Question 1

The molecule AX3,in which A is the central atom,is polar and obeys the octet rule; therefore,

Accepted Answer

A)  A has two lone pairs.
B)  A has one lone pair.
C)  A has no lone pairs.
D)  A has four bonding pairs.
E)  A has three lone pairs.

Question 2

What is the C-C-H bond angle in H2CCO?

Accepted Answer

A)  109°
B)  180°
C)  120°
D)  144°
E)  90°

Question 3

Given the molecular orbital diagram for dihydrogen (H2) below,what would be the bond order of He2+
?
​ 2) below,what would be the bond order of He2+ ? ​   A)    B)    C) 1 D) 0 E) 2" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   2) below,what would be the bond order of He2+ ? ​   
A)     
B)     
C)  1 
D)  0 
E)  2" class="answers-bank-image d-inline" rel="preload" >
B)   2) below,what would be the bond order of He2+ ? ​   
A)     
B)     
C)  1 
D)  0 
E)  2" class="answers-bank-image d-inline" rel="preload" >
C)  1
D)  0
E)  2

Question 4

The approximate CCO angle in acetone,  ,is

Accepted Answer

A)  180°.
B)  90°.
C)  109°.
D)  60°.
E)  120°.

Question 5

What is the electron geometry (or electron arrangement) around an atom in a molecule or ion which is surrounded by three lone pairs of electrons and two single bonds.

Accepted Answer

A)  trigonal bipyramidal
B)  see-saw or distorted tetrahedron
C)  T-shaped
D)  linear
E)  trigonal planar

Question 6

Which molecule does not have a planar molecular geometry?

Accepted Answer

A)  SO3
B)  HCCH
C)  N2H4
D)  HNNH
E)  C2F4

Question 7

What is the molecular geometry around an atom in a molecule or ion which is surrounded by one lone pair of electrons and four single bonds.

Accepted Answer

A)  see-saw or distorted tetrahedron
B)  trigonal bipyramidal
C)  linear
D)  T-shaped
E)  trigonal planar

Question 8

Which of the following molecules is nonpolar?

Accepted Answer

A)  SF4
B)  PF5
C)  ClF3
D)  PF3
E)  CH2F2

Question 9

Which molecule or ion is not planar?

Accepted Answer

A)  CO32-
B)  Cl2CCCl2
C)  HNNH
D)  H3O+
E)  F2CO

Question 10

Which molecule or ion does not have a tetrahedral molecular geometry?

Accepted Answer

A)  BF4-
B)  NF4+
C)  GeF4
D)  XeF4
E)  BeF42-

Question 11

Which of the following molecules has a dipole moment?

Accepted Answer

A)  SO2
B)  CS2
C)  ClCCCCCl
D)  CCl4
E)  HCCH

Question 12

Which of the following compounds is nonpolar?

Accepted Answer

A)  H2S
B)  XeF2
C)  SO2
D)  N2O
E)  HCl

Question 13

Which of the following characteristics does not apply to PF3?

Accepted Answer

A)  has three σ bonds
B)  contains polar bonds
C)  polar molecule
D)  one lone pair of electrons on phosphorus
E)  trigonal planar

Question 14

In the ICl4- ion,the electron pairs are arranged around the central iodine atom in the shape of

Accepted Answer

A)  a tetrahedron.
B)  an octahedron.
C)  a square plane.
D)  a trigonal bipyramid.
E)  a trigonal pyramid.

Question 15

Which of the labeled carbons (C1-C4) is/are sp-hybridized?
​ 1-C4) is/are sp-hybridized? ​   A) carbon three B) carbon one C) carbon two and four D) carbon two E) carbon one and three" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  carbon three
B)  carbon one
C)  carbon two and four
D)  carbon two
E)  carbon one and three

Question 16

In the I3- ion,how many electron groups surround the central atom?

Accepted Answer

A)  5
B)  3
C)  6
D)  4
E)  2

Question 17

Which molecule or ion is paramagnetic?

Accepted Answer

A)  NO2+
B)  OCN-
C)  NO2-
D)  NO
E)  SO3

Question 18

In the hydronium ion,H3O+,the electron groups are arranged about the central oxygen atom in a

Accepted Answer

A)  tetrahedron.
B)  square plane.
C)  pyramid.
D)  trigonal plane.
E)  bent structure.

Question 19

When an atom in a molecule or ion is described as sp3d1 hybridized,its molecular geometry is

Accepted Answer

A)  trigonal bipyramidal.
B)  trigonal planar.
C)  linear.
D)  tetrahedral.
E)  octahedral.

Question 20

What is the hybridization of Se in SeF6?

Accepted Answer

A)  sp3d
B)  sp3d2
C)  sp2
D)  sp
E)  sp3

Exam 10: Molecular Geometry and Chemical Bonding Theory

Which molecule or ion is paramagnetic?

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What is the C-C-H bond angle in H2CCO?

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In the ICl4- ion,the electron pairs are arranged around the central iodine atom in the shape of

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Given the molecular orbital diagram for dihydrogen (H2) below,what would be the bond order of He2+ ? ​

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What is the hybridization of Se in SeF6?

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When an atom in a molecule or ion is described as sp3d1 hybridized,its molecular geometry is

Correct AnswerverifiedShow Answer

Which molecule or ion does not have a tetrahedral molecular geometry?

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Which of the following characteristics does not apply to PF3?

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Which molecule does not have a planar molecular geometry?

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In the hydronium ion,H3O+,the electron groups are arranged about the central oxygen atom in a

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Which of the following compounds is nonpolar?

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The approximate CCO angle in acetone, ,is

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Which of the following molecules is nonpolar?

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In the I3- ion,how many electron groups surround the central atom?

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The molecule AX3,in which A is the central atom,is polar and obeys the octet rule; therefore,

Correct AnswerverifiedShow Answer

Which of the labeled carbons (C1-C4) is/are sp-hybridized? ​

Correct AnswerverifiedShow Answer

What is the electron geometry (or electron arrangement) around an atom in a molecule or ion which is surrounded by three lone pairs of electrons and two single bonds.

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Which molecule or ion is not planar?

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Which of the following molecules has a dipole moment?

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What is the molecular geometry around an atom in a molecule or ion which is surrounded by one lone pair of electrons and four single bonds.

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What is the C-C-H bond angle in H₂CCO?

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In the ICl₄^- ion,the electron pairs are arranged around the central iodine atom in the shape of

Correct Answer
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Given the molecular orbital diagram for dihydrogen (H₂) below,what would be the bond order of He₂+ ?

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What is the hybridization of Se in SeF₆?

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When an atom in a molecule or ion is described as sp³d¹ hybridized,its molecular geometry is

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Which of the following characteristics does not apply to PF₃?

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In the hydronium ion,H₃O⁺,the electron groups are arranged about the central oxygen atom in a

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In the I₃^- ion,how many electron groups surround the central atom?

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The molecule AX₃,in which A is the central atom,is polar and obeys the octet rule; therefore,

Correct Answer
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Which of the labeled carbons (C₁-C₄) is/are sp-hybridized?

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