Toronto High School
CHEMISTRY 100
SCH4U – Quiz Chapter 4: Structure and Properties Name:__________ /20 1. The bond angles in methane (CH4) will be? a) 90 b) 109.5 c) 180 d) 120 e) just under 109.5 2. The shape of the ammonium ion [NH4] + will be? a) trigonal planar b) tetrahedral c) trigonal pyramidal d) trigonal bipyramidal e) octahedral 3. Graphite conducts elec
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SCH4U – Quiz Chapter 4: Structure and Properties Name:__________ /20 1. The bond angles in methane (CH4) will be? a) 90 b) 109.5 c) 180 d) 120 e) just under 109.5 2. The shape of the ammonium ion [NH4] + will be? a) trigonal planar b) tetrahedral c) trigonal pyramidal d) trigonal bipyramidal e) octahedral 3. Graphite conducts electricity because? a) there are only weak interactions between layers of carbon atoms. b) some of the valence electrons are delocalized. c) it is a metal. d) all of the bonds are covalent. e) carbon atoms are arranged in a series of hexagons. 4. Which of the following molecules will be polar? a) CF4 b) NO2 - c) BeCl2 d) C2H6 e) CO2 5. Which intermolecular forces exist between molecules of nitrogen trichloride? a) dispersion forces b) dispersion forces and dipole-dipole attractions c) dispersion forces and hydrogen bonds d) dipole-dipole attractions e) hydrogen bonds Section B: Written Answer Answer each question in the space provided. 6. Use a Lewis structure and VSEPR theory to predict the shape of the following molecules. [4] a) the formaldehyde molecule (chemical formula H2CO) b) the carbonate ion (CO3 2-)
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