Question 1

What is the molecular shape of XeO2F2 as predicted by the VSEPR theory? 2F2 as predicted by the VSEPR theory?   A)  square planar B)  tetrahedral C)  square pyramidal D)  see-saw E)  octahedral" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   square planar
B)   tetrahedral
C)   square pyramidal
D)   see-saw
E)   octahedralF) B) and D)
G) B) and C)

Question 2

According to VSEPR theory, a molecule with the general formula AX4E will have a _____ molecular shape.

Accepted Answer

A)   bent
B)   see-saw
C)   trigonal planar
D)   T-shaped
E)   square planarF) A) and B)
G) All of the above

Question 3

What is the molecular shape of N2O as predicted by the VSEPR theory? 2O as predicted by the VSEPR theory?   A)  trigonal pyramidal B)  trigonal planar C)  angular D)  bent E)  linear" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   trigonal pyramidal
B)   trigonal planar
C)   angular
D)   bent
E)   linearF) B) and D)
G) A) and B) E

Question 4

The formal charge on Cl in the structure shown for the perchlorate ion is:

Accepted Answer

A)   -2
B)   -1
C)   0
D)   +1
E)   +2F) B) and D)
G) None of the above

Question 5

In formaldehyde, CH2O, both the formal charge and the oxidation number of carbon are zero.

Accepted Answer

A) True 
 B)False

Question 6

A) Draw and name three molecular shapes for molecules having the VSEPR formulas AX3, AX3E and AX3E2, respectively.
B) If the three X groups in the above formulas are identical, which of the three shapes would result in a molecule with a dipole moment?

Accepted Answer

a. The three structures and their molecular shapes are shown below.  b. The trigonal pyramidal and T-shaped molecules will have dipole moments.

Question 7

What is the molecular shape of the thiocyanate anion, SCN¯, as predicted by the VSEPR theory? (Carbon is the central atom.)

Accepted Answer

A)   linear
B)   bent
C)   angular
D)   trigonal
E)   None of these choices is correct.F) C) and D)
G) A) and B)

Question 8

Predict the ideal bond angles around nitrogen in N2F2 using the molecular shape given by the VSEPR theory. (The two N atoms are the central atoms.)

Accepted Answer

A)   90  °\degree° 
B)   109  °\degree° 
C)   120  °\degree° 
D)   180  °\degree° 
E)   between 120 and 180  °\degree°F) C) and D)
G) A) and B)

Question 9

What is the molecular shape of NOCl as predicted by the VSEPR theory?

Accepted Answer

A)   linear
B)   trigonal planar
C)   bent
D)   tetrahedral
E)   trigonal pyramidalF) A) and D)
G) D) and E)

Question 10

When resonance occurs, the bond lengths in a molecule fluctuate rapidly.

Accepted Answer

A) True 
 B)False  False

Question 11

In the nitrate ion (NO3¯) , nitrogen and oxygen are held together by

Accepted Answer

A)   ionic interactions.
B)   covalent bonds.
C)   dative bonds.
D)   electronegativity.
E)   network bonds.F) None of the above
G) C) and D)

Question 12

According to VSEPR theory, a molecule with the general formula AX3E2 will have a _____ molecular shape.

Accepted Answer

A)   trigonal pyramidal
B)   trigonal bipyramidal
C)   trigonal planar
D)   T-shaped
E)   see-sawF) B) and D)
G) C) and E)

Question 13

In which of the following does the nitrogen atom have a formal charge of -1?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and B)
G) None of the above

Question 14

According to VSEPR theory, a molecule with the general formula AX5E will have a ______ molecular shape.

Accepted Answer

A)   tetrahedral
B)   trigonal bipyramidal
C)   square pyramidal
D)   octahedral
E)   see-sawF) A) and E)
G) A) and D)

Question 15

What is the shape of the PF3 molecule? Explain your answer, using VSEPR theory.

Accepted Answer

The Lewis structure has a lone pair on t...

Question 16

In which one of the following is the best Lewis structure a resonance structure?

Accepted Answer

A)   CO2 (C = central atom) 
B)   ClO3¯ (Cl = central atom) 
C)   COCl2 (C = central atom) 
D)   NO2+ (N = central atom) 
E)   HCN (C = central atom) F) B) and D)
G) None of the above

Question 17

Which one of the following Lewis structures is definitely incorrect?

Accepted Answer

A)   NO 2¯   
D)   SO32¯   
E)   PCl5  " class="answers-bank-image d-inline" rel="preload" >
B)   HCN 2¯   
D)   SO32¯   
E)   PCl5  " class="answers-bank-image d-inline" rel="preload" >
C)   NO2¯ 2¯   
D)   SO32¯   
E)   PCl5  " class="answers-bank-image d-inline" rel="preload" >
D)   SO32¯ 2¯   
D)   SO32¯   
E)   PCl5  " class="answers-bank-image d-inline" rel="preload" >
E)   PCl5 2¯   
D)   SO32¯   
E)   PCl5  " class="answers-bank-image d-inline" rel="preload" >F) A) and D)
G) None of the above

Question 18

In the COCl2 molecule, carbon is the central atom. Based on the best Lewis structure for COCl2, what is the formal charge on carbon?

Accepted Answer

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

Question 19

The Lewis structure of NO2 violates the octet rule.

Accepted Answer

A) True 
 B)False

Question 20

What is the molecular shape of NO2¯ as predicted by the VSEPR theory?

Accepted Answer

A)   linear
B)   trigonal planar
C)   bent
D)   tetrahedral
E)   resonantF) None of the above
G) A) and B)

Exam 10: The Shapes of Molecules

What is the molecular shape of XeO2F2 as predicted by the VSEPR theory?

Correct AnswerverifiedShow Answer

According to VSEPR theory, a molecule with the general formula AX4E will have a _____ molecular shape.

Correct AnswerverifiedShow Answer

What is the molecular shape of N2O as predicted by the VSEPR theory?

Correct AnswerverifiedE

The formal charge on Cl in the structure shown for the perchlorate ion is:

Correct AnswerverifiedShow Answer

In formaldehyde, CH2O, both the formal charge and the oxidation number of carbon are zero.

Correct AnswerverifiedShow Answer

A) Draw and name three molecular shapes for molecules having the VSEPR formulas AX3, AX3E and AX3E2, respectively. B) If the three X groups in the above formulas are identical, which of the three shapes would result in a molecule with a dipole moment?

Correct Answerverifieda. The three structures and their molecular shapes are shown below. 11eb16b3_000b_7536_984d_270eb4710285_TB7799_00 b. The trigonal pyramidal and T-shaped molecules will have dipole moments.

What is the molecular shape of the thiocyanate anion, SCN¯, as predicted by the VSEPR theory? (Carbon is the central atom.)

Correct AnswerverifiedShow Answer

Predict the ideal bond angles around nitrogen in N2F2 using the molecular shape given by the VSEPR theory. (The two N atoms are the central atoms.)

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What is the molecular shape of NOCl as predicted by the VSEPR theory?

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When resonance occurs, the bond lengths in a molecule fluctuate rapidly.

Correct AnswerverifiedFalse

In the nitrate ion (NO3¯) , nitrogen and oxygen are held together by

Correct AnswerverifiedShow Answer

According to VSEPR theory, a molecule with the general formula AX3E2 will have a _____ molecular shape.

Correct AnswerverifiedShow Answer

In which of the following does the nitrogen atom have a formal charge of -1?

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According to VSEPR theory, a molecule with the general formula AX5E will have a ______ molecular shape.

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What is the shape of the PF3 molecule? Explain your answer, using VSEPR theory.

Correct AnswerverifiedThe Lewis structure has a lone pair on t...View AnswerShow Answer

In which one of the following is the best Lewis structure a resonance structure?

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Which one of the following Lewis structures is definitely incorrect?

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In the COCl2 molecule, carbon is the central atom. Based on the best Lewis structure for COCl2, what is the formal charge on carbon?

Correct AnswerverifiedShow Answer

The Lewis structure of NO2 violates the octet rule.

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What is the molecular shape of NO2¯ as predicted by the VSEPR theory?

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What is the molecular shape of XeO₂F₂ as predicted by the VSEPR theory?

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₄E will have a _____ molecular shape.

Correct Answer
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What is the molecular shape of N₂O as predicted by the VSEPR theory?

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E

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In formaldehyde, CH₂O, both the formal charge and the oxidation number of carbon are zero.

Correct Answer
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A) Draw and name three molecular shapes for molecules having the VSEPR formulas AX₃, AX₃E and AX₃E₂, respectively. B) If the three X groups in the above formulas are identical, which of the three shapes would result in a molecule with a dipole moment?

Correct Answer
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a. The three structures and their molecular shapes are shown below. 11eb16b3_000b_7536_984d_270eb4710285_TB7799_00 b. The trigonal pyramidal and T-shaped molecules will have dipole moments.

What is the molecular shape of the thiocyanate anion, SCN^¯, as predicted by the VSEPR theory? (Carbon is the central atom.)

Correct Answer
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Predict the ideal bond angles around nitrogen in N₂F₂ using the molecular shape given by the VSEPR theory. (The two N atoms are the central atoms.)

Correct Answer
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False

In the nitrate ion (NO₃^¯) , nitrogen and oxygen are held together by

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₃E₂ will have a _____ molecular shape.

Correct Answer
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Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₅E will have a ______ molecular shape.

Correct Answer
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What is the shape of the PF₃ molecule? Explain your answer, using VSEPR theory.

Correct Answer
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The Lewis structure has a lone pair on t...
View Answer

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In the COCl₂ molecule, carbon is the central atom. Based on the best Lewis structure for COCl₂, what is the formal charge on carbon?

Correct Answer
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The Lewis structure of NO₂ violates the octet rule.

Correct Answer
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What is the molecular shape of NO₂^¯ as predicted by the VSEPR theory?

Correct Answer
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