This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When 2 lone pairs and 2 bond pair are around the central atom, reduction in the bond angle is up to- A) 109.5$^\circ$. B) B. 104.5$^\circ$. C) 107.5$^\circ$. D) 102$^\circ$. Show Answer Correct Answer: B) B. 104.5$^\circ$. 2. The pairs of valence electrons that are not shared A) Lone pair. B) Central atom. C) Bonded pair. D) Terminal atom. Show Answer Correct Answer: A) Lone pair. 3. What is the hybridization of the central atom in BCl3? A) Sp. B) Dsp3. C) Sp2. D) Sp3. Show Answer Correct Answer: C) Sp2. 4. The bond angle for a trigonal planar molecule is A) 90 Degrees. B) 109.5 Degrees. C) 120 Degrees. D) 180 Degrees. Show Answer Correct Answer: C) 120 Degrees. 5. Lewis postulated that atoms the noble octet when they are linked by ..... A) Ionic bonds. B) Covalent bonds. C) Chemical bonds. D) None of the above. Show Answer Correct Answer: C) Chemical bonds. 6. According to VSEPR theory, what is the shape of SF$_{4}$? A) Square planar (6 bp, 2 lp). B) Trigonal bipyramidal (5 bp, 0 lp). C) See-saw shaped (4 bp, 1 lp). D) Tetrahedral (4 bp, 0 lp). Show Answer Correct Answer: C) See-saw shaped (4 bp, 1 lp). 7. In the formation of NaCl, what happens to the electron from sodium? A) It remains with sodium. B) It is gained by sodium. C) It is lost to chlorine. D) It is shared with chlorine. Show Answer Correct Answer: C) It is lost to chlorine. 8. What is the concept introduced by G.N. Lewis to represent valence electrons in an atom? A) Bohr Model. B) Lewis Symbols. C) Dalton Model. D) Rutherford Model. Show Answer Correct Answer: B) Lewis Symbols. 9. An element X reacts with chlorine to form a solid of formula XCl. What could be the electronic structure of X? A) 1s$^{2}$ 2s$^{2}$ 2p$^{4}$. B) 1s$^{2}$ 2s$^{2}$ 2p$^{6}$ 3s$^{1}$. C) 1s$^{2}$ 2s$^{2}$ 2p$^{6}$ 3s$^{2}$. D) 1s$^{2}$ 2s$^{2}$ 2p$^{6}$ 3s$^{2}$ 3p$^{5}$. Show Answer Correct Answer: B) 1s$^{2}$ 2s$^{2}$ 2p$^{6}$ 3s$^{1}$. 10. What is the shape of a molecule with the formula AB4E? A) Bent. B) Trigonal pyramidal. C) T-shaped. D) See-saw. Show Answer Correct Answer: D) See-saw. 11. Assertion (A):I3-is linear Reason (R):It is not in sp hybridised state. The correct answer is A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is not the correct explanation of A. C) A is true, R is not true. D) A is not true but R is true. Show Answer Correct Answer: B) Both A and R are true but R is not the correct explanation of A. 12. Which of the following types of hybridisation lead to three dimensional geometry of bonds around carbon atom A) Sp. B) Sp2. C) Sp3. D) None of the above. Show Answer Correct Answer: C) Sp3. 13. What is the bond angle in a water (H2O) molecule? A) 104.5 degrees. B) 120 degrees. C) 90 degrees. D) 180 degrees. Show Answer Correct Answer: A) 104.5 degrees. 14. Geometry having ..... Repulsion b/w electron pair is most suitable electronic geometry. A) Minimum. B) Maximum. C) Neutral. D) None of the above. Show Answer Correct Answer: A) Minimum. 15. What is the result of multiple bonding between two atoms? A) Sharing of one electron pair. B) Sharing of two electron pairs. C) Sharing of three electron pairs. D) Sharing of four electron pairs. Show Answer Correct Answer: B) Sharing of two electron pairs. 16. The correct decreasing order of the boiling points of H2O and NH3 is: A) H2O > NH3. B) NH3 > H2O. C) All the above. D) None of the above. Show Answer Correct Answer: A) H2O > NH3. 17. What is the octet rule primarily based on? A) The size of the atoms involved. B) The chemical inertness of noble gases. C) The chemical reactivity of alkali metals. D) The temperature of the reaction. Show Answer Correct Answer: B) The chemical inertness of noble gases. 18. What type of bond involves the overlap of parallel orbitals? A) Sigma bond. B) Pi bond. C) Ionic bond. D) Metallic bond. Show Answer Correct Answer: B) Pi bond. 19. Which one of the following statements is not correct for sigma and pi bonds between two carbon atoms? A) Sigma bond is stronger than pi bond. B) Bond energies of sigma and pi bonds are of the order of 264 kJ /mol. C) Free rotation of atoms around a sigma bond is allowed but not in case of a pi bond. D) Sigma bond is formed from hybridised orbital and pi bond is formed from unhybridised orbital. Show Answer Correct Answer: B) Bond energies of sigma and pi bonds are of the order of 264 kJ /mol. 20. Which one of the following is the correct set with reference to molecular formula, hybridisation of central atom and shape of the molecule? (2002-M) A) CO2, sp, bent. B) H2O, sp, bent. C) BeCl2, sp, linear. D) H2O, sp, linear. Show Answer Correct Answer: C) BeCl2, sp, linear. 21. In a chemistry class, Ria is learning about the formation of NaCl. She wonders what happens to the electron from sodium during this process. A) It is gained by sodium. B) It remains with sodium. C) It is lost to chlorine. D) It is shared with chlorine. Show Answer Correct Answer: C) It is lost to chlorine. 22. Which of the following has the lowest bond angle? (2000 E) A) H2O. B) CH4. C) H2S. D) NH3. Show Answer Correct Answer: C) H2S. 23. Which of the following molecule is T shaped? A) SF4. B) ClF3. C) H2O. D) NH3. Show Answer Correct Answer: B) ClF3. 24. Why do molecules like hydrogen and oxygen exist as diatomic molecules rather than single atoms? A) Single atoms are unstable and have incomplete electron shells. B) Single atoms are too large to exist independently. C) Single atoms have too many electrons to form bonds. D) Single atoms are more reactive than diatomic molecules. Show Answer Correct Answer: A) Single atoms are unstable and have incomplete electron shells. 25. In VSEPR theory, which type of electron pair has the greatest repulsion? A) Bond pair-bond pair. B) Bond pair-lone pair. C) Lone pair-bond pair. D) Lone pair-lone pair. Show Answer Correct Answer: D) Lone pair-lone pair. ← 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 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