Question 1

What is the molecular shape of SCl3F as predicted by the VSEPR theory?

Accepted Answer

A)   linear
B)   bent
C)   see-saw
D)   T-shaped
E)   trigonal pyramidalF) B) and E)
G) C) and D)

Question 2

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) A) and C)
G) B) and D)

Question 3

Use VSEPR theory to decide which one of the following molecules and ions will have a trigonal pyramidal geometry. (The central atom is always first in the formula.)

Accepted Answer

A)   PCl3
B)   BF3
C)   SO3
D)   BrF3
E)   CO32-F) B) and E)
G) C) and D)

Question 4

Predict the actual bond angles in SF3+ 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) D) and E)
G) B) and D) D

Question 5

A molecule which contains polar bonds will always have a dipole moment.

Accepted Answer

A) True 
 B)False

Question 6

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

Question 7

Which of the following has no net dipole moment?

Accepted Answer

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

Question 8

What is the molecular shape of ClF4- as predicted by the VSEPR theory?

Accepted Answer

A)   square pyramidal
B)   square planar
C)   see-saw
D)   octahedral
E)   tetrahedralF) A) and D)
G) B) and C) B

Question 9

In a Lewis structure for a molecule or ion, the sum of the formal charges on the atoms is equal to the charge on the molecule or ion.

Accepted Answer

A) True 
 B)False

Question 10

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

Question 11

Draw Lewis structures, showing all valence electrons, for the following species:
a. S2-
b. CO
c. SO2
d. CH3OH

Accepted Answer

A)11ec6d40_aba9_d0ba_9cd1_27df90ce31a5_...

Question 12

Which of the following atoms can expand its valence shell when bonding?

Accepted Answer

A)   N
B)   C
C)   O
D)   P
E)   AlF) A) and D)
G) D) and E)

Question 13

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

Accepted Answer

A)   SO3
B)   BF3
C)   I3-
D)   SCO (C = central atom) 
E)   SO32-F) A) and B)
G) A) and C)

Question 14

List all possible molecular geometries (shapes)  for a nonpolar molecule with the formula AX4.

Accepted Answer

A)   tetrahedral
B)   seesaw
C)   square planar
D)   either tetrahedral or square planar
E)   any of the above shapesF) B) and E)
G) A) and B)

Question 15

Draw all important resonance structures of the nitrate ion, NO3-

Accepted Answer

Question 16

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 B)
G) C) and E)

Question 17

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 18

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

Accepted Answer

A)   BF4-
B)   XeO3
C)   SiCl4
D)   NH3
E)   CH2Cl2F) A) and C)
G) C) and D)

Question 19

Considering all the bonds in a molecule with trigonal bipyramidal geometry, what are the bond angles present?

Accepted Answer

A)   120° only
B)   90° only
C)   180° only
D)   60° and 90° only
E)   90°, 120°, and 180°F) A) and B)
G) B) and C)

Question 20

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

Exam 10: The Shapes of Molecules

What is the molecular shape of SCl3F as predicted by the VSEPR theory?

Correct AnswerverifiedShow Answer

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

Use VSEPR theory to decide which one of the following molecules and ions will have a trigonal pyramidal geometry. (The central atom is always first in the formula.)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

A molecule which contains polar bonds will always have a dipole moment.

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

Correct AnswerverifiedShow Answer

Which of the following has no net dipole moment?

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What is the molecular shape of ClF4- as predicted by the VSEPR theory?

Correct AnswerverifiedB

In a Lewis structure for a molecule or ion, the sum of the formal charges on the atoms is equal to the charge on the molecule or ion.

Correct AnswerverifiedShow Answer

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

Draw Lewis structures, showing all valence electrons, for the following species: a. S2- b. CO c. SO2 d. CH3OH

Correct AnswerverifiedA)11ec6d40_aba9_d0ba_9cd1_27df90ce31a5_...View AnswerShow Answer

Which of the following atoms can expand its valence shell when bonding?

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

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List all possible molecular geometries (shapes) for a nonpolar molecule with the formula AX4.

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Draw all important resonance structures of the nitrate ion, NO3-

Correct Answerverified11ea8ef8_2b58_6b95_ab0a_fb70444a8199_TB5833_00

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

Correct AnswerverifiedShow Answer

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 species is the central atom (the first atom in the formula) likely to violate the octet rule?

Correct AnswerverifiedShow Answer

Considering all the bonds in a molecule with trigonal bipyramidal geometry, what are the bond angles present?

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Which one of the following Lewis structures is definitely incorrect?

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What is the molecular shape of SCl₃F as predicted by the VSEPR theory?

Correct 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?

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

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D

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

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What is the molecular shape of ClF₄^-as predicted by the VSEPR theory?

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B

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Draw Lewis structures, showing all valence electrons, for the following species: a. S^2- b. CO c. SO₂ d. CH₃OH

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A)11ec6d40_aba9_d0ba_9cd1_27df90ce31a5_...
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List all possible molecular geometries (shapes) for a nonpolar molecule with the formula AX₄.

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Draw all important resonance structures of the nitrate ion, NO₃^-

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According to VSEPR theory, a molecule with the general formula AX₂will have a ___ molecular shape.

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

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