Question 1

Which element is most likely to be "X" in the diatomic molecule shown?

Accepted Answer

A) nitrogen 
B) oxygen 
C) fluorine 
D) hydrogen 
E) helium 
A) nitrogen 
B) oxygen 
C) fluorine 
D) hydrogen 
E) helium B

Question 2

A molecule in which the central atom has no lone pairs and forms four single bonds is said to have a ________ shape.

Accepted Answer

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

Question 3

In a Lewis dot structure the electrons which complete an octet but are not located between two atoms are referred to as

Accepted Answer

A) bonding pairs. 
B) delta minus electrons. 
C) excess electrons. 
D) filled shells. 
E) lone pairs. 
A) bonding pairs. 
B) delta minus electrons. 
C) excess electrons. 
D) filled shells. 
E) lone pairs. E

Question 4

What is the molecular geometry of PH3?

Accepted Answer

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

Question 5

Which representation of a methane molecule is not correct? (A methane molecule is composed of one carbon atom and four hydrogen atoms. )

Accepted Answer

A) CH4 
B) 
  
C) 
  
D) 
  
E) none of the above 
A) CH4 
B) 
  
C) 
  
D) 
  
E) none of the above

Question 6

A bond where the electrons are shared equally is called a(an)________ bond.

Accepted Answer

A) polar covalent 
B) coordinate covalent 
C) nonpolar covalent 
D) ionic 
E) none of the above 
A) polar covalent 
B) coordinate covalent 
C) nonpolar covalent 
D) ionic 
E) none of the above

Question 7

Which group in the Periodic Table is most likely to contain the element X in the molecule whose dot structure is shown?

Accepted Answer

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

Question 8

A section of the Periodic Table containing main group elements is shown.If the elements W,X,Y,and Z have electronegativity values of 1.0,2.0,2.5,and 3.5,respectively,which bond is ionic?

Accepted Answer

A) WY 
B) WZ 
C) XY 
D) XZ 
E) YZ 
A) WY 
B) WZ 
C) XY 
D) XZ 
E) YZ

Question 9

Which element is most likely to form three covalent bonds?

Accepted Answer

A) C 
B) Si 
C) P 
D) S 
E) Se 
A) C 
B) Si 
C) P 
D) S 
E) Se

Question 10

If SiCl4 is named as a covalent compound,what would it be called?

Accepted Answer

A) silicon chloride 
B) chlorosilicate 
C) silicon tetrachloride 
D) sulfur chloride 
E) sulfur tetrachloride 
A) silicon chloride 
B) chlorosilicate 
C) silicon tetrachloride 
D) sulfur chloride 
E) sulfur tetrachloride

Question 11

Match the following.
-iodine heptafluoride

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 12

Match the following.
-ammonia

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

How many double bonds are there in a molecule of SF2?

Accepted Answer

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

Question 14

The carbon dioxide molecule is linear.The electronegativities of C and O are 2.5 and 3.5,respectively.Based on these values and on consideration of molecular geometry,the C-O bond is ________ 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 15

A molecule in which the central atom forms three single bonds and has one lone pair is said to have 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 16

The water molecule has a ________ geometry because its central atom has ________ bonds and ________ lone pairs of electrons.

Accepted Answer

A) bent; two; two 
B) linear; two; two 
C) pyramidal; three; one 
D) tetrahedral; four; zero 
E) planar triangular; three; one 
A) bent; two; two 
B) linear; two; two 
C) pyramidal; three; one 
D) tetrahedral; four; zero 
E) planar triangular; three; one

Question 17

Match the following.
-sulfur hexafluoride

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 18

Which of the following molecules has a CCH bond angle of 180°?

Accepted Answer

A) HCCH 
B) H2CCH2 
C) H3CCH3 
D) H3CCHO 
E) none of them 
A) HCCH 
B) H2CCH2 
C) H3CCH3 
D) H3CCHO 
E) none of them

Question 19

The element least likely to obey the octet rule in forming chemical bonds is

Accepted Answer

A) boron. 
B) carbon. 
C) nitrogen. 
D) oxygen. 
E) fluorine. 
A) boron. 
B) carbon. 
C) nitrogen. 
D) oxygen. 
E) fluorine.

Question 20

The bond angle in the molecule H2S is ________ because the ________.

Accepted Answer

A) exactly 109.5°; S atom has four charge clouds 
B) greater than 109.5°; lone pairs allow the bond angle to expand 
C) less than 109.5°; lone pairs force the hydrogen atoms closer together 
D) exactly 120°; lone pairs are counted as one charge cloud 
E) exactly 180°; the S atom has two bonds 
A) exactly 109.5°; S atom has four charge clouds 
B) greater than 109.5°; lone pairs allow the bond angle to expand 
C) less than 109.5°; lone pairs force the hydrogen atoms closer together 
D) exactly 120°; lone pairs are counted as one charge cloud 
E) exactly 180°; the S atom has two bonds

Exam 4: Molecular Compounds

Which element is most likely to be "X" in the diatomic molecule shown?

A molecule in which the central atom has no lone pairs and forms four single bonds is said to have a ________ shape.

In a Lewis dot structure the electrons which complete an octet but are not located between two atoms are referred to as

What is the molecular geometry of PH3?

Which representation of a methane molecule is not correct? (A methane molecule is composed of one carbon atom and four hydrogen atoms. )

A bond where the electrons are shared equally is called a(an)________ bond.

Which group in the Periodic Table is most likely to contain the element X in the molecule whose dot structure is shown?

A section of the Periodic Table containing main group elements is shown.If the elements W,X,Y,and Z have electronegativity values of 1.0,2.0,2.5,and 3.5,respectively,which bond is ionic?

Which element is most likely to form three covalent bonds?

If SiCl4 is named as a covalent compound,what would it be called?

Match the following. -iodine heptafluoride

Match the following. -ammonia

How many double bonds are there in a molecule of SF2?

The carbon dioxide molecule is linear.The electronegativities of C and O are 2.5 and 3.5,respectively.Based on these values and on consideration of molecular geometry,the C-O bond is ________ and the molecule is ________.

A molecule in which the central atom forms three single bonds and has one lone pair is said to have a ________ shape.

The water molecule has a ________ geometry because its central atom has ________ bonds and ________ lone pairs of electrons.

Match the following. -sulfur hexafluoride

Which of the following molecules has a CCH bond angle of 180°?

The element least likely to obey the octet rule in forming chemical bonds is

The bond angle in the molecule H2S is ________ because the ________.

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

What is the molecular geometry of PH₃?

If SiCl₄ is named as a covalent compound,what would it be called?

How many double bonds are there in a molecule of SF₂?

The carbon dioxide molecule is linear.The electronegativities of C and O are 2.5 and 3.5,respectively.Based on these values and on consideration of molecular geometry,the C-O bond is and the molecule is .

The water molecule has a geometry because its central atom has bonds and lone pairs of electrons.

The bond angle in the molecule H₂S is because the .