Question 1

The best Lewis structure for sulfuric acid has zero formal charges, sulfur as the central atom, and no bonds between S and H. How many single and double bonds, respectively, are there in this Lewis structure?

Accepted Answer

A)   2 single, 4 double
B)   4 single, 2 double
C)   4 single, no double
D)   6 single, no double
E)   5 single, 1 doubleF) B) and E)
G) C) and E)

Question 2

According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on A) will be trigonal planar.

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

In the following Lewis structure for phosphate, phosphorus has a formal charge of ____ and an oxidation number of ____.

Accepted Answer

A)   0; -3
B)   0; 5
C)   5; -3
D)   5; 5
E)   3; 5F) A) and E)
G) B) and D)

Question 5

In carbon disulfide, how many lone pairs of electrons are on each sulfur atom?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4F) A) and B)
G) A) and E)

Question 6

Predict the smallest actual bond angle in BrF3 using the VSEPR theory.

Accepted Answer

A)   more than 120°
B)   exactly 120°
C)   between 109° and 120°
D)   between 90° and 109°
E)   less than 90°F) All of the above
G) A) and D)

Question 7

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

Question 8

Select the correct Lewis structure for TeBr2.

Accepted Answer

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G) A) and C)

Question 9

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) A) and C)
G) B) and E)

Question 10

According to VSEPR theory, a molecule with the general formula AX2 will have a ___ molecular shape.

Accepted Answer

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

Question 11

The Lewis structure of NO2 violates the octet rule.

Accepted Answer

A) True 
 B)False

Question 12

In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

Accepted Answer

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

Question 13

How many resonance structures are possible for NO3-?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5F) A) and D)
G) A) and C)

Question 14

In which one of the following molecules are all the bonds single?

Accepted Answer

A)   O3
B)   POCl3
C)   CO
D)   COCl2
E)   N2H4F) A) and B)
G) C) and D)

Question 15

Predict the ideal bond angles in IF2- using the molecular shape given by the VSEPR theory.

Accepted Answer

A)   60°
B)   90°
C)   109°
D)   120°
E)   180°F) None of the above
G) C) and E)

Question 16

What is the molecular shape of ClCN 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 are correct.F) All of the above
G) None of the above

Question 17

In the following Lewis structure for ClO3F, chlorine has a formal charge of ____ and an oxidation number of ____. 3F, chlorine has a formal charge of ____ and an oxidation number of ____.   A)  7; 7 B)  7; -1 C)  1; 1 D)  1; -1 E)  1; 7" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   7; 7
B)   7; -1
C)   1; 1
D)   1; -1
E)   1; 7F) A) and E)
G) A) and C)

Question 18

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) D) and E)
G) A) and C)

Exam 10: The Shapes of Molecules

What is the molecular shape of ClCN 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 AX₂ will have a ___ molecular shape.

Correct Answer
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Select the correct Lewis structure for TeBr₂.

Correct Answer
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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?

Correct Answer
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The best Lewis structure for sulfuric acid has zero formal charges, sulfur as the central atom, and no bonds between S and H. How many single and double bonds, respectively, are there in this Lewis structure?

Correct Answer
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How many resonance structures are possible for NO₃^-?

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

Correct Answer
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In the following Lewis structure for ClO₃F, chlorine has a formal charge of and an oxidation number of .

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

Correct Answer
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In the following Lewis structure for phosphate, phosphorus has a formal charge of and an oxidation number of .

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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In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

Correct Answer
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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 Answer
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In carbon disulfide, how many lone pairs of electrons are on each sulfur atom?

Correct Answer
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In which one of the following molecules are all the bonds single?

Correct Answer
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Predict the smallest actual bond angle in BrF₃ using the VSEPR theory.

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₃E₂ (where E represents a lone pair on A) will be trigonal planar.

Correct Answer
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Predict the ideal bond angles in IF₂^- using the molecular shape given by the VSEPR theory.

Correct Answer
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Exam 10: The Shapes of Molecules

What is the molecular shape of ClCN as predicted by the VSEPR theory? (Carbon is the central atom.)

Correct AnswerverifiedShow Answer

According to VSEPR theory, a molecule with the general formula AX2 will have a ___ molecular shape.

Correct AnswerverifiedShow Answer

Select the correct Lewis structure for TeBr2.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The best Lewis structure for sulfuric acid has zero formal charges, sulfur as the central atom, and no bonds between S and H. How many single and double bonds, respectively, are there in this Lewis structure?

Correct AnswerverifiedShow Answer

How many resonance structures are possible for NO3-?

Correct AnswerverifiedShow Answer

The Lewis structure of NO2 violates the octet rule.

Correct AnswerverifiedShow Answer

In the following Lewis structure for ClO3F, chlorine has a formal charge of ____ and an oxidation number of ____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In the following Lewis structure for phosphate, phosphorus has a formal charge of ____ and an oxidation number of ____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In neutral molecules, how many bonds are commonly formed by nitrogen? And how many by oxygen?

Correct AnswerverifiedShow Answer

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

In carbon disulfide, how many lone pairs of electrons are on each sulfur atom?

Correct AnswerverifiedShow Answer

In which one of the following molecules are all the bonds single?

Correct AnswerverifiedShow Answer

Predict the smallest actual bond angle in BrF3 using the VSEPR theory.

Correct AnswerverifiedShow Answer

According to VSEPR theory, a molecule with the general formula AX3E2 (where E represents a lone pair on A) will be trigonal planar.

Correct AnswerverifiedShow Answer

Predict the ideal bond angles in IF2- using the molecular shape given by the VSEPR theory.

Correct AnswerverifiedShow Answer

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₂ will have a ___ molecular shape.

Correct Answer
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Select the correct Lewis structure for TeBr₂.

Correct Answer
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Correct Answer
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Correct Answer
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How many resonance structures are possible for NO₃^-?

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

Correct Answer
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In the following Lewis structure for ClO₃F, chlorine has a formal charge of and an oxidation number of .

Correct Answer
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Correct Answer
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In the following Lewis structure for phosphate, phosphorus has a formal charge of and an oxidation number of .

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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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Predict the smallest actual bond angle in BrF₃ using the VSEPR theory.

Correct Answer
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According to VSEPR theory, a molecule with the general formula AX₃E₂ (where E represents a lone pair on A) will be trigonal planar.

Correct Answer
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Predict the ideal bond angles in IF₂^- using the molecular shape given by the VSEPR theory.

Correct Answer
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