Question 1

Which of the following molecules would have a Lewis structure that most closely resembles CCl4, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

Accepted Answer

A)   SF4
B)   XeF4
C)   SiBr4
D)   IF41 - 
E)   None of theseF) B) and E)
G) A) and B)

Question 2

Pick the one statement listed below that is true .

Accepted Answer

A)   The H - S - H angle in H2S is about 180 ° .
B)   The Cl - P - Cl angles in PCl3 are all about 120 ° .
C)   The F - Al - F angles in AlF3 are all about 120 ° .
D)   The O - S - O angle in SO2 is 180 ° .
E)   All 4 answers are false.F) A) and B)
G) A) and D)

Question 3

What is the electron configuration of NO - ?

Accepted Answer

A)   ( s 2s) 2 ( s *2s) 2 ( p 2p) 4 ( s 2p) 2
B)   ( s 2s) 2 ( s *2s) 2 ( p 2p) 4 ( s 2p) 2 ( p *2p) 2
C)   ( s 2s) 2 ( s *2s) 2 ( p 2p) 4
D)   ( s 2s) 2 ( s *2s) 2 ( p 2p) 4 ( s 2p) 2 ( p *2p) 4
E)   none of theseF) B) and E)
G) A) and C)

Question 4

Three statements are given below. Pick the best answer.
I. BCl3 is a trigonal planar molecule.
II. SF6 is an octahedral molecule.
III. PH3 is a trigonal planar molecule.

Accepted Answer

A)   I and II are correct, III is not
B)   I and III are correct, II is not
C)   II and III are correct, I is not
D)   all are true
E)   only I is trueF) A) and E)
G) A) and C)

Question 5

What molecular shape is assumed by the four atoms in the nitrate anion, NO31 - ?

Accepted Answer

A)   Angular
B)   Linear
C)   Trigonal planar
D)   Trigonal pyramidal
E)   T-shapeF) None of the above
G) A) and C)

Question 6

Which of the following molecules is(are)  polar?
I. SO2 (angular) 
II. OF2 (angular) 
III. C S2 (linear)

Accepted Answer

A)   I only
B)   II only
C)   III only
D)   I and II
E)   II and IIIF) B) and D)
G) B) and C)

Question 7

Which of the following molecules is(are)  non-polar ?
I. XeF4 (square planar) 
II. CHCl3 (tetrahedral) 
III. SF4 (see-saw)

Accepted Answer

A)   I only
B)   I and II
C)   I and III
D)   II and III
E)   All of theseF) D) and E)
G) B) and C)

Question 8

Which molecule from the list below is considered polar ?
The molecular shape is listed in parenthesis.

Accepted Answer

A)   NCl3 (trigonal pyramidal) 
B)   CO2 (linear) 
C)   CH4 (tetrahedral) 
D)   N2 (linear) 
E)   SO3 (trigonal planar) F) D) and E)
G) A) and E)

Question 9

What is the steric number with respect to the central sulfur atom in the Lewis structure for sulfur dioxide, SO2?

Accepted Answer

A)   2
B)   3
C)   4
D)   5
E)   6F) B) and E)
G) A) and D)

Question 10

How many unpaired electrons are present in B2 - ?

Accepted Answer

A)   1
B)   2
C)   3
D)   0
E)   none of theseF) B) and E)
G) C) and D)

Question 11

What molecule listed below has a see-saw molecular shape?

Accepted Answer

A)   XeF4
B)   SF4
C)   SiF4
D)   CF4
E)   ClF5F) B) and E)
G) C) and D)

Question 12

What is the electron configuration of He2+?

Accepted Answer

A)   ( s ls) 2 ( s *ls) 1
B)   ( s ls) 2
C)   ( s ls) 2 ( s *ls) 2
D)   ( s ls) 2 ( p ls) 1
E)   none of theseF) C) and D)
G) None of the above

Question 13

The C - C sigma bond in HCCCl is most reasonably formed from overlap of:

Accepted Answer

A)   a sp2 orbital on HC carbon atom and a sp2 orbital on CCl carbon atom.
B)   a sp orbital on HC carbon atom with a sp orbital on CCl carbon atom.
C)   a sp2 orbital on HC carbon atom with a sp orbital on CCl carbon atom.
D)   a sp3 orbital on HC carbon atom with a sp3 orbital on CCl carbon atom.
E)   none of theseF) A) and D)
G) B) and E)

Question 14

Which of the following molecules would have a Lewis structure that most closely resembles O3, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

Accepted Answer

A)   H2S
B)   CO2
C)   OCl2
D)   SO2
E)   KrF2F) B) and E)
G) D) and E)

Question 15

The molecule H2CO contains:
(note, consider all the bonds of this molecule)

Accepted Answer

A)   2 s bonds and 2 p bonds
B)   1 s and 3 p bonds
C)   3 s and 2 p bonds
D)   2 s and 1 p bond
E)   3 s and 1 p bondF) A) and B)
G) A) and E)

Question 16

How many unpaired electrons are present in O2 - ?

Accepted Answer

A)   1
B)   2
C)   3
D)   0
E)   none of theseF) A) and C)
G) All of the above

Question 17

The bonded atom lone pair arrangement about the nitrogen atoms in HNNH is:

Accepted Answer

A)   trigonal planar.
B)   tetrahedral.
C)   trigonal bipyramidal.
D)   octahedral.
E)   none of theseF) None of the above
G) A) and C)

Question 18

What is the bonded atom lone pair arrangement with respect to the electrons around the central iodine atom in the species, IF41 - ?

Accepted Answer

A)   Tetrahedral
B)   Trigonal bipyramidal
C)   See-Saw
D)   Octahedral
E)   Square base pyramidF) A) and B)
G) None of the above

Question 19

Which of the following molecules would have a Lewis structure that most closely resembles SiO2, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

Accepted Answer

A)   H2O
B)   C S2
C)   SCl2
D)   SO2
E)   XeF2F) B) and D)
G) B) and C)

Question 20

What is the steric number with respect to the central iodine atom in the Lewis structure for the species, IF41 - ?

Accepted Answer

A)   2
B)   3
C)   4
D)   5
E)   6F) A) and C)
G) C) and E)

Exam 10: Molecular Structure and Bonding Theories

The molecule H2CO contains: (note, consider all the bonds of this molecule)

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The C - C sigma bond in HCCCl is most reasonably formed from overlap of:

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Three statements are given below. Pick the best answer. I. BCl3 is a trigonal planar molecule. II. SF6 is an octahedral molecule. III. PH3 is a trigonal planar molecule.

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Which of the following molecules is(are) polar? I. SO2 (angular) II. OF2 (angular) III. C S2 (linear)

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What is the steric number with respect to the central sulfur atom in the Lewis structure for sulfur dioxide, SO2?

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Pick the one statement listed below that is true .

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How many unpaired electrons are present in B2 - ?

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What is the bonded atom lone pair arrangement with respect to the electrons around the central iodine atom in the species, IF41 - ?

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How many unpaired electrons are present in O2 - ?

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What is the electron configuration of He2+?

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Which of the following molecules would have a Lewis structure that most closely resembles CCl4, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

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Which of the following molecules is(are) non-polar ? I. XeF4 (square planar) II. CHCl3 (tetrahedral) III. SF4 (see-saw)

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The bonded atom lone pair arrangement about the nitrogen atoms in HNNH is:

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Which of the following molecules would have a Lewis structure that most closely resembles O3, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

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Which molecule from the list below is considered polar ? The molecular shape is listed in parenthesis.

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What is the steric number with respect to the central iodine atom in the Lewis structure for the species, IF41 - ?

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What molecular shape is assumed by the four atoms in the nitrate anion, NO31 - ?

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What molecule listed below has a see-saw molecular shape?

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Which of the following molecules would have a Lewis structure that most closely resembles SiO2, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

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What is the electron configuration of NO - ?

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The molecule H₂CO contains: (note, consider all the bonds of this molecule)

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Three statements are given below. Pick the best answer. I. BCl₃ is a trigonal planar molecule. II. SF₆ is an octahedral molecule. III. PH₃ is a trigonal planar molecule.

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Which of the following molecules is(are) polar? I. SO₂ (angular) II. OF₂ (angular) III. C S₂ (linear)

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What is the steric number with respect to the central sulfur atom in the Lewis structure for sulfur dioxide, SO₂?

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How many unpaired electrons are present in B₂^-?

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What is the bonded atom lone pair arrangement with respect to the electrons around the central iodine atom in the species, IF₄^{1 -}?

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How many unpaired electrons are present in O₂^-?

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What is the electron configuration of He₂⁺?

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Which of the following molecules would have a Lewis structure that most closely resembles CCl₄, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

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Which of the following molecules is(are) non-polar ? I. XeF₄ (square planar) II. CHCl₃ (tetrahedral) III. SF₄ (see-saw)

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Which of the following molecules would have a Lewis structure that most closely resembles O₃, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

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What is the steric number with respect to the central iodine atom in the Lewis structure for the species, IF₄^{1 -}?

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What molecular shape is assumed by the four atoms in the nitrate anion, NO₃^{1 -}?

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Which of the following molecules would have a Lewis structure that most closely resembles SiO₂, as well as having an identical bonded atom lone pair arrangement and an identical molecular shape?

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What is the electron configuration of NO^-?

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