This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. The combination of elements which forms ionic bond is A) Boron-fluorine. B) Carbon-chlorine. C) Potassium-bromine. D) Sulphur-oxygen. Show Answer Correct Answer: C) Potassium-bromine. 3. 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. 4. In which of the following molecules, octet rule is not followed? A) NO. B) CH4. C) NH3. D) CO2. Show Answer Correct Answer: A) NO. 5. 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. 6. Which of the following is a linear molecule? A) BeCl2. B) H2O. C) SO2. D) CH4. Show Answer Correct Answer: A) BeCl2. 7. Which type of bond is formed when two atoms share two pairs of electrons? A) Coordinate Bond. B) Double Bond. C) Single Bond. D) Triple Bond. Show Answer Correct Answer: B) Double Bond. 8. 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. 9. The shape of ammonia molecule is A) Triangular planer. B) Trigonal bypyramidal. C) Pyramidal. D) Square planer. Show Answer Correct Answer: C) Pyramidal. 10. Which of the following pair will form most stable ionic bond? A) Mg & F. B) Na & F. C) Li & F. D) Na & Cl. Show Answer Correct Answer: A) Mg & F. 11. 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 has no effect on its atomic number. D) The number of protons in an atom is inversely related to its atomic number. Show Answer Correct Answer: B) The number of protons in an atom directly corresponds to its atomic number. 12. 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. 13. 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. 14. What is the VSEPR shape for BH$_{3}$? A) Linear. B) Trigonal Planar. C) Trigonal Pyramidal. D) Trigonal Bipyramidal. Show Answer Correct Answer: B) Trigonal Planar. 15. What is the term for the resulting particle when two or more atoms bond by sharing electrons? A) Ion. B) Molecule. C) Atom. D) Proton. Show Answer Correct Answer: B) Molecule. 16. Why is energy released during bond formation? A) Atoms lose electrons, releasing energy. B) Atoms achieve a more stable configuration, releasing energy. C) Atoms gain protons, releasing energy. D) Atoms become larger, releasing energy. Show Answer Correct Answer: B) Atoms achieve a more stable configuration, releasing energy. 17. 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) ZX. B) ZX$_{7}$. C) Z$_{7}$X. D) Z$_{2}$X. Show Answer Correct Answer: A) ZX. 18. 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) A sea of electrons surrounds the ions. D) Neutral molecules are present. Show Answer Correct Answer: B) Ions are surrounded by ions of the opposite charge. 19. 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. 20. In what form do elements such as hydrogen, nitrogen, and oxygen normally occur? A) As single atoms. B) As molecules containing two atoms. C) As molecules containing three atoms. D) As molecules containing four atoms. Show Answer Correct Answer: B) As molecules containing two atoms. 21. Which one of the following molecule contains both ionic and covalent bonds? (2002-E) A) CHCl. B) KSO2. C) BeCl2. D) SO2. Show Answer Correct Answer: B) KSO2. 22. What type of bond is formed by the sharing of a pair of electrons between two atoms? A) Hydrogen bond. B) Metallic bond. C) Covalent bond. D) Ionic bond. Show Answer Correct Answer: C) Covalent bond. 23. The decreasing order of bond dissociation energy of C-C, C-H and H-H bond is A) HH CH CC$\rightarrow$$\rightarrow$-. B) CC CH HH$\rightarrow$$\rightarrow$-. C) CH CC HH$\rightarrow$$\rightarrow$-. D) CC HH CH$\rightarrow$$\rightarrow$-. Show Answer Correct Answer: A) HH CH CC$\rightarrow$$\rightarrow$-. 24. The formation of a stable ionic compound from ions: A) Is always exothermic. B) May be either exothermic or endothermic. C) Is always endothermic. D) Neither absorbs nor releases energy. Show Answer Correct Answer: A) Is always exothermic. 25. The geometry of a molecule with 4 bonded pairs of electrons and 0 lone pairs of electrons A) Tetrahedral. B) Trigonal Planar. C) Bent. D) Trigonal Pyramidal. Show Answer Correct Answer: A) Tetrahedral. ← PreviousNext →Related 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 4Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 5Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 6Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 7Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 8Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 10Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books