True/False -- Indicate whether the statement is true or false.
(Vrai / Faux - indiquer si l'énoncé est vrai ou faux.)
1.
Possible shapes of AB3 molecules are linear, trigonal planar, and T-shaped.
(Une molécule de formule AB3 peut avoir une géométrie linéaire, trigonal planaire ou en forme de « T ».)
2. Boron trifluoride has three bonding domains and its electron domain geometry is trigonal planar.
(Le trifluorure de bore a trois centres de liaison et sa géométrie stérique (des doublets d’électrons de valences) est
trigonale planaire.)
Multiple Choice -- Identify the choice that best completes the statement or answers the question.
(Choix Multiple - Identifier le choix qui complète le mieux l'énoncé ou répond à la question. )
3. For a molecule with the formula AB2 the molecular shape is
a. linear or bent b. linear or trigonal planar
c. linear or T-shaped d. T-shaped e. trigonal planar.
4.
5.
.
The electron-domain geometry and molecular geometry of iodine trichloride are
and
, respectively.
a. trigonal bipyramidal, trigonal planar b. tetrahedral, trigonal pyramidal c. trigonal bipyramidal,
T-shaped d. octahedral, trigonal planar e. T-shaped, trigonal planar
The molecular geometry of the SiH2Cl2 molecule is
.
a. trigonal planar b. tetrahedral c. trigonal pyramidal d. octahedral e. T-shaped
6.
The molecular geometry of the SF2 molecule is
.
a. linear b. bent c. trigonal planar d. tetrahedral e. octahedral
7.
The molecular geometry of the PF4+ ion is
.
a. octahedral b. tetrahedral c. trigonal pyramidal d. trigonal planar e. trigonal bipyramidal.
8.
9.
The hybridization of orbitals on the central atom in a molecule is sp. The electron-domain geometry around this
central atom is
.
a. octahedral b. linear c. trigonal planar d. trigonal bipyramidal e. tetrahedral
The Cl-Si-Cl bond angle in the SiCl2F2 molecule is approximately
a. 90° b. 109.5° c. 120° d. 180° e. 60°
10.
The hybridization of the central atom in the XeF4 molecule is
a. sp b. sp c. sp d. sp d e. sp d
11.
The O-S-O bond angle in SO2 is slightly less than ______.
a. 90° b. 109.5° c. 120° d. 180° e. 60°
.
.
12. There are
σ and
π bonds in the H–C≡C–H molecule.
a. 3 and 2 b. 3 and 4 c. 4 and 3 d. 2 and 3 e. 5 and 0
1
13.
There is/are
σ bond(s) in the molecule below.
a. 1 b. 2 c. 12 d. 13 e. 18
14.
The Lewis structure of carbon monoxide is given below. The hybridizations of the carbon and
oxygen atoms in carbon monoxide are
and
, respectively.
: C≡O:
a. sp, sp3 b. sp2, sp3 c. sp3, sp2 d. sp, sp e. sp2, sp2
15.
According to VSEPR theory, if there are three electron domains in the valence shell of an atom, they will be
arranged in a(n)
geometry.
a. octahedral b. linear c. tetrahedral d. trigonal planar e. trigonal bipyramidal
(Selon la théorie VSEPR, s’il y a trois doublets d’électrons de valence, ils adopteront une géométrie .
a. octaédrique b. linéaire c. planaire trigonale d. bipyramide à base triangulaire)
16.
The electron domain and molecular geometry of BrO2- is
.
a. tetrahedral, trigonal planar b. trigonal planar, trigonal planar c. trigonal pyramidal, linear
d. tetrahedral, bent e. trigonal pyramidal, seesaw
17.
Of the following species,
will have bond angles of 120°.
a. PH3 b. ClF3 c. NCl3 d. BCl3 e. All of these will have bond angles of 120°.
18.
The molecular geometry of the BrO3- ion is
.
a. trigonal pyramidal b. trigonal planar c. bent d. tetrahedral e. T-shaped
19.
The molecular geometry of the right-most carbon in the molecule below is .
a. trigonal planar b. trigonal bipyramidal c. tetrahedral d. octahedral e. T-shaped
2
20. The bond angles marked a, b, and c in the molecule below are about
, respectively.
,
, and
a. ( 90°, 90°, 90°) b. (120°, 120°, 90°) c. ( 20°, 120°, 109.5°) d. (109.5°, 120°, 109.5°)
e. ( 109.5°,90°, 120°)
21. The central iodine atom in IF5 has
valence shell.
a. 1, 5 b. 0, 5 c. 5, 1 d. 4, 1 e. 1, 4
unbonded electron pairs and
bonded electron pairs in its
22. According to VSEPR theory, if there are three electron domains on a central atom, they will be arranged such that
the angles between the domains are
.
a. 90° b. 180° c. 109.5° d. 360° e. 120°
23.
The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn are .
a. never the same b. always the same c. sometimes the same d. not related e. mirror images of one another
(La géométrie stérique (géométrie des doublets) et la géométrie moléculaire d’une molécule ABn _______.
a. ne sont jamais les mêmes b. sont toujours les mêmes c. sont parfois les mêmes
d. ne sont aucunement reliées e. sont des images miroir l’une de l’autre)
24.
A molecule has the formula AB3 and the central atom is in a different plane from the surrounding three atoms.
Its molecular shape is
. a. tetrahedral b. trigonal pyramidal c. linear d. T-shaped
e. bent
(Une molécule est de formule AB3 et son atome central n’est pas dans le plan formé par les trois ligands. Sa
géométrie sera _______.
a. tétraèdrique b. pyramidal trigonal c. linéaire d. en forme de T e. coudée)
25.
Of the molecules below, only
26.
Of the molecules below, only
is nonpolar.
a. BF3 b. NF3 c. IF3 d. PBr3 e. BrCl3
27.
The molecular geometry of the PF3 molecule is
, and this molecule is
a. trigonal planar, polar b. trigonal planar, nonpolar c. trigonal pyramidal, polar
d. trigonal pyramidal, nonpolar e. tetrahedral, unipolar
is polar. a. SbF5 b. AsH3 c. I2 d. SF6 e. CH4
.
28. The molecular geometry of the BCl3 molecule is
, and this molecule is .
a. trigonal pyramidal, polar b. trigonal pyramidal, nonpolar c. trigonal planar, polar d. trigonal planar,
nonpolar e. trigonal bipyramidal, polar
29. The electron-domain geometry of a carbon-centered compound is tetrahedral. The hybridization of the central
carbon atom is
.
a. sp b. sp2 c. sp3 d. sp3d e. sp3d2
3
30. Of the following, the central atom is sp3d2 hybridized only in
a. PCl5 b. XeF4 c. PH3 d. Br3- e. BeF2
.
31. The hybrid orbitals used for bonding by the sulfur atom in the SF4 molecule are
a. sp b. sp2 c. sp3 d. sp3d e. sp3d2
orbitals.
32. The hybridization of the oxygen atom labeled y in the structure below is
.
. The C-O-H bond angle is
a. sp, 180° b. sp2, 109.5° c. sp3, 109.5° d. sp3d2, 90° e. sp, 90°
33. There are
unhybridized p atomic orbitals in an sp-hybridized carbon atom.
a. 0 b. 1 c. 2 d. 3 e. 4
34. When three atomic orbitals are mixed to form hybrid orbitals, how many hybrid orbitals are formed?
a. one b. six c. three d. four e. five
35. The carbon-carbon σ bond in ethylene, H2C=CH2, results from the overlap of
.
a. sp hybrid orbitals b. sp3 hybrid orbitals c. sp2 hybrid orbitals d. s atomic orbitals e. p atomic orbitals
36. The π bond in ethylene, H2C=CH2, results from the overlap of
.
3
a. sp hybrid orbitals b. s atomic orbitals c. sp hybrid orbitals d. sp2 hybrid orbitals e. p atomic orbitals
37. The hybridization of nitrogen in the H–C≡N: molecule is
a. sp b. s2p c. s3p d. sp2 e. sp3
38.
.
The Lewis structure of carbon dioxide is given below. The hybridization of the carbon atom in carbon dioxide
is
.
a. sp3 b. sp2 c. sp d. sp2d e. sp2d2
39.
Using the VSEPR model, the electron-domain geometry of the central atom in SF2 is
a. linear b. trigonal planar c. tetrahedral d. trigonal bipyramidal e. octahedral
40. Using the VSEPR model, the molecular geometry of the central atom in SO2 is
a. linear b. trigonal planar c. tetrahedral d. bent e. trigonal pyramidal
4
.
.