Question 1

How many covalent bonds are generally formed by an oxygen atom?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5

Question 2

The structures shown below are resonance structures of sulfur dioxide.  and

Accepted Answer

A) True 
 B)False

Question 3

In the valence shell electron pair repulsion (VSEPR)theory,a group is defined as an atom or a lone pair of electrons.

Accepted Answer

A) True 
 B)False

Question 4

Atoms with three valence electrons generally form five bonds.

Accepted Answer

A) True 
 B)False

Question 5

Carbon usually forms four bonds in stable molecules. However unstable carbon compounds with less than four bonds are known. The methyl carbanion shown below is an example. The molecular shape around the carbon atom in this structure is ________.

Accepted Answer

The answer of Carbon usually forms four bonds in stable...

Question 6

Which of the following elements will generally form only one covalent bond?

Accepted Answer

A)  Sulfur
B)  Carbon
C)  Hydrogen
D)  Argon
E)  Nitrogen

Question 7

Which statement concerning chemical bonds is FALSE?

Accepted Answer

A)  A covalent bond involves the sharing of electrons between two nonmetal atoms.
B)  An ionic bond is the attraction between oppositely charged ions.
C)  A nonpolar bond is a covalent bond in which electrons are not shared equally between the atoms.
D)  Electronegativity is a measure of the attraction an atom has for the electrons it shares in a bond.

Question 8

Nonpolar molecules may contain polar bonds.

Accepted Answer

A) True 
 B)False

Question 9

Which choice would be named carbon tetrachloride?

Accepted Answer

A)  CCl
B)  C4Cl
C)  CCl4
D)  CCl3
E)  C3Cl

Question 10

The Lewis structure shown below is not a valid Lewis structure. What statement best describes the error in the structure?

Accepted Answer

A)  The nitrogen atoms violate the octet rule.
B)  The chlorine atoms violate the octet rule.
C)  The structure contains an incorrect number of valence electrons.
D)  Chlorine atoms and nitrogen atoms do not typically form bonds with each other.

Question 11

Which molecule's Lewis structure contains an atom that violates the octet rule?

Accepted Answer

A)  H2O
B)  BeH2
C)  PCl3
D)  H2Se

Question 12

A N-O bond is more polar than a P-O bond.

Accepted Answer

A) True 
 B)False

Question 13

Which is the correct Lewis structure for OBr-?

Accepted Answer

A)   -? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   -? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   -? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   -? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   -? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >

Question 14

Some covalent compounds are solids,some are liquids,and some are gases at room temperature.

Accepted Answer

A) True 
 B)False

Question 15

Carbon tetrachloride has ________ valence electrons.

Accepted Answer

A)  4 (four) 
B)  8 (eight) 
C)  24 (twenty-four) 
D)  32 (thirty-two) 
E)  40 (forty)

Question 16

Which of the following is classified as a group in the valence shell electron pair repulsion (VSEPR) theory?

Accepted Answer

A)  An atom
B)  A lone pair of electrons
C)  A valence electron
D)  Either an atom or a valence electron
E)  Either an atom or a lone pair of electrons

Question 17

Double bonds and triple bonds are never polar bonds.

Accepted Answer

A) True 
 B)False

Question 18

When writing Lewis structures,the symbol below is placed between resonance structures.

Accepted Answer

A) True 
 B)False

Question 19

The Lewis structure of formaldehyde is shown below. Which statement concerning this structure is INCORRECT?

Accepted Answer

A)  Two electrons are being shared between the carbon atom and the oxygen atom.
B)  The oxygen atom has four valence electrons that are not being shared with another atom.
C)  The oxygen and carbon atoms each have an octet of electrons in their valence shells.
D)  The hydrogen atoms have filled valence shells.

Question 20

C-H bonds are considered to be nonpolar,because the electronegativity difference between carbon and hydrogen is small.

Accepted Answer

A) True 
 B)False

Exam 4: Covalent Compounds

The structures shown below are resonance structures of sulfur dioxide. and

Correct AnswerverifiedShow Answer

The Lewis structure shown below is not a valid Lewis structure. What statement best describes the error in the structure?

Correct AnswerverifiedShow Answer

Carbon usually forms four bonds in stable molecules. However unstable carbon compounds with less than four bonds are known. The methyl carbanion shown below is an example. The molecular shape around the carbon atom in this structure is ________.

Correct AnswerverifiedShow Answer

Which is the correct Lewis structure for OBr-?

Correct AnswerverifiedShow Answer

The Lewis structure of formaldehyde is shown below. Which statement concerning this structure is INCORRECT?

Correct AnswerverifiedShow Answer

Some covalent compounds are solids,some are liquids,and some are gases at room temperature.

Correct AnswerverifiedShow Answer

Carbon tetrachloride has ________ valence electrons.

Correct AnswerverifiedShow Answer

Which choice would be named carbon tetrachloride?

Correct AnswerverifiedShow Answer

Which of the following is classified as a group in the valence shell electron pair repulsion (VSEPR) theory?

Correct AnswerverifiedShow Answer

Which molecule's Lewis structure contains an atom that violates the octet rule?

Correct AnswerverifiedShow Answer

Nonpolar molecules may contain polar bonds.

Correct AnswerverifiedShow Answer

Which statement concerning chemical bonds is FALSE?

Correct AnswerverifiedShow Answer

When writing Lewis structures,the symbol below is placed between resonance structures.

Correct AnswerverifiedShow Answer

Which of the following elements will generally form only one covalent bond?

Correct AnswerverifiedShow Answer

A N-O bond is more polar than a P-O bond.

Correct AnswerverifiedShow Answer

Atoms with three valence electrons generally form five bonds.

Correct AnswerverifiedShow Answer

How many covalent bonds are generally formed by an oxygen atom?

Correct AnswerverifiedShow Answer

C-H bonds are considered to be nonpolar,because the electronegativity difference between carbon and hydrogen is small.

Correct AnswerverifiedShow Answer

In the valence shell electron pair repulsion (VSEPR)theory,a group is defined as an atom or a lone pair of electrons.

Correct AnswerverifiedShow Answer

Double bonds and triple bonds are never polar bonds.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which is the correct Lewis structure for OBr^-?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified