Question 1

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

Accepted Answer

A)   more than 120  °\degree° 
B)   exactly 120  °\degree° 
C)   between 109  °\degree°  and 120  °\degree° 
D)   between 90  °\degree°  and 109  °\degree° 
E)   less than 90  °\degree°F) B) and E)
G) B) and D)

Question 2

Predict the actual bond angle in SeCl2 using the VSEPR theory.

Accepted Answer

A)   more than 120  °\degree° 
B)   between 109  °\degree°  and 120  °\degree° 
C)   between 90  °\degree° and 109  °\degree° 
D)   exactly 90  °\degree° 
E)   less than 90  °\degree°F) B) and E)
G) D) and E)

Question 3

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

Accepted Answer

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

Question 4

Which one of the following molecules contains a double bond?

Accepted Answer

A)   N2
B)   PCl5
C)   CH2O
D)   C2H2
E)   I2F) B) and E)
G) A) and D)

Question 5

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) B) and D)
G) B) and E)

Question 6

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 these choices is correct." 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 these choices is correct.F) C) and E)
G) All of the above

Question 7

Using SO2 as an example, describe the sort of experimental data which might suggest that no single Lewis structure is an accurate representation of its bonding.

Accepted Answer

In the SO₂ molecule, the two sulfur-oxyge...

Question 8

Use VSEPR theory to decide which one of the following ions and molecules is likely to be planar. (The central atom is always first in the formula.)

Accepted Answer

A)   BrF3
B)   H3O+
C)   PCl3
D)   SO42¯
E)   SF4F) B) and E)
G) All of the above

Question 9

Predict the actual bond angles in SF3+ using the VSEPR theory.

Accepted Answer

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

Question 10

Select the Lewis structure for XeO2F2 which correctly minimizes formal charges.

Accepted Answer

A)   2F2 which correctly minimizes formal charges. 
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B)   2F2 which correctly minimizes formal charges. 
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C)   2F2 which correctly minimizes formal charges. 
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D)   2F2 which correctly minimizes formal charges. 
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E)   2F2 which correctly minimizes formal charges. 
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G) A) and E)

Question 11

What is the molecular shape of NH2Cl as predicted by the VSEPR theory?

Accepted Answer

A)   trigonal pyramidal
B)   tetrahedral
C)   T-shaped
D)   see-saw
E)   trigonal planarF) B) and D)
G) D) and E)

Question 12

Bond angles of 180 $\degree$ only occur around atoms which display linear molecular geometry.

Accepted Answer

A) True 
 B)False

Question 13

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) A) and B)

Question 14

Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF2¯.

Accepted Answer

A)   octahedral
B)   trigonal bipyramidal
C)   tetrahedral
D)   trigonal planar
E)   bentF) A) and E)
G) A) and C)

Question 15

Select the best Lewis structure for P2I4.

Accepted Answer

A)   2I4. 
A)     
B)     
C)     
D)     
E)   None of these structures is suitable for P2I4." class="answers-bank-image d-inline" rel="preload" >
B)   2I4. 
A)     
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D)     
E)   None of these structures is suitable for P2I4." class="answers-bank-image d-inline" rel="preload" >
C)   2I4. 
A)     
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D)     
E)   None of these structures is suitable for P2I4." class="answers-bank-image d-inline" rel="preload" >
D)   2I4. 
A)     
B)     
C)     
D)     
E)   None of these structures is suitable for P2I4." class="answers-bank-image d-inline" rel="preload" >
E)   None of these structures is suitable for P2I4.F) A) and B)
G) A) and C)

Question 16

Which of the following has no net dipole moment?

Accepted Answer

A)   N2O
B)   NF3
C)   H2Se
D)   TeO3
E)   CH3ClF) A) and D)
G) A) and C)

Question 17

What is the molecular symmetry around the carbons in CCl2CH2 as predicted by the VSEPR theory?

Accepted Answer

A)   linear
B)   trigonal planar
C)   V-shaped
D)   tetrahedral
E)   trigonal pyramidalF) A) and E)
G) All of the above

Question 18

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 C)
G) None of the above

Question 19

Select the correct Lewis structure for nitrogen trifluoride, NF3.

Accepted Answer

A)   3. 
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B)   3. 
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C)   3. 
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D)   3. 
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E)   3. 
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G) A) and D)

Question 20

The molecule AX2, where A and X are different elements, will have a dipole moment if the molecule is bent.

Accepted Answer

A) True 
 B)False

Exam 10: The Shapes of Molecules

Which of the following has no net dipole moment?

Correct AnswerverifiedShow Answer

What is the molecular shape of NH2Cl as predicted by the VSEPR theory?

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The molecule AX2, where A and X are different elements, will have a dipole moment if the molecule is bent.

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Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF2¯.

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

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Which one of the following molecules contains a double bond?

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

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Select the Lewis structure for XeO2F2 which correctly minimizes formal charges.

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Select the best Lewis structure for P2I4.

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

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Select the correct Lewis structure for nitrogen trifluoride, NF3.

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What is the molecular symmetry around the carbons in CCl2CH2 as predicted by the VSEPR theory?

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

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Predict the actual bond angle in SeCl2 using the VSEPR theory.

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

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

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Use VSEPR theory to decide which one of the following ions and molecules is likely to be planar. (The central atom is always first in the formula.)

Correct AnswerverifiedShow Answer

Using SO2 as an example, describe the sort of experimental data which might suggest that no single Lewis structure is an accurate representation of its bonding.

Correct AnswerverifiedIn the SO2 molecule, the two sulfur-oxyge...View AnswerShow Answer

Predict the actual bond angles in SF3+ using the VSEPR theory.

Correct AnswerverifiedShow Answer

Correct Answer
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What is the molecular shape of NH₂Cl as predicted by the VSEPR theory?

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The molecule AX₂, where A and X are different elements, will have a dipole moment if the molecule is bent.

Correct Answer
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Use VSEPR theory to predict the electron group arrangement around iodine, the central atom in the ion IF₂^¯.

Correct Answer
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Bond angles of 180 $\degree$ only occur around atoms which display linear molecular geometry.

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Select the Lewis structure for XeO₂F₂ which correctly minimizes formal charges.

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Select the best Lewis structure for P₂I₄.

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Correct Answer
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Select the correct Lewis structure for nitrogen trifluoride, NF₃.

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What is the molecular symmetry around the carbons in CCl₂CH₂ as predicted by the VSEPR theory?

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

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Predict the actual bond angle in SeCl₂ using the VSEPR theory.

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

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Using SO₂ as an example, describe the sort of experimental data which might suggest that no single Lewis structure is an accurate representation of its bonding.

Correct Answer
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In the SO₂ molecule, the two sulfur-oxyge...
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Predict the actual bond angles in SF₃⁺ using the VSEPR theory.

Correct Answer
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