Question 1

Which property is most closely associated with covalent molecules?

Accepted Answer

A) It is a gas at room temperature. 
B) It conducts electricity when dissolved in water. 
C) It has a very high melting point. 
D) It is composed of a metal and a nonmetal. 
E) none of these. 
A) It is a gas at room temperature. 
B) It conducts electricity when dissolved in water. 
C) It has a very high melting point. 
D) It is composed of a metal and a nonmetal. 
E) none of these.

Question 2

Match the following.
-oxygen difluoride

Accepted Answer

A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3 
A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3

Question 3

A molecule in which the central atom forms one double bond and two single bonds is said to have a ________ shape.

Accepted Answer

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

Question 4

Match the following.
-iodine monochloride

Accepted Answer

A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3 
A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3

Question 5

When two atoms share one or more pairs of electrons,a covalent bond is formed.

Accepted Answer

A) True 
 B)False

Question 6

Which element listed is the most electronegative?

Accepted Answer

A) aluminum 
B) bromine 
C) chlorine 
D) iodine 
E) sodium 
A) aluminum 
B) bromine 
C) chlorine 
D) iodine 
E) sodium

Question 7

-Which point identifies the maximum repulsion between the two atoms of the diatomic molecule whose potential energy is shown in the graph?

Accepted Answer

The answer of  
-Which point identifies the maximum repulsion...

Question 8

The molecule SiCl4 has a ________ shape.

Accepted Answer

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

Question 9

The element in the list given that is most likely to form a coordinate covalent bond is

Accepted Answer

A) H. 
B) C. 
C) K. 
D) Fe. 
E) Ca. 
A) H. 
B) C. 
C) K. 
D) Fe. 
E) Ca.

Question 10

In a covalent compound the bond length can be defined as

Accepted Answer

A) the distance between any two pairs of electrons. 
B) the distance between the two largest atoms. 
C) the distance between two nuclei when the repulsion is greatest. 
D) the distance between two nuclei when the attraction is greatest. 
E) the distance between two nuclei when repulsion and attraction are balanced. 
A) the distance between any two pairs of electrons. 
B) the distance between the two largest atoms. 
C) the distance between two nuclei when the repulsion is greatest. 
D) the distance between two nuclei when the attraction is greatest. 
E) the distance between two nuclei when repulsion and attraction are balanced.

Question 11

The formula for carbon disulfide is ________.

Accepted Answer

A) CS2 
B) C2S 
C) CSi2 
D) CaS2 
E) (CS)2 
A) CS2 
B) C2S 
C) CSi2 
D) CaS2 
E) (CS)2

Question 12

Match the following.
-carbon tetrachloride

Accepted Answer

A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3 
A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3

Question 13

-Which point identifies the bond length between the two atoms of the diatomic molecule whose potential energy is shown on the graph?

Accepted Answer

The answer of  
-Which point identifies the bond length...

Question 14

For the structure shown,the most likely elements are X = ________ and Y = ________.

Accepted Answer

A) carbon; oxygen 
B) carbon; hydrogen 
C) nitrogen; oxygen 
D) oxygen; carbon 
E) oxygen; hydrogen 
A) carbon; oxygen 
B) carbon; hydrogen 
C) nitrogen; oxygen 
D) oxygen; carbon 
E) oxygen; hydrogen

Question 15

Although noble gases do not normally form covalent compounds,XeO3 has been prepared.The systematic name of this compound is

Accepted Answer

A) trioxy xenon. 
B) trixenon trioxide. 
C) xenon trioxide. 
D) xenon(III)oxide. 
E) none of the above 
A) trioxy xenon. 
B) trixenon trioxide. 
C) xenon trioxide. 
D) xenon(III)oxide. 
E) none of the above

Question 16

A chemical bond formed between two identical atoms is a(an)________ bond.

Accepted Answer

A) atomic 
B) covalent 
C) hydrogen 
D) ionic 
E) molecular 
A) atomic 
B) covalent 
C) hydrogen 
D) ionic 
E) molecular

Question 17

When a non-metal atom bonds with another non-metal atom,an ionic bond is formed.

Accepted Answer

A) True 
 B)False

Question 18

Match the following.
-carbon monoxide

Accepted Answer

A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3 
A) OF2 
B) BrF5 
C) CCI4 
D) N2O4 
E) SF6
F)CO
G)ICl
H)SO2
I)CH4
J)IF7
K)PCI3
L)NH3

Question 19

Consider a bent molecule,such as H2Se,in which the central atom has two lone pairs of electrons.The electronegativities of H and Se are 2.1 and 2.4,respectively.Based on these values and on consideration of molecular geometry,the H-Se bond can be considered almost ________ and the molecule is ________.

Accepted Answer

A) polar; polar 
B) nonpolar; nonpolar 
C) polar; nonpolar 
D) nonpolar; polar 
E) none of the above 
A) polar; polar 
B) nonpolar; nonpolar 
C) polar; nonpolar 
D) nonpolar; polar 
E) none of the above

Question 20

Explain how it is possible for CCl4 to have polar bonds but be a non-polar molecule.A diagram may be helpful in your answer,but it must be explained.

Accepted Answer

(This question could also be asked about

Exam 4: Molecular Compounds

Which property is most closely associated with covalent molecules?

Match the following. -oxygen difluoride

A molecule in which the central atom forms one double bond and two single bonds is said to have a ________ shape.

Match the following. -iodine monochloride

When two atoms share one or more pairs of electrons,a covalent bond is formed.

Which element listed is the most electronegative?

-Which point identifies the maximum repulsion between the two atoms of the diatomic molecule whose potential energy is shown in the graph?

The molecule SiCl4 has a ________ shape.

The element in the list given that is most likely to form a coordinate covalent bond is

In a covalent compound the bond length can be defined as

The formula for carbon disulfide is ________.

Match the following. -carbon tetrachloride

-Which point identifies the bond length between the two atoms of the diatomic molecule whose potential energy is shown on the graph?

For the structure shown,the most likely elements are X = ________ and Y = ________.

Although noble gases do not normally form covalent compounds,XeO3 has been prepared.The systematic name of this compound is

A chemical bond formed between two identical atoms is a(an)________ bond.

When a non-metal atom bonds with another non-metal atom,an ionic bond is formed.

Match the following. -carbon monoxide

Explain how it is possible for CCl4 to have polar bonds but be a non-polar molecule.A diagram may be helpful in your answer,but it must be explained.

Matter and Measurements

Atoms and the Periodic Table

Ionic Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

The molecule SiCl₄ has a ________ shape.

For the structure shown,the most likely elements are X = and Y = .

Although noble gases do not normally form covalent compounds,XeO₃ has been prepared.The systematic name of this compound is

Explain how it is possible for CCl₄ to have polar bonds but be a non-polar molecule.A diagram may be helpful in your answer,but it must be explained.