallic bonds are ionic in nature. D) No, because metallic bonds are covalent in nature. Show Answer Correct Answer: A) Yes, because metallic bonds allow atoms to slide past each other. 47. What is the bond order in a molecule with a triple bond? A) 4. B) 1. C) 3. D) 2. Show Answer Correct Answer: C) 3. 48. What is bond length defined as? A) The distance between the outermost electrons of two atoms. B) The distance between the nuclei of two bonded atoms. C) The distance between two non-bonded atoms. D) The distance between the centers of two ions. Show Answer Correct Answer: B) The distance between the nuclei of two bonded atoms. 49. What is the primary factor that determines the polarity of a bond? A) The bond length. B) The size of the atoms. C) The temperature of the reaction. D) The electronegativity difference between the atoms. Show Answer Correct Answer: D) The electronegativity difference between the atoms. 50. Find the pair with sp2 hybridisation of the central molecule A) NH$_{3}$ and NO$_{2}$$^{-}$. B) BF$_{3}$ and NH$_{2}$$^{-}$. C) BF$_{3}$ and NO$_{2}$$^{-}$. D) NH2$^{-}$ and H$_{2}$O. Show Answer Correct Answer: C) BF$_{3}$ and NO$_{2}$$^{-}$. 51. If an atom loses two electrons what charge will it have? A) +1. B) -1. C) + 2. D) -2. Show Answer Correct Answer: C) + 2. 52. How do isotopes of an element differ from each other? A) Isotopes of an element differ in their electron configuration. B) Isotopes of an element differ in their atomic number. C) Isotopes of an element differ in their chemical properties. D) Isotopes of an element differ in the number of neutrons in their nuclei. Show Answer Correct Answer: D) Isotopes of an element differ in the number of neutrons in their nuclei. 53. What element forms a triple bond? A) Iodine. B) Magnesium. C) Flourine. D) Nitrogen. Show Answer Correct Answer: D) Nitrogen. 54. What is the term for the stable electronic arrangement of eight electrons in the outer shell? A) Octet rule. B) Valence rule. C) Duet rule. D) Stable rule. Show Answer Correct Answer: A) Octet rule. 55. Which of the following compounds is an exception to the typical formation of ionic compounds? A) MgO. B) NH4+. C) CaF2. D) NaCl. Show Answer Correct Answer: B) NH4+. 56. A polar molecule contains A) Ions. B) A region of positive charge and a region of negative charge. C) Only London forces. D) No bonds. Show Answer Correct Answer: B) A region of positive charge and a region of negative charge. 57. Describe the atomic structure of an atom. A) An atom consists of only protons in the nucleus. B) Electrons are located in the nucleus of an atom. C) The atomic structure of an atom includes protons and electrons only. D) The atomic structure of an atom includes a nucleus composed of protons and neutrons, with electrons orbiting around the nucleus in energy levels. Show Answer Correct Answer: D) The atomic structure of an atom includes a nucleus composed of protons and neutrons, with electrons orbiting around the nucleus in energy levels. 58. If two covalently bonded atoms are identical, the bond is A) Polar covalent. B) Dipole covalent. C) Nonpolar covalent. D) Coordinate covalent. Show Answer Correct Answer: C) Nonpolar covalent. 59. Which of the following molecule is not polar? A) NF3. B) CHCl3. C) NH3. D) BF3. Show Answer Correct Answer: D) BF3. 60. Covalent bonding is between a A) Nonmetal and nonmetal. B) Metal and nonmetal. C) Metal and metal. D) It depends on the situation. Show Answer Correct Answer: A) Nonmetal and nonmetal. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 1Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 2Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 3Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 5Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry QuizClass 11 Chemistry (Part I) Chapter 2 Structure Of Atom QuizClass 11 Chemistry (Part I) Chapter 3 Classification Of Elements And Periodicity In Properties QuizClass 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books