Question 1

In order for a non-cyclic triatomic molecule to be bent, VSEPR theory requires that there must be two lone pairs on the central atom.

Accepted Answer

A) True 
 B)False

Question 2

What is the molecular shape of BeH2 as predicted by the VSEPR theory?

Accepted Answer

A)   linear
B)   bent
C)   angular
D)   trigonal
E)   none of the aboveF) C) and D)
G) B) and D)

Question 3

The formal charges on Cl and O in the structure shown for the ClO- ion are, respectively - ion are, respectively   A)  0 and -1 B)  -1 and 0 C)  1 and -2 D)  -2 and 1 E)  none of the above" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 4

Use VSEPR theory to decide which one of the following molecules and ions will definitely have at least one 90° bond angle in it. (In each case except water, the central atom is the first one in the formula.)

Accepted Answer

A)   AlCl4-
B)   NH3
C)   PCl5
D)   CO2
E)   H2OF) B) and C)
G) None of the above

Question 5

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) None of the above
G) A) and E)

Question 6

According to VSEPR theory, a molecule with the general formula AX2E2 will have a _____ molecular shape.

Accepted Answer

A)   linear
B)   bent
C)   trigonal planar
D)   tetrahedral
E)   see-sawF) C) and D)
G) All of the above

Question 7

Select the best Lewis structure for ClCN.

Accepted Answer

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

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

Bond angles of 180° only occur around atoms which display linear molecular geometry.

Accepted Answer

A) True 
 B)False

Question 10

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) A) and D)
G) None of the above

Question 11

Which one of the following Lewis structures is definitely incorrect?

Accepted Answer

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

Question 12

In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold)

Accepted Answer

A)   CO2
B)   ClO3-
C)   COCl2
D)   NO2+
E)   HCNF) A) and D)
G) A) and E)

Question 13

Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry. Select the best Lewis structure for SOCl2.

Accepted Answer

A)   2. 
A)     
B)     
C)     
D)     
E)   None of the above structures is suitable for SOCl2." class="answers-bank-image d-inline" rel="preload" >
B)   2. 
A)     
B)     
C)     
D)     
E)   None of the above structures is suitable for SOCl2." class="answers-bank-image d-inline" rel="preload" >
C)   2. 
A)     
B)     
C)     
D)     
E)   None of the above structures is suitable for SOCl2." class="answers-bank-image d-inline" rel="preload" >
D)   2. 
A)     
B)     
C)     
D)     
E)   None of the above structures is suitable for SOCl2." class="answers-bank-image d-inline" rel="preload" >
E)   None of the above structures is suitable for SOCl2.F) A) and D)
G) All of the above

Question 14

In which one of the following structures does the central atom have a formal charge of +2?

Accepted Answer

A)   SF6 6   
B)   SO42-   
C)   O3   
D)   BeCl2   
E)   AlCl4-  " class="answers-bank-image d-inline" rel="preload" >
B)   SO42- 6   
B)   SO42-   
C)   O3   
D)   BeCl2   
E)   AlCl4-  " class="answers-bank-image d-inline" rel="preload" >
C)   O3 6   
B)   SO42-   
C)   O3   
D)   BeCl2   
E)   AlCl4-  " class="answers-bank-image d-inline" rel="preload" >
D)   BeCl2 6   
B)   SO42-   
C)   O3   
D)   BeCl2   
E)   AlCl4-  " class="answers-bank-image d-inline" rel="preload" >
E)   AlCl4- 6   
B)   SO42-   
C)   O3   
D)   BeCl2   
E)   AlCl4-  " class="answers-bank-image d-inline" rel="preload" >F) B) and E)
G) All of the above

Question 15

In which one of the following species is the central atom (the first atom in the formula)  an exception to the octet rule?

Accepted Answer

A)   NH3
B)   NH4+
C)   I2
D)   BH4-
E)   SF6F) C) and E)
G) B) and E)

Question 16

According to VSEPR theory, a molecule with the general formula AX5 will have a ______ molecular shape.

Accepted Answer

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

Question 17

List the three important ways in which molecules can violate the octet rule, and in each case draw one Lewis structure of your choice as an example.

Accepted Answer

Electron-deficient molecules have fewer ...

Question 18

Draw Lewis structures, showing all valence electrons, for:
a. N
b. Br-
c. O2
d. SO42-

Accepted Answer

A)11ec6d40_88db_23e6_9cd1_6949936dcf2d_T...

Question 19

Predict the ideal bond angles around carbon in C2I2 using the molecular shape given by the VSEPR theory.

Accepted Answer

A)   90°
B)   109°
C)   120°
D)   180°
E)   none of the aboveF) B) and E)
G) A) and E)

Question 20

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 the aboveF) C) and D)
G) B) and D)

Exam 10: The Shapes of Molecules

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

Correct AnswerverifiedShow Answer

According to VSEPR theory, a molecule with the general formula AX2E2 will have a _____ molecular shape.

Correct AnswerverifiedShow Answer

Predict the ideal bond angles around carbon in C2I2 using the molecular shape given by the VSEPR theory.

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

Correct AnswerverifiedShow Answer

What is the molecular shape of BeH2 as predicted by the VSEPR theory?

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Which one of the following Lewis structures is definitely incorrect?

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

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Select the best Lewis structure for ClCN.

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List the three important ways in which molecules can violate the octet rule, and in each case draw one Lewis structure of your choice as an example.

Correct AnswerverifiedElectron-deficient molecules have fewer ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Bond angles of 180° only occur around atoms which display linear molecular geometry.

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In which one of the following is the best Lewis structure a resonance structure? (central atoms are bold)

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In which one of the following species is the central atom (the first atom in the formula) an exception to the octet rule?

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According to VSEPR theory, a molecule with the general formula AX5 will have a ______ molecular shape.

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In which one of the following structures does the central atom have a formal charge of +2?

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Use VSEPR theory to decide which one of the following molecules and ions will definitely have at least one 90° bond angle in it. (In each case except water, the central atom is the first one in the formula.)

Correct AnswerverifiedShow Answer

The formal charges on Cl and O in the structure shown for the ClO- ion are, respectively

Correct AnswerverifiedShow Answer

Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry. Select the best Lewis structure for SOCl2.

Correct AnswerverifiedShow Answer

In order for a non-cyclic triatomic molecule to be bent, VSEPR theory requires that there must be two lone pairs on the central atom.

Correct AnswerverifiedShow Answer

Draw Lewis structures, showing all valence electrons, for: a. N b. Br- c. O2 d. SO42-

Correct AnswerverifiedA)11ec6d40_88db_23e6_9cd1_6949936dcf2d_T...View AnswerShow Answer

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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According to VSEPR theory, a molecule with the general formula AX₂E₂will have a _____ molecular shape.

Correct Answer
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Predict the ideal bond angles around carbon in C₂I₂using the molecular shape given by the VSEPR theory.

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₃E₂will have a _____ molecular shape.

Correct Answer
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What is the molecular shape of BeH₂as predicted by the VSEPR theory?

Correct Answer
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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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Electron-deficient molecules have fewer ...
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According to VSEPR theory, a molecule with the general formula AX₅ will have a ______ molecular shape.

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The formal charges on Cl and O in the structure shown for the ClO^-ion are, respectively

Correct Answer
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Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry. Select the best Lewis structure for SOCl₂.

Correct Answer
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Correct Answer
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Draw Lewis structures, showing all valence electrons, for: a. N b. Br^- c. O₂ d. SO₄^2-

Correct Answer
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