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

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