Q.1
Choose the molecule that is incorrectly matched with the electronic geometry about the central atom.
  • CF4 - tetrahedral
  • BeBr2 - linear
  • H2O - tetrahedral
  • PF3 - pyramidal
Q.2
What is the molecular shape of a silicon dioxide molecule?
  • linear
  • trigonal planar
  • bent
  • tetrahedral
Q.3
What is the molecular geometry of carbon tetrachloride CCl4 ?
  • Linear
  • Trigonal planar
  • tetrahedral
  • trigonal pyramidal
Q.4
What molecular geometry would PH3 have?
  • Trigonal Pyramidal
  • Trigonal Bipyramidal
  • Bent
  • Linear
Q.5
How many unshared pairs of electrons will a pyramidal molecule have?
  • 1
  • 2
  • 3
  • 4
Q.6
How many unshared pairs of electrons will a bent molecule have?
  • 1
  • 2
  • 3
  • 4
Q.7
Which of the following shapes has unshared pairs of electrons on the central atom?
  • Bipyramidal
  • Bent
  • Trigonal Planar
  • Tetrahedral
Q.8
Ammonia, NHadopts a tetrahedral geometry. However, the non-bonding pair on the central nitrogen atom distorts the bond angle away from the expected 109.5°. Which of the following statements correctly describes how the bond angle is distorted?
  • The actual bond angle is reduced: it is less than 109.5°
  • The actual bond angle is increased: it is more than 109.5°
Q.9
The bond angle for a trigonal planar molecule is
  • 90 Degrees
  • 109.5 Degrees
  • 120 Degrees
  • 180 Degrees
Q.10
How many different bond angles will a Trigonal Bipyramidal molecule have?
  • 1
  • 2
  • 3
  • 4
Q.11
Which shapes are altered by unshared pairs of electrons?
  • Bent and Pyramidal
  • Trigonal Planar and Bent
  • Tetrahedram and Bipyramidal
  • Pyramidal and Linear
Q.12
What is the bond angle for a pyramidal molecule?
  • 90
  • 107
  • 109.5
  • 120
Q.13
What is the bond angle in a bent molecule?
  • 90
  • 105
  • 107
  • 180
Q.14
What shape would PH3 have?
  • Trigonal Planar
  • Trigonal Bipyramidal
  • Bent
  • Linear
Q.15
Which of the following shapes has an unshared pairs of electrons on the central atom?
  • Bipyramidal
  • Bent
  • Trigonal Planar
  • Tetrahedral
Q.16
Molecules such as boron trichloride that have three bonded atoms and no unshared pairs have what shape?
  • trigonal planar
  • trigonal pyramidal
  • trigonal bipyramidal
  • tetrahedral
Q.17
The acronym VSEPR stand for
  • very strong electron pair repulsion.
  • varied symmetry electrostatic proton reaction.
  • venomous snakes enjoy pink ribbons.
  • valence shell electron pair repulsion.
Q.18
VSEPR theory is used to predict
  • the number of unshared pairs of electrons in a Lewis structure.
  • the number of multiple bonds in a Lewis structure.
  • the three-dimensional geometry of a molecule.
  • the three-dimensional crystal lattice structure of ionic compounds.
Q.19
Any molecule with only two atoms must be linear. Three-atom molecules such as BeCl2 can also be linear. For linear molecules, the bond angle is
  • 360°360\degree360°
  • 180°180\degree180°
  • 120°120\degree120°
  • 90°90\degree90°
Q.20
The atoms in a molecule of water adopt what kind of geometry?
  • Linear
  • Tetrahedral
  • Bent
  • Trigonal planar
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