HL Topics 4 & 14 Chemical bonding & structure (First test) For each question choose the answer you consider to be the best. 1. What are the correct formulas for magnesium sulfate and aluminium phosphide? A. Mg(SO4)2 and AlPO4 B. MgSO4 and AlPO4 C. MgSO4 and AlP D. Mg(SO4)2 and AlP 2. Metal M shows only one oxidation state when it forms compounds. The formula of the oxide of M is M2O3? Which is the correct formula for another of the compounds M forms? A. M3P2 B. MP C. M2P D. M2P3 3. Which describes ionic bonding best? A. The electrostatic attraction between nuclei and pairs of electrons B. The electrostatic attraction between positive ions and negative ions C. The electrostatic attraction between a positive ion and an electron D. The electrostatic attraction between protons and electrons © Dr Geoffrey Neuss, InThinking http://www.thinkib.net/chemistry 1 4. Which statements accurately describe the structure of solid sodium chloride? I. It is an ionic lattice II. Each sodium ion is surrounded by six chloride ions III. The sodium ions are arranged octahedrally around each chloride ion A. I and II only B. I and III only C. II and III only D. I, II and III 5. Which molecule or ion contains a coordinate (dative) bond? A. CO2 B. C2H4 C. OHD. NH4+ 6. Which statement best describes the intramolecular bonding in ammonia? A. Van der Waals’ forces and hydrogen bonding B. Electrostatic attraction between nuclei and shared pairs of electrons C. London dispersion forces only D. Hydrogen bonding only © Dr Geoffrey Neuss, InThinking http://www.thinkib.net/chemistry 2 7. Which statements are correct about carbon to oxygen bond lengths? I. The C to O bond lengths are equal in CH3COOH. II. The C to O bond length in carbon monoxide is shorter than the C to O bond length in carbon dioxide. III. The C to O bond lengths in the ethanoate ion, CH3COO- , are equal. A. I and II only B. I and III only C. II and III only D. I, II and III 8. What is VSEPR (Valence Shell Electron Pair Repulsion theory) used for? A. To predict the Lewis structure of a molecule B. To show the arrangement of energy levels in a particular atom C. To deduce the shape of a molecule or simple ion D. To deduce the type of bonding in a compound 9. What is the O-N-O bond angle in the NO3- ion? A. 109.5o B. 120o C. between 100o and 109o D. 90o © Dr Geoffrey Neuss, InThinking http://www.thinkib.net/chemistry 3 10. How many bonding pairs and non-bonding pairs of electrons are around the sulfur atom in a molecule of SCl4? 11. Which molecules or ion contain a bond angle less than 109o? I. NH3 II. CCl4 III. H3O+ A. I and II only B. I and III only C. II and III only D. I, II and III 12. Which shows the increasing order of oxygen to oxygen bond lengths in oxygen, ozone and hydrogen peroxide? A. O2 < O3 < H2O2 B. O3 < O2 < H2O2 C. H2O2 < O2 < O3 D. O3 < H2O2 < O2 © Dr Geoffrey Neuss, InThinking http://www.thinkib.net/chemistry 4 13. What is the shape of the ICl4- ion? A. Tetrahedral B. Square pyramidal C. Octahedral D. Square planar 14. Which combination shows the number of non-bonded electron pairs in the Lewis structure, the shape of the molecule and the type of hybridization present in a molecule of dichloromethane, CH2Cl2? 15. Which is a correct statement about the NO2– ion? A. The N atom is sp2 hybridized B. The ion has a linear shape C. There are two non-bonded pairs of electrons on the N atom D. There are double bonds between the N atom and the two O atoms © Dr Geoffrey Neuss, InThinking http://www.thinkib.net/chemistry 5 16. What is the geometry of the bonds around an atom that is sp hybridised? A. 4 bonds at 90o B. 4 bonds at 109.5o C. 3 bonds at 120o D. 2 bonds at 180o 17. Which types of hybridization are shown by the carbon atoms in propene? I. sp3 II. sp2 III. sp A. I and II only B. I and III only C. II and III only D. I, II and III © Dr Geoffrey Neuss, InThinking http://www.thinkib.net/chemistry 6 18. Which contain delocalized electrons? I. CO II. O3 III. CH3COO- A. I and II only B. I and III only C. II and III only D. I, II and III 19. Which types of hybridization are present in but-1-yne, CH3CH2CCH? A. sp, sp2 and sp3 B. sp and sp3 only C. sp2 and sp3 only D. sp and sp2 only 20. Which will not conduct electricity? A. Hg(l) B. NaCl(s) C. PbBr2(l) D. HCl(aq) © Dr Geoffrey Neuss, InThinking http://www.thinkib.net/chemistry 7
