This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The geometry of a molecule with 1 bonded pair of electrons and 1 lone pair of electrons A) Tetrahedral. B) Trigonal Planar. C) Bent. D) Trigonal Pyramidal. E) Linear. Show Answer Correct Answer: E) Linear. 2. Which one has a pyramidal shape? A) SO$_{3}$. B) PCl$_{3}$. C) CO$_{3}$ $^{2-}$. D) NO$_{3}$ $^{-}$. Show Answer Correct Answer: B) PCl$_{3}$. 3. Which of the following best describes bond length? A) The distance between two molecules of the same substance. B) The distance between the nuclei of two attached atoms. C) The distance between the electrons in two attached atoms. D) The distance between the orbitals of two attached atoms. Show Answer Correct Answer: B) The distance between the nuclei of two attached atoms. 4. What is the significance of valence electrons in chemical bonding? A) Valence electrons repel each other, preventing bonding. B) Valence electrons are only present in noble gases. C) Valence electrons have no impact on chemical bonding. D) Valence electrons play a crucial role in forming chemical bonds between atoms. Show Answer Correct Answer: D) Valence electrons play a crucial role in forming chemical bonds between atoms. 5. The 2 shared electrons that hold the molecule together A) Lone pair. B) Central atom. C) Bonded pair. D) Terminal atom. Show Answer Correct Answer: C) Bonded pair. 6. A valid Lewis structure of ..... cannot be drawn without violating the octet rule. A) NF$_{3}$. B) IF$_{3}$. C) PF$_{3}$. D) SbF$_{3}$. Show Answer Correct Answer: B) IF$_{3}$. 7. What is the term for the energy required to break one mole of bonds in a gaseous state? A) Bond length. B) Bond enthalpy. C) Bond order. D) Bond energy. Show Answer Correct Answer: B) Bond enthalpy. 8. How many electrons can be used in the Lewis Structure for:NO$_{3}$- A) 23. B) 20. C) 18. D) 24. Show Answer Correct Answer: D) 24. 9. Which of the following best describes the molecular structure of water (H2O)? A) Linear. B) Bent. C) Tetrahedral. D) Trigonal Planar. Show Answer Correct Answer: B) Bent. 10. What is the primary factor that determines the strength of a covalent bond? A) Type of atoms involved. B) Extent of overlap. C) Number of electrons. D) Bond length. Show Answer Correct Answer: B) Extent of overlap. 11. Explain the difference between cations and anions. A) Cations are negatively charged ions, and anions are positively charged ions. B) Cations have a higher electron affinity than anions. C) Cations are positively charged ions, and anions are negatively charged ions. D) Cations are larger in size compared to anions. Show Answer Correct Answer: C) Cations are positively charged ions, and anions are negatively charged ions. 12. Determine the hybridisation of PCl5 A) Sp3. B) Sp3d2. C) Sp3d. D) None of the above. Show Answer Correct Answer: C) Sp3d. 13. The formula unit of an ionic compound shows the: A) Total number of each kind of ion in a sample. B) Simplest ratio of the ions. C) Numbers of atoms within each molecule. D) Number of nearest neighboring ions surrounding each kind of ion. Show Answer Correct Answer: B) Simplest ratio of the ions. 14. Which of the following hybridisation leads to square planer geometry? A) Sp3. B) Sp3. C) Dsp2. D) Sp3d. Show Answer Correct Answer: C) Dsp2. 15. The elevtrovalence is thus ..... (a) ..... to the number of unit charge on ..... (b) ..... ? A) A:half ; b:stable atom. B) A:equal ; b:ion. C) A:equal ; b:anion. D) None of the above. Show Answer Correct Answer: B) A:equal ; b:ion. 16. A three-dimensional arrangement of particles in an ionic solid is called a(n): A) Crystal lattice. B) Sea of electrons. C) Formula unit. D) Electrolyte. Show Answer Correct Answer: A) Crystal lattice. 17. A lone pair is defined as A) A pair of bonding electrons. B) One non-bonding electron. C) A pair of non-bonding electrons. D) A pair of electrons on the central atom. Show Answer Correct Answer: C) A pair of non-bonding electrons. 18. Which type of bond is formed by an overlap of p orbitals? A) Pi. B) Sigma. C) Both. D) Neither. Show Answer Correct Answer: C) Both. 19. What is the electron configuration of sodium? A) 2.8. B) 2.8.2. C) 2.8.1. D) 11. Show Answer Correct Answer: C) 2.8.1. 20. If the boiling point of ethanol (molecular weight-46) is 78$^\circ$C. What is the boiling point of diethyl ether (molecular weight=74)? (2004-M) A) 100$^\circ$C. B) 78$^\circ$C. C) 86$^\circ$C. D) 34$^\circ$C. Show Answer Correct Answer: D) 34$^\circ$C. 21. Salts are examples of: A) Nonionic compounds. B) Metals. C) Nonmetals. D) Ionic compounds. Show Answer Correct Answer: D) Ionic compounds. 22. What is the geometry of a molecule in which the central atom has no lone pair and 3 bonding pairs? A) Bent. B) Trigonal Planar. C) Tetrahedral. D) Linear. Show Answer Correct Answer: B) Trigonal Planar. 23. Structural Formula A) A chemical formula that shows the arrangement of atoms in a molecule or a polyatomic ion. B) A property that describes the ability of the material to be pulled into thin wire without breaking. C) The arrangement of electrons in relation to the central atom of the molecule. D) The valence electrons in an atom that are bonded or shared with other atoms. Show Answer Correct Answer: A) A chemical formula that shows the arrangement of atoms in a molecule or a polyatomic ion. 24. In NO$_{3}$$^{-}$ ion, the number of bond pairs and lone pairs of electrons on nitrogen atom are A) 2, 2. B) 3, 3. C) 1, 3. D) 4, 0. Show Answer Correct Answer: D) 4, 0. 25. What is the concept that atoms combine either by transfer of valence electrons or by sharing of valence electrons to have an octet in their valence shells? A) Lewis Structure. B) Molecular Orbital Theory. C) Octet Rule. D) Hybridization. Show Answer Correct Answer: C) Octet Rule. ← 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 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 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