Molecular Geometry - Validation Quiz Notes PDF

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The ion PO43- has ________ valence electrons.! Select one:! A. 24! B. 32 C. 27! D. 29! E. 14! The Cl-Si-Cl bond angle in the SiCl2F2 molecule is approximately ________.! Select one:! A. 180°! B. 90°! C. 109.5° D. 120°! E. 60°! The central Xe atom in the XeF4 molecule has ________ unbonded electron pairs and ________ bonded electron pairs in its valence shell.! Select one:! A. 4, 1! B. 1, 4! C. 4, 0! D. 2, 4 E. 4, 2! The molecular geometry of the PF4+ ion is ________.! Select one:! A. trigonal bipyramidal! B. trigonal pyramidal! C. tetrahedral D. trigonal planar! E. octahedral! The electron-domain geometry and molecular geometry of iodine trichloride are ________ and ________, respectively.! Select one:! A. octahedral, trigonal planar! B. trigonal bipyramidal, T-shaped C. T-shaped, trigonal planar! D. trigonal bipyramidal, trigonal planar! E. tetrahedral, trigonal pyramidal!

For molecules with only one central atom, having how many lone pairs on the central atom guarantees molecular polarity?! Select one:! a. 1 b. 2! c. 1 or 2! d. 3! e. 1 or 3! The molecular geometry of the BCl3 molecule is ________, and this molecule is ________.! Select one:! A. trigonal planar, nonpolar B. trigonal bipyramidal, polar! C. trigonal pyramidal, polar! D. trigonal pyramidal, nonpolar! E. trigonal planar, polar! Of the molecules below, only ________ is nonpolar.! Select one:! A. NH3! B. HCl! C. TeCl2! D. H2O! E. CO2 Three monosulfur fluorides are observed: SF2, SF4, and SF6. Of these, ________ is/are polar.! Select one:! A. SF4 only! B. SF2, SF4, and SF6! C. SF2 and SF4 only D. SF2 only! E. SF6 only! Of the following species, ________ will have bond angles of 120°.! Select one:! a. BCl3 b. ClF3! c. NCl3! d. PH3! e. All of these will have bond angles of 120°.!

Using the VSEPR model, the electron-domain geometry of the central atom in H2O is ________.! a. linear! b. trigonal planar! c. tetrahedral d. trigonal bipyramidal! e. octahedral! Using the VSEPR model, the molecular geometry of the central atom in PCl5 is ________.! A. square planar! B. tetrahedral! C. square pyramidal! D. trigonal bipyramidal E. seesaw! PCl5 has ________ electron domains and a ________ molecular arrangement.! Select one:! A. 6, seesaw! B. 6, tetrahedral! C. 5, square pyramidal! D. 5, trigonal bipyramidal E. 6, trigonal bipyramidal! Consider the following species when answering the following questions:! ! (i) PCl3 (ii) CCl4 (iii) TeCl4 (iv) XeF4 (v) SF6 For which of the molecules is the molecular geometry (shape) the same as the VSEPR electron-domain arrangement (electron-domain geometry)?! Select one:! a. (i) and (ii)! b. (i) and (iii)! c. (ii) and (v) d. (iv) and (v)! e. (v) only! The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn will always be the same if ________.! Select one:! A. there is more than one central atom! B. the octet rule is obeyed! C. there are no lone pairs on the central atom D. n is less than four! E. n is greater than four!

The molecular geometry of the SF6 molecule is ________, and this molecule is ________.! Select one:! A. trigonal planar, nonpolar! B. trigonal bipyramidal, polar! C. octahedral, nonpolar D. trigonal pyramidal, polar! E. trigonal planar, polar! Of the molecules below, only ________ is polar.! Select one:! A. SeF4 B. CCl4! C. SiCl4! D. CH4! The molecular geometry of the SiH2Cl2 molecule is ________.! Select one:! A. T-shaped! B. trigonal pyramidal! C. tetrahedral D. trigonal planar! E. octahedral! In the Lewis symbol for a sulfur atom, there are ________ paired and ________ unpaired electrons.! Select one:! A. 2, 4! B. 2, 2! C. 0, 6! D. 5, 1! E. 4, 2 The central iodine atom in IF5 has ________ unbonded electron pairs and ________ bonded electron pairs in its valence shell.! Select one:! A. 1, 4! B. 1, 5 C. 0, 5! D. 5, 1! E. 4, 1!

ClF3"has "T-shaped" geometry. How many electron lone pairs"are on the chlorine atom?! Select one:! a. 0! b. 3! c. 2 d. 4! e. 1! The molecular geometry of ________ is square planar.! Select one:! A. CCl4! B. PH3! C. XeF4 D. ICl3! E. XeF2! The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn are ________.! Select one:! A. mirror images of one another! B. sometimes the same C. never the same! D. always the same! The molecular geometry of the CHF3 molecule is ________, and the molecule is ________.! Select one:! A. tetrahedral, polar B. seesaw, polar! C. tetrahedral, nonpolar! D. seesaw, nonpolar! E. trigonal pyramidal, polar! The molecular geometry of the PF3 molecule is ________, and this molecule is ________.! Select one:! A. trigonal pyramidal, polar B. trigonal planar, polar! C. trigonal pyramidal, nonpolar! D. trigonal planar, nonpolar! E. tetrahedral, unipolar!

The molecular geometry of the CHCl3 molecule is ________.! Select one:! A. trigonal pyramidal! B. tetrahedral C. trigonal planar! D. bent! E. T-shaped! In counting the electron domains around the central atom in VSEPR theory, a ________ is not included.! Select one:! A. triple covalent bond! B. double covalent bond! C. nonbonding pair of electrons! D. core level electron pair E. single covalent bond! The F-N-F bond angle in the NF3 molecule is slightly less than ________.! Select one:! A. 180°! B. 120°! C. 109.5° D. 60°! E. 90°! The F-B-F bond angle in the BF2- ion is approximately ________.! Select one:! A. 120° B. 60°! C. 180°! D. 109.5°! E. 90°! The structure of ammonia (NH3) is shown below. "Give the correct name for the electron pair geometry and the molecular structure (i.e. structure of nuclei).! a. Electron pair geometry is octahedral; "molecular structure is triangular! b. Electron pair geometry is tetrahedral; !molecular structure is pyramidal! c. Electron pair geometry is pyramidal; "molecular structure is trigonal planar! d. Electron pair geometry is tetrahedral; "molecular structure is tetrahedral! e. Electron pair geometry is square planar; "molecular structure is trigonal planar

Of the following molecules, only ________ is polar.! Select one:! A. BeCl2! B. CCl4! C. NCl3 D. BCl3! E. Cl2 Of the molecules below, only ________ is nonpolar.! Select one:! A. BF3 B. BrCl3! C. IF3! D. NF3! E. PBr3! The Lewis structure of PF3 shows that the central phosphorus atom has ________ nonbonding and ________ bonding electron pairs.! Select one:! A. 3, 1! B. 3, 3! C. 2, 2! D. 1, 3 E. 1, 2! The Lewis structure of HCN (H is bonded to C) shows that ________ has ________ nonbonding electron pairs.! Select one:! A. N, 2! B. C, 1! C. N, 1 D. H, 1! E. C, 2! A molecule has the formula AB3 and the central atom is in a different plane from the surrounding three atoms. Its molecular shape is ________.! Select one:! A. bent! B. T-shaped! C. tetrahedral! D. trigonal pyramidal E. linear!

For a molecule with the formula AB3, the molecular shape is ________.! Select one:! A. tetrahedral! B. trigonal planar, trigonal pyramidal, or T-shaped C. linear, octahedral, or bent! D. linear, bent, or trigonal planar! E. linear, bent, or T-shaped! The electron-domain geometry of ________ is tetrahedral.! Select one:! a. CBr4! b. CCl2Br2! c. all of the other options d. PH3! e. CH4! Of the following molecules, only ________ is polar.! Select one:! A. Cl2! B. BeCl2! C. SiH2Cl2 D. BF3! E. CBr4! Of the molecules below, only ________ is nonpolar.! Select one:! A. TeCl2! B. HCl! C. NH3! D. CO2 E. H2O! The bond angles in a trigonal planar molecule are ________ degrees.! Select one:! A. 45! B. 120 C. 90! D....