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 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 5 (29 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What are the different types of atomic orbitals? A) S, p, d, f. B) A. C) C. D) B. Show Answer Correct Answer: A) S, p, d, f. 2. Which of the following is not correct regarding the properties of ionic compounds (2004-E) A) Ionic compounds have high melting and boiling points. B) Their reaction velocity in aqueous medium is very high. C) Ionic compounds in their molten and aqueous solutions do not conduct electricity. D) They are highly soluble in polar solvents. Show Answer Correct Answer: C) Ionic compounds in their molten and aqueous solutions do not conduct electricity. 3. Ionic compounds tend to have ..... melting and boiling points as the forces of electrostatic attraction between the ions in the lattice are ..... and so require ..... amounts of heat energy to break. A) High, Strong, Large. B) Low, Weak, Less. C) Low, Strong, Less. D) High, Weak, Less. Show Answer Correct Answer: A) High, Strong, Large. 4. Which electrons from the metal make up the delocalized electrons? A) Bonding electrons. B) Core electrons. C) Valence electrons. D) Free electrons. Show Answer Correct Answer: C) Valence electrons. 5. What is the measure of a tetrahedral bond angle? A) 109.5 Degrees. B) 180 Degrees. C) 120 Degrees. D) 90 Degrees. Show Answer Correct Answer: A) 109.5 Degrees. 6. What element forms a double bond? A) Sodium. B) Oxygen. C) Chlorine. D) Bromine. Show Answer Correct Answer: B) Oxygen. 7. What is bond enthalpy? A) The energy released when a bond is broken between two atoms. B) The amount of energy required to break one mole of bonds of a particular type between two atoms in a gaseous state. C) The energy required to form a bond between two atoms. D) The energy released when a bond is formed between two atoms. Show Answer Correct Answer: B) The amount of energy required to break one mole of bonds of a particular type between two atoms in a gaseous state. 8. As the number of covalent bonds between two atoms increases, the distance between the atoms ..... and the strength of the bond between them ..... A) Decreases, increases. B) Decreases, decreases. C) Increases, increases. D) Increases, decreases. Show Answer Correct Answer: A) Decreases, increases. 9. In which of the following substance, hydrogen bonding is absent? (2001 M) A) H2O. B) HF. C) CCl4. D) Salicylaldehyde. Show Answer Correct Answer: C) CCl4. 10. In PO$_{4}$$^{3-}$ ion the formal charge on the oxygen atom of P-O bond is A) -1. B) -0.75. C) +0.75. D) +1. Show Answer Correct Answer: A) -1. 11. What is the hybridization of the central atom in methane (CH4)? A) Sp3. B) Dsp3. C) Sp. D) Sp2. Show Answer Correct Answer: A) Sp3. 12. Which of the following statement is correct about CO3$^{2-}$? A) The hybridisation of central atom is Sp3. B) Its canonical structure has one C O single bond and two C=O double bonds. C) All C O bond lengths bond lengths are equal. D) Canonical structures are less stable. Show Answer Correct Answer: C) All C O bond lengths bond lengths are equal. 13. What type molecules liquid to gas? A) Vaporization. B) Freezing. C) Melting. D) None of the above. Show Answer Correct Answer: A) Vaporization. 14. Which of the following best describes the concept of resonance? A) A single Lewis structure can accurately represent a molecule. B) Multiple structures are used to represent a molecule's true nature. C) Resonance structures have real existence. D) Resonance does not affect the stability of a molecule. Show Answer Correct Answer: B) Multiple structures are used to represent a molecule's true nature. 15. What is the attachment between atoms called when sharing of electrons occurs? A) Ionic bond. B) Covalent bond. C) Metallic bond. D) Hydrogen bond. Show Answer Correct Answer: B) Covalent bond. 16. Which of the following molecules is not an exception to octet rule? A) PF5. B) CO2. C) BF3. D) IF7. Show Answer Correct Answer: B) CO2. 17. What is the Bohr model of the atom? A) The Bohr model of the atom suggests that protons and neutrons are located in the electron cloud. B) The Bohr model of the atom proposes that electrons are stationary within the nucleus. C) The Bohr model of the atom states that electrons move randomly around the nucleus. D) The Bohr model of the atom describes electrons orbiting the nucleus in specific energy levels. Show Answer Correct Answer: D) The Bohr model of the atom describes electrons orbiting the nucleus in specific energy levels. 18. Which one of the following is the correct set with respect to molecule, hybridization and shape? (2003-M) A) BCl3, tetrahedral. B) BeCl2, triangular planar. C) BeCl2, sp, linear. D) BCl3, triangular planar. Show Answer Correct Answer: D) BCl3, triangular planar. 19. According to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible? A) Inner shell electrons. B) Pairs of valence electrons. C) Electrons closest to the nucleus. D) Mobile Electrons. Show Answer Correct Answer: B) Pairs of valence electrons. 20. Which of the following molecule has zero dipole moment? A) H2O. B) BeCl2. C) HCl. D) NH3. Show Answer Correct Answer: B) BeCl2. 21. Which of the following hydrocarbon has least carbon-carbon bond length? (2000 E) A) C6H6. B) C2H2. C) C2H6. D) C2H4. Show Answer Correct Answer: B) C2H2. 22. The number of all possible resonance structures of nitrate ion, NO$_{3}$$^{-}$ is A) 3. B) 2. C) No resonance. D) 4. Show Answer Correct Answer: A) 3. 23. Which type of hydrogen bond occurs between different molecules? A) Ionic bond. B) Covalent bond. C) Intramolecular hydrogen bond. D) Intermolecular hydrogen bond. Show Answer Correct Answer: D) Intermolecular hydrogen bond. 24. Explain what holds the metal atoms together in the solid. A) Ionic bonds. B) Covalent bonds. C) Metallic bonds. D) Hydrogen bonds. Show Answer Correct Answer: C) Metallic bonds. 25. Which of the following best describes resonance structures? A) They are only applicable to diatomic molecules. B) They represent the actual structure of a molecule. C) They are different ways to represent the same molecule. D) They indicate the presence of ionic bonds. Show Answer Correct Answer: C) They are different ways to represent the same molecule. 26. The hybridization of orbitals of N atom in NO$_{3}$$^{-}$, NO$_{2}$$^{+}$ and NH$_{4}$$^{+}$ are respectively A) Sp, sp3, sp2. B) Sp2, sp3, sp. C) Sp2, sp, sp3. D) Sp, sp2, sp3. Show Answer Correct Answer: C) Sp2, sp, sp3. 27. What is the relationship between lattice energy and the strength of the attractive force holding ions in place? A) The more positive the lattice energy is, the greater the force. B) There is no relationship between the two quantities. C) The closer the lattice energy is to zero, the greater the force. D) The more negative the lattice energy is, the greater the force. Show Answer Correct Answer: D) The more negative the lattice energy is, the greater the force. 28. What is the relationship between atomic mass and isotopes? A) Isotopes of the same element have identical atomic masses. B) Isotopes of the same element have different atomic masses. C) Isotopes have no impact on atomic mass. D) Atomic mass is not related to isotopes. Show Answer Correct Answer: B) Isotopes of the same element have different atomic masses. 29. Which excited state of Boron (B) in BCl3 participate to form hybridised orbitals before reacting with Chlorine (Cl)? A) 3. B) 1. C) 2. D) None of the above. Show Answer Correct Answer: B) 1. ← PreviousRelated 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 4Class 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