Question 1

An atom in a molecule has two lone pairs and two atoms bonded to it.What is the molecular geometry of this atom?

Accepted Answer

A)   linear
B)   bent
C)   trigonal planar
D)   trigonal pyramidal
E)   tetrahedral

Question 2

In molecules with permanent dipoles, _______ are the attraction of the positive end of a dipole on one molecule with the negative end of the dipole on another molecule.

Accepted Answer

A)   ionic bonding
B)   covalent bonding
C)   dispersion forces
D)   dipole-dipole forces
E)   hydrogen bonding forces

Question 3

An atom in a molecule has one lone pair and three atoms bonded to it.What is the molecular geometry of this atom?

Accepted Answer

A)   linear
B)   bent
C)   trigonal planar
D)   trigonal pyramidal
E)   tetrahedral

Question 4

How many electron groups are found on the nitrogen atom of nitrogen trichloride (NCl3) ?

Accepted Answer

A)   one
B)   two
C)   three
D)   four
E)   five

Question 5

An atom in a molecule has a trigonal planar molecular geometry and a formula of MX3.What is the angle between the atoms in this molecule?

Accepted Answer

A)   360º
B)   180º
C)   120º
D)   109.5º
E)   90º

Question 6

Which of the molecules below does NOT have a permanent dipole?

Accepted Answer

A)   structure a
B)   structure b
C)   structure c
D)   structure d
E)   structure e

Question 7

Does formaldehyde have a permanent dipole?

Accepted Answer

A)   Yes.The carbon is partially negative, and the oxygen is partially positive.
B)   Yes.The carbon is partially negative, and the hydrogen is partially positive.
C)   Yes.The carbon is partially positive, and the oxygen is partially negative.
D)   Yes.The carbon is partially positive, and the hydrogen is partially negative.
E)   No.Formaldehyde only has a temporary dipole.

Question 8

What is the electron geometry of the carbon in chloroform (CHCl3) ?

Accepted Answer

A)   linear
B)   bent
C)   trigonal planar
D)   trigonal pyramidal
E)   tetrahedral

Question 9

Formaldehyde is used as a preservative and disinfectant.It has the structure shown below.What is the strongest type of intermolecular interaction attracting molecules of formaldehyde together?

Accepted Answer

A)   ionic bonding
B)   covalent bonding
C)   dispersion forces
D)   dipole-dipole forces
E)   hydrogen bonding forces

Question 10

Which element is the LEAST electronegative?

Accepted Answer

A)   potassium
B)   hydrogen
C)   fluorine
D)   carbon
E)   oxygen

Question 11

Which type(s) of molecular model illustrate the three-dimensional shape of a molecule?

Accepted Answer

A)   ball-and-stick
B)   Lewis dot structure
C)   space-filling
D)   Lewis dot and space-filling
E)   ball-and-stick and space-filling

Question 12

What is the molecular geometry of the carbon in dichloromethane (CH2Cl2) ?

Accepted Answer

A)   linear
B)   bent
C)   trigonal planar
D)   trigonal pyramidal
E)   tetrahedral

Question 13

What is the strongest type of intermolecular interaction attracting molecules of propane together?

Accepted Answer

A)   ionic bonding
B)   covalent bonding
C)   dispersion forces
D)   dipole-dipole forces
E)   hydrogen bonding forces

Question 14

Which of the following interactions is the strongest?

Accepted Answer

A)   dipole-dipole forces
B)   hydrogen bonding forces
C)   dispersion forces
D)   covalent bond
E)   All of the above interactions have the same strength.

Question 15

What is the molecular geometry of the atoms bonded to the nitrogen atom indicated with arrow II?

Accepted Answer

A)   bent
B)   trigonal planar
C)   trigonal pyramidal
D)   tetrahedral
E)   linear

Question 16

Nitrogen trichloride, once used as a bleaching agent, causes neurological disorder and was banned in 1949.Which of the following is a correct Lewis structure for nitrogen trichloride (NCl3) ? 3) ?   A)  structure a B)  structure b C)  structure c D)  structure d" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   structure a
B)   structure b
C)   structure c
D)   structure d

Question 17

Which of the following molecules contains polar bonds but is nonpolar overall?

Accepted Answer

A)   Cl2
B)   CF4
C)   H2O
D)   N2
E)   NH3

Question 18

How many nonbonding pairs are on the carbon in dichloromethane (CH2Cl2) ?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4

Question 19

Ethylene is used as a starting material in making plastics.It has a molecular formula of C2H4.Which of the following structures is the correct Lewis structure for ethylene? 2H4.Which of the following structures is the correct Lewis structure for ethylene?   A)  structure a B)  structure b C)  structure c D)  structure d E)  structure e" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   structure a
B)   structure b
C)   structure c
D)   structure d
E)   structure e

Question 20

Which of the following steps is done first to determine the molecular geometry of dichloromethane (CH2Cl2) ?

Accepted Answer

A)   Calculate the molecular weight.
B)   Look up the bond angle of a H-C-H bond.
C)   Determine the electron geometry.
D)   Construct the Lewis structure.
E)   The molecular geometry can be determined without doing any prior steps.

Exam 4: Molecular Geometry, Polarity, and Intermolecular

How many electron groups are found on the nitrogen atom of nitrogen trichloride (NCl3) ?

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Nitrogen trichloride, once used as a bleaching agent, causes neurological disorder and was banned in 1949.Which of the following is a correct Lewis structure for nitrogen trichloride (NCl3) ?

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What is the electron geometry of the carbon in chloroform (CHCl3) ?

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What is the strongest type of intermolecular interaction attracting molecules of propane together?

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Which element is the LEAST electronegative?

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Formaldehyde is used as a preservative and disinfectant.It has the structure shown below.What is the strongest type of intermolecular interaction attracting molecules of formaldehyde together?

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What is the molecular geometry of the atoms bonded to the nitrogen atom indicated with arrow II?

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An atom in a molecule has one lone pair and three atoms bonded to it.What is the molecular geometry of this atom?

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Does formaldehyde have a permanent dipole?

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An atom in a molecule has a trigonal planar molecular geometry and a formula of MX3.What is the angle between the atoms in this molecule?

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Which of the following molecules contains polar bonds but is nonpolar overall?

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Ethylene is used as a starting material in making plastics.It has a molecular formula of C2H4.Which of the following structures is the correct Lewis structure for ethylene?

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Which of the following steps is done first to determine the molecular geometry of dichloromethane (CH2Cl2) ?

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What is the molecular geometry of the carbon in dichloromethane (CH2Cl2) ?

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Which type(s) of molecular model illustrate the three-dimensional shape of a molecule?

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An atom in a molecule has two lone pairs and two atoms bonded to it.What is the molecular geometry of this atom?

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Which of the molecules below does NOT have a permanent dipole?

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Which of the following interactions is the strongest?

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How many nonbonding pairs are on the carbon in dichloromethane (CH2Cl2) ?

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In molecules with permanent dipoles, _______ are the attraction of the positive end of a dipole on one molecule with the negative end of the dipole on another molecule.

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How many electron groups are found on the nitrogen atom of nitrogen trichloride (NCl₃) ?

Correct Answer
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Nitrogen trichloride, once used as a bleaching agent, causes neurological disorder and was banned in 1949.Which of the following is a correct Lewis structure for nitrogen trichloride (NCl₃) ?

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What is the electron geometry of the carbon in chloroform (CHCl₃) ?

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An atom in a molecule has a trigonal planar molecular geometry and a formula of MX₃.What is the angle between the atoms in this molecule?

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Ethylene is used as a starting material in making plastics.It has a molecular formula of C₂H₄.Which of the following structures is the correct Lewis structure for ethylene?

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Which of the following steps is done first to determine the molecular geometry of dichloromethane (CH₂Cl₂) ?

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What is the molecular geometry of the carbon in dichloromethane (CH₂Cl₂) ?

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How many nonbonding pairs are on the carbon in dichloromethane (CH₂Cl₂) ?

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