Question 1

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

Accepted Answer

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

Question 2

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

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 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) A) and B)
G) All of the above

Question 4

Thionyl chloride is used as an oxidizing and chlorinating agent in organic chemistry.Select the best Lewis structure for SOCl2. 2.   A) a B) b C) c D) d E) None of these structures is suitable for SOCl2." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  None of these structures is suitable for SOCl2.F) A) and D)
G) A) and C)

Question 5

Draw Lewis structures which obey the octet rule,for the following atoms,molecules and ions,showing all valence electrons.Central atoms are shown in bold.
a.NH3
 b.O3 (Hint: O3 is not cyclic)
c.HCN
d.SO3

Accepted Answer

Question 6

Explain what is meant by "dipole moment",and give an example of a molecule which has polar bonds but which does not itself have a dipole moment.

Accepted Answer

A dipole moment arises in a molecule whe...

Question 7

Select the best Lewis structure for P2I4. 2I4.   A) a B) b C) c D) d E) None of these structures is suitable for P2I4." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  None of these structures is suitable for P2I4.F) B) and E)
G) C) and E) A

Question 8

According to VSEPR theory,a molecule with the general formula AX3 will have a ______ molecular shape.

Accepted Answer

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

Question 9

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) C) and E)

Question 10

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

Question 11

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 E)
G) B) and C) A

Question 12

Predict the ideal bond angles around nitrogen in N2F2 using the molecular shape given by the VSEPR theory.
(N is the central atom. )

Accepted Answer

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

Question 13

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

Accepted Answer

A)  trigonal pyramidal
B)  trigonal
C)  tetrahedral
D)  linear
E)  bentF) All of the above
G) B) and E) E

Question 14

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 15

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

Question 16

Select the correct Lewis structure for nitrogen trifluoride,NF3. 3.   A) a B) b C) c D) d E) e" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) B) and D)
G) A) and E)

Question 17

According to VSEPR theory,a molecule with the general formula AX6 will have a ______ molecular shape.

Accepted Answer

A)  tetrahedral
B)  trigonal planar
C)  trigonal bipyramidal
D)  hexagonal
E)  octahedralF) None of the above
G) A) and D)

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 B)
G) None of the above

Question 19

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

Question 20

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 B)
G) A) and C)

Exam 10: The Shapes of Molecules

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

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

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

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Draw Lewis structures which obey the octet rule,for the following atoms,molecules and ions,showing all valence electrons.Central atoms are shown in bold. a.NH3 b.O3 (Hint: O3 is not cyclic) c.HCN d.SO3

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Explain what is meant by "dipole moment",and give an example of a molecule which has polar bonds but which does not itself have a dipole moment.

Correct AnswerverifiedA dipole moment arises in a molecule whe...View AnswerShow Answer

Select the best Lewis structure for P2I4.

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According to VSEPR theory,a molecule with the general formula AX3 will have a ______ molecular shape.

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

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

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

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Predict the ideal bond angles around nitrogen in N2F2 using the molecular shape given by the VSEPR theory. (N is the central atom. )

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

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

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

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Select the correct Lewis structure for nitrogen trifluoride,NF3.

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According to VSEPR theory,a molecule with the general formula AX6 will have a ______ molecular shape.

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

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

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

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

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Draw Lewis structures which obey the octet rule,for the following atoms,molecules and ions,showing all valence electrons.Central atoms are shown in bold. a.NH₃ b.O₃ (Hint: O₃ is not cyclic) c.HCN d.SO₃

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A dipole moment arises in a molecule whe...
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Select the best Lewis structure for P₂I₄.

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According to VSEPR theory,a molecule with the general formula AX₃ will have a ______ molecular shape.

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

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

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Predict the ideal bond angles around nitrogen in N₂F₂ using the molecular shape given by the VSEPR theory. (N is the central atom. )

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

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

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Select the correct Lewis structure for nitrogen trifluoride,NF₃.

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According to VSEPR theory,a molecule with the general formula AX₆ will have a ______ molecular shape.

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

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