Question 1

Which of the following bonds would be the most polar?

Accepted Answer

A)   N--C
B)   N--Si
C)   N--P
D)   N--Al
E)   N--GaF) B) and D)
G) B) and E)

Question 2

Which of the following molecules or ions will have a Lewis structure most like that of phosphorus trichloride,PCl3?

Accepted Answer

A)   ClO3-
B)   SO3
C)   CO32-
D)   BF3
E)   Cl2COF) A) and B)
G) A) and E)

Question 3

Which of the following is the Lewis electron dot structure for carbon monoxide?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) B) and C)
G) A) and E)

Question 4

What is the formal charge of the oxygen atom in the Lewis structure for cyanate shown below?

Accepted Answer

A)   0
B)   −2
C)   +1
D)   −1
E)   2F) A) and E)
G) B) and D)

Question 5

Which of the following molecules or ions are isoelectronic: SO3,NF3,NO3-,CO32-?

Accepted Answer

A)   SO3 and NF3
B)   NF3 and CO32-
C)   SO3,NF3 and CO32-
D)   SO3,NO3- and CO32-
E)   SO3,NF3,NO3-,and CO32-F) B) and C)
G) A) and C)

Question 6

Which of the following is the correct Lewis dash formula for carbon diselenide?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and D)
G) A) and C)

Question 7

Which is the best Lewis structure of CH2FCO2H (connectivity correct as given) ?

Accepted Answer

A)   2FCO2H (connectivity correct as given) ? 
A)     
B)     
C)     
D)     
E)   none of these is acceptable" class="answers-bank-image d-inline" rel="preload" >
B)   2FCO2H (connectivity correct as given) ? 
A)     
B)     
C)     
D)     
E)   none of these is acceptable" class="answers-bank-image d-inline" rel="preload" >
C)   2FCO2H (connectivity correct as given) ? 
A)     
B)     
C)     
D)     
E)   none of these is acceptable" class="answers-bank-image d-inline" rel="preload" >
D)   2FCO2H (connectivity correct as given) ? 
A)     
B)     
C)     
D)     
E)   none of these is acceptable" class="answers-bank-image d-inline" rel="preload" >
E)   none of these is acceptableF) C) and D)
G) A) and E)

Question 8

Choose which central atom in the following molecules is most electronegative.

Accepted Answer

A)   PH3
B)   CH4
C)   H2S
D)   H2O
E)   NH3F) All of the above
G) C) and E)

Question 9

Which of the following groups of molecules contains no ionic compounds?

Accepted Answer

A)   HCN,NO2,and Ca(NO3) 2
B)   PCl5,LiBr,and Zn(OH) 2
C)   KOH,CCl4,and SF4
D)   NaH,CaF2,and NaNH2
E)   CH2O,H2S,and NH3F) A) and B)
G) A) and C)

Question 10

Which of the following molecules is nonpolar?

Accepted Answer

A)   sulfur dioxide,SO2
B)   hydrogen fluoride,HF
C)   phosphorus trifluoride,PF3
D)   boron trifluoride,BF3
E)   iodine trichloride,ICl3F) All of the above
G) A) and C)

Question 11

In molecules,as bond order increases,

Accepted Answer

A)   both bond length and bond energy increase.
B)   both bond length and bond energy decrease.
C)   bond length increases and bond energy is unchanged.
D)   bond length is unchanged and bond energy increases.
E)   bond length decreases and bond energy increases.F) A) and C)
G) C) and D)

Question 12

According to VSEPR theory,which of the following is the correct molecular geometry around the carbon atom in formaldehyde?

Accepted Answer

A)   Linear
B)   Bent
C)   Trigonal-planar
D)   Tetrahedral
E)   OctahedralF) C) and D)
G) A) and B) C

Question 13

Based on electron-pair geometries,which of the following molecules has the smallest bond angle between any two adjacent atoms?

Accepted Answer

A)   CH4
B)   H2O
C)   BH3
D)   PH3
E)   SF6F) A) and D)
G) A) and E)

Question 14

When both of the electrons in a molecular bond originate from the same atom,the bond is called a(n)

Accepted Answer

A)   sigma bond.
B)   coordinate covalent bond.
C)   pi bond.
D)   metallic bond.
E)   ionic bond.F) C) and E)
G) A) and C) B

Question 15

The central atom in SF6 is surrounded by

Accepted Answer

A)   six single bonds and no lone pairs of electrons.
B)   six single bonds and one lone pair of electrons.
C)   six single bonds and two lone pairs of electrons.
D)   five single bonds,one double bond,and one lone pair of electrons.
E)   four single bonds,two double bonds,and no lone pairs of electrons.F) None of the above
G) C) and D)

Question 16

Which of the following elements is able to form a molecular structure that exceeds the octet rule?

Accepted Answer

A)   C
B)   N
C)   O
D)   F
E)   ClF) A) and D)
G) C) and D)

Question 17

What are the approximate H−N−H bond angles in NH4+?

Accepted Answer

A)   109.5°
B)   120°
C)   109.5° and 120°
D)   90°
E)   90° and 120°F) A) and B)
G) A) and C)

Question 18

The correct Lewis structure for Cl2CO is (the 2 Cl's and the O are bound to the C and not to each other) :

Accepted Answer

A)   2CO is (the 2 Cl's and the O are bound to the C and not to each other) : 
A)     
B)     
C)     
D)     
E)   none of these" class="answers-bank-image d-inline" rel="preload" >
B)   2CO is (the 2 Cl's and the O are bound to the C and not to each other) : 
A)     
B)     
C)     
D)     
E)   none of these" class="answers-bank-image d-inline" rel="preload" >
C)   2CO is (the 2 Cl's and the O are bound to the C and not to each other) : 
A)     
B)     
C)     
D)     
E)   none of these" class="answers-bank-image d-inline" rel="preload" >
D)   2CO is (the 2 Cl's and the O are bound to the C and not to each other) : 
A)     
B)     
C)     
D)     
E)   none of these" class="answers-bank-image d-inline" rel="preload" >
E)   none of theseF) C) and D)
G) A) and B)

Question 19

Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of nitrogen trichloride,NCl3.

Accepted Answer

A)   The electron-pair geometry is linear,the molecular geometry is linear.
B)   The electron-pair geometry is trigonal-planar,the molecular geometry is trigonal-planar.
C)   The electron-pair geometry is trigonal-planar,the molecular geometry is bent.
D)   The electron-pair geometry is tetrahedral,the molecular geometry is tetrahedral.
E)   The electron-pair geometry is tetrahedral,the molecular geometry is trigonal-pyramidal.F) A) and B)
G) A) and E) E

Question 20

What is the bond angle in a trigonal planar molecule or ion?

Accepted Answer

A)   109°
B)   180°
C)   90°
D)   72°
E)   120°F) A) and B)
G) B) and E)

Exam 9: Bonding and Molecular Structure

Which of the following bonds would be the most polar?

Correct AnswerverifiedShow Answer

Which of the following molecules or ions will have a Lewis structure most like that of phosphorus trichloride,PCl3?

Correct AnswerverifiedShow Answer

Which of the following is the Lewis electron dot structure for carbon monoxide?

Correct AnswerverifiedShow Answer

What is the formal charge of the oxygen atom in the Lewis structure for cyanate shown below?

Correct AnswerverifiedShow Answer

Which of the following molecules or ions are isoelectronic: SO3,NF3,NO3-,CO32-?

Correct AnswerverifiedShow Answer

Which of the following is the correct Lewis dash formula for carbon diselenide?

Correct AnswerverifiedShow Answer

Which is the best Lewis structure of CH2FCO2H (connectivity correct as given) ?

Correct AnswerverifiedShow Answer

Choose which central atom in the following molecules is most electronegative.

Correct AnswerverifiedShow Answer

Which of the following groups of molecules contains no ionic compounds?

Correct AnswerverifiedShow Answer

Which of the following molecules is nonpolar?

Correct AnswerverifiedShow Answer

In molecules,as bond order increases,

Correct AnswerverifiedShow Answer

According to VSEPR theory,which of the following is the correct molecular geometry around the carbon atom in formaldehyde?

Correct AnswerverifiedC

Based on electron-pair geometries,which of the following molecules has the smallest bond angle between any two adjacent atoms?

Correct AnswerverifiedShow Answer

When both of the electrons in a molecular bond originate from the same atom,the bond is called a(n)

Correct AnswerverifiedB

The central atom in SF6 is surrounded by

Correct AnswerverifiedShow Answer

Which of the following elements is able to form a molecular structure that exceeds the octet rule?

Correct AnswerverifiedShow Answer

What are the approximate H−N−H bond angles in NH4+?

Correct AnswerverifiedShow Answer

The correct Lewis structure for Cl2CO is (the 2 Cl's and the O are bound to the C and not to each other) :

Correct AnswerverifiedShow Answer

Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of nitrogen trichloride,NCl3.

Correct AnswerverifiedE

What is the bond angle in a trigonal planar molecule or ion?

Correct AnswerverifiedShow Answer

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Which of the following molecules or ions will have a Lewis structure most like that of phosphorus trichloride,PCl₃?

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Which of the following molecules or ions are isoelectronic: SO₃,NF₃,NO₃^-,CO₃^2-?

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Which is the best Lewis structure of CH₂FCO₂H (connectivity correct as given) ?

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C

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B

The central atom in SF₆ is surrounded by

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What are the approximate H−N−H bond angles in NH₄⁺?

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The correct Lewis structure for Cl₂CO is (the 2 Cl's and the O are bound to the C and not to each other) :

Correct Answer
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Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of nitrogen trichloride,NCl₃.

Correct Answer
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E

Correct Answer
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