This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What theory explains the formation of chemical bonds based on atomic orbitals, electronic configurations, and overlap criteria? A) Valence Bond Theory. B) Molecular Orbital Theory. C) VSEPR Theory. D) Lewis Theory. Show Answer Correct Answer: A) Valence Bond Theory. 2. The sp$^{3}$d$^{2}$ hybridization of central atom of a molecule would lead to A) Square planar geometr. B) Tetrahedral geometry. C) Trigonal bipyramidal geometry. D) Octahedral geometry. Show Answer Correct Answer: D) Octahedral geometry. 3. In a DNA molecule, which type of bond holds the two strands together? A) Ionic bonds. B) Covalent bonds. C) Hydrogen bonds. D) Metallic bonds. Show Answer Correct Answer: C) Hydrogen bonds. 4. Which of the following statement is wrong for hyrogen bond? A) Hydrogen bond is weaker than covalent bond. B) Hydrogen bond is stronger than vander waals forces of attraction. C) Intermolecular hydrogen bonding is weaker han intramolecular hydrogen bond. D) None of the above. Show Answer Correct Answer: C) Intermolecular hydrogen bonding is weaker han intramolecular hydrogen bond. 5. How does the concept of bond dissociation energy relate to the stability of a molecule? A) Higher bond dissociation energy indicates a more stable molecule. B) Lower bond dissociation energy indicates a more stable molecule. C) Bond dissociation energy does not affect molecular stability. D) Bond dissociation energy is only relevant for ionic bonds. Show Answer Correct Answer: A) Higher bond dissociation energy indicates a more stable molecule. 6. Which one shows high %age of the ionic character? A) H$_{2}$O. B) HF. C) HCl. D) HBr. Show Answer Correct Answer: B) HF. 7. Which one of the following is a planar molecule? (2003-M) A) NH3. B) HO+. C) BCl3. D) PCl3. Show Answer Correct Answer: C) BCl3. 8. Which of the following statement is not correct (2004-M) A) One of the favourable conditions for the formation of cation is low ionisation potential. B) Co-ordination number of Cs in CsCl is 8. C) Ionic bond is directional. D) Ionic compounds have high melting and boiling points. Show Answer Correct Answer: C) Ionic bond is directional. 9. VSEPR is based on the assumption that A) Positive ions repel each other. B) Positive ions attract negative ions. C) Sp$^{2}$ hybridization occurs. D) Electrons in molecules repel each other. Show Answer Correct Answer: D) Electrons in molecules repel each other. 10. Is high melting point a characteristic of most metals? If yes, explain how metallic bonding accounts for this property. A) Yes, because metallic bonds are strong. B) No, because metallic bonds are weak. C) Yes, because metallic bonds are ionic. D) No, because metallic bonds are covalent. Show Answer Correct Answer: A) Yes, because metallic bonds are strong. 11. What does the lattice enthalpy of an ionic solid represent? A) The energy required to form a gas from a solid. B) The energy required to completely separate one mole of a solid ionic compound into gaseous ions. C) The energy released during the formation of a solid. D) The energy required to ionize a neutral atom. Show Answer Correct Answer: B) The energy required to completely separate one mole of a solid ionic compound into gaseous ions. 12. Explain why the bond length is shorter in a stronger bond. Which of the following is the most accurate reasoning? A) Stronger bonds have fewer electrons, reducing the distance. B) Stronger bonds involve greater overlap of orbitals, pulling nuclei closer. C) Stronger bonds involve weaker forces, allowing nuclei to come closer. D) Stronger bonds are formed by larger atoms, reducing the bond length. Show Answer Correct Answer: B) Stronger bonds involve greater overlap of orbitals, pulling nuclei closer. 13. In which type of hybridization does one s and two p orbitals mix? A) Sp3 hybridization. B) Sp hybridization. C) Sp2 hybridization. D) Dsp3 hybridization. Show Answer Correct Answer: C) Sp2 hybridization. 14. 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. 15. PCl5 molecule has the follwoing geometry A) Trigonal bipyramidal. B) Octahedral. C) Square Planar. D) Pyramidal. Show Answer Correct Answer: A) Trigonal bipyramidal. 16. 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. 17. 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. 18. Which type of bond is formed by the sharing of a pair of electrons between two atoms? A) Covalent Bond. B) Metallic Bond. C) Hydrogen Bond. D) Ionic Bond. Show Answer Correct Answer: A) Covalent Bond. 19. 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. 20. According to VSEPR theory, which of the following species has a square planar molecular structure? A) TeBr$_{4}$. B) BrF$_{3}$. C) SCl$_{2}$. D) XeF$_{4}$. Show Answer Correct Answer: D) XeF$_{4}$. 21. Among the following the maximum covalent character is shown by the compound A) MgCl$_{2 }$. B) FeCl$_{2}$. C) SnCl$_{2}$. D) AlCl$_{3}$. Show Answer Correct Answer: D) AlCl$_{3}$. 22. What is the molecular geometry of a water molecule? A) Octahedral. B) Linear. C) Tetrahedral. D) Bent. Show Answer Correct Answer: D) Bent. 23. What is the minimum energy state in the formation of a hydrogen molecule? A) When atomic orbitals overlap. B) When the bond length is zero. C) When electrons are unpaired. D) When atoms are far apart. Show Answer Correct Answer: A) When atomic orbitals overlap. 24. Which of the following molecules has a bent shape? A) CO2. B) H2O. C) CH4. D) BF3. Show Answer Correct Answer: B) H2O. 25. 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. ← 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 9Class 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