Chem 1010 - General Chemistry 1 » Summer 2022 » Quiz 6

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Question #1
VSEPR is based upon what principle?
A.   The size of the electrons in the valence shell of a molecule determines the shape of the molecule.
B.   The attraction of electrons in the valence shell of a molecule determines the shape of the molecule.
C.   The velocity of the electrons in the valence shell of a molecule determines the shape of the molecule.
D.   The repulsion of electrons in the valence shell of a molecule determines the shape of the molecule.
Question #2
VSEPR Theory attempts to ____ electron-pair ____.
A.   maximize, attractions
B.   minimize, repulsions
C.   eliminate, attractions
D.   maximize, repulsions
Question #3
Which of the following central atoms would be expected to accommodate more than four electron pairs in some of its compounds?
A.   Helium
B.   Boron
C.   Krypton
D.   Carbon
Question #4
Use VSEPR Theory to predict the electron-pair geometry and the O-C-O bond angles for CO32
A.   bent, 180°
B.   triangular planar, 120°
C.   bent, 120°
D.   linear, 180°
Question #5
Use VSEPR Theory to predict the X-A-X angles for the following compounds: CO2, GeF4, BCl3
A.   109.5°, 90°, 109.5°
B.   180°, 90°, 120°
C.   180°, 109.5°, 120°
D.   109.5°, 109.5°, 109.5°
Question #6
Which of the following has a triangular pyramidal molecular geometry? I. nitrite ion II. hydronium ion III. sulfite ion IV. carbonate ion
A.   I and II
B.   I and III
C.   II and IV
D.   II and III
Question #7
Which of the following correctly list the relative strengths of electron-pair repulsions?
A.   bonding pair-bonding pair > lone pair-lone pair > lone pair-bonding pair
B.   lone pair-lone pair > lone pair-bonding pair > bonding pair-bonding pair
C.   bonding pair-bonding pair > lone pair-bonding pair > lone pair-lone pair
D.   lone pair-bonding pair > lone pair-lone pair > bonding pair-bonding pair
Question #8
Which of the following has the smallest bond angle?
A.   H2S
B.   SiF4
C.   SO32−
D.   NO3−
Question #9
Which description of a pi bond is false?
A.   greater orbital overlap than sigma bonds
B.   orbital overlap above and below the bonding axis
C.   electron density is not along the interatomic axis
D.   orbital overlap is between parallel orbitals
Question #10
According to valence bond theory, the carbon-carbon σ bond in acetylene, C2H2, results from the overlap of which of the following?
A.   p atomic orbitals
B.   sp2 hybrid orbitals
C.   sp hybrid orbitals
D.   sp3 hybrid orbitals

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