Question 1

What is the difference between a dipole-dipole interaction and an ion-dipole interaction?

Accepted Answer

A) one involves dipole attraction between neutral molecules while the other involves dipole interactions with ions 
B) one involves hydrogen bonding while the other does not 
C) one involves salts and water while the other doesn't involve water 
D) one involves ionic molecules interacting with other ionic molecules while the other deals with polar molecules 
E) none of the above 
A) one involves dipole attraction between neutral molecules while the other involves dipole interactions with ions 
B) one involves hydrogen bonding while the other does not 
C) one involves salts and water while the other doesn't involve water 
D) one involves ionic molecules interacting with other ionic molecules while the other deals with polar molecules 
E) none of the above

Question 2

Which of the following molecules is most likely to show a dipole-dipole interaction?

Accepted Answer

A) CH3OH 
B) CH3SH 
C) CH4 
D) H-C   C-H 
E) A and B 
A) CH3OH 
B) CH3SH 
C) CH4 
D) H-C   C-H 
E) A and B

Question 3

Which of the following statements best describes a relatively polar bond?

Accepted Answer

A) a very electronegative atom and a weakly electronegative atom are covalently bound 
B) two very electronegative atoms are covalently bound 
C) two very electronegative atoms undergo ionic bonding 
D) two weakly electronegative atoms undergo ionic bonding 
E) none of the above 
A) a very electronegative atom and a weakly electronegative atom are covalently bound 
B) two very electronegative atoms are covalently bound 
C) two very electronegative atoms undergo ionic bonding 
D) two weakly electronegative atoms undergo ionic bonding 
E) none of the above

Question 4

Which of the following molecules should have the same molecular shape and approximate bond angles as ammonia,   ?

Accepted Answer

A) BH3 
B) CH4 
C) SO3 
D) PH3 
E) NO2 
A) BH3 
B) CH4 
C) SO3 
D) PH3 
E) NO2

Question 5

How many nonbonding pairs of electrons are in the following molecule? H-H

Accepted Answer

A) 1 pair 
B) 6 pairs 
C) 0 pairs 
D) 8 pairs 
E) none of the above 
A) 1 pair 
B) 6 pairs 
C) 0 pairs 
D) 8 pairs 
E) none of the above

Question 6

Magnesium ions carry a 2+ charge, and chloride ions carry a 1- charge. What is the chemical formula for the ionic compound magnesium chloride?

Accepted Answer

A) MgCl 
B) Mg2Cl 
C) MgCl2 
D) Mg2Cl2 
A) MgCl 
B) Mg2Cl 
C) MgCl2 
D) Mg2Cl2

Question 7

Which of the following bonds would be the most polar?

Accepted Answer

A) C-F 
B) C-Cl 
C) C-Br 
D) C-I 
E) All are equally polar. 
A) C-F 
B) C-Cl 
C) C-Br 
D) C-I 
E) All are equally polar.

Question 8

Many of the macroscopic properties of a compound depend on ________.

Accepted Answer

A) how the atoms of the molecules are held together 
B) the mass of the constituent atoms 
C) the number of nucleons present in the sample 
D) the size of the sample 
E) how the atoms absorb light and the shape of the orbitals 
A) how the atoms of the molecules are held together 
B) the mass of the constituent atoms 
C) the number of nucleons present in the sample 
D) the size of the sample 
E) how the atoms absorb light and the shape of the orbitals

Question 9

The source of an atom's electronegativity is the

Accepted Answer

A) repulsive force occurring among electrons within the same shell. 
B) repulsive force occurring between electrons within neighboring shells. 
C) positively charged atomic nucleus. 
D) kinetic energy electrons have orbiting the nucleus. 
A) repulsive force occurring among electrons within the same shell. 
B) repulsive force occurring between electrons within neighboring shells. 
C) positively charged atomic nucleus. 
D) kinetic energy electrons have orbiting the nucleus.

Question 10

Which of the following does not describe ionic compounds?

Accepted Answer

A) They have a tendency to melt easily. 
B) They consist of positive and negative ions. 
C) They are held together by electrostatic attraction. 
D) They are usually very ordered. 
E) none of the above 
A) They have a tendency to melt easily. 
B) They consist of positive and negative ions. 
C) They are held together by electrostatic attraction. 
D) They are usually very ordered. 
E) none of the above

Question 11

Why is metal shiny?

Accepted Answer

A) The loose electrons reflect most wavelengths of light. 
B) The electrons transmit most wavelengths of light. 
C) The electrons absorb each light wave. 
D) The electrons emit light due to electronic excitation. 
E) all of the above 
A) The loose electrons reflect most wavelengths of light. 
B) The electrons transmit most wavelengths of light. 
C) The electrons absorb each light wave. 
D) The electrons emit light due to electronic excitation. 
E) all of the above

Question 12

Why are ores so valuable?

Accepted Answer

A) They are sources of naturally occurring gold. 
B) Metals can be efficiently extracted from them. 
C) They tend to occur in scenic mountainous regions. 
D) They hold many clues to Earth's natural history. 
A) They are sources of naturally occurring gold. 
B) Metals can be efficiently extracted from them. 
C) They tend to occur in scenic mountainous regions. 
D) They hold many clues to Earth's natural history.

Question 13

Which molecule is most polar?

Accepted Answer

A) S=C=S 
B) O=C=O 
C) O=C=S 
D) These all have the same polarity. 
A) S=C=S 
B) O=C=O 
C) O=C=S 
D) These all have the same polarity.

Question 14

Which of the above substances would have the lowest boiling point?

Accepted Answer

A) a 
B) b 
C) c 
D) All boil at the same temperature. 
E) All are gases. 
A) a 
B) b 
C) c 
D) All boil at the same temperature. 
E) All are gases.

Question 15

How many covalent bonds would the following generic atom usually form?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 8 
E) would usually not form any covalent bonds 
A) 1 
B) 2 
C) 4 
D) 8 
E) would usually not form any covalent bonds

Question 16

If a neutral atom gains two electrons, what is the electrical charge of the atom?

Accepted Answer

A) -1 
B) +1 
C) -2 
D) +2 
E) neutral 
A) -1 
B) +1 
C) -2 
D) +2 
E) neutral

Question 17

How many valence electrons does boron (B, atomic no. = 5)have?

Accepted Answer

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

Question 18

Which of the following elements will most likely form an ion with a +1 charge?

Accepted Answer

A) Na 
B) Mg 
C) Al 
D) Si 
E) Cl 
A) Na 
B) Mg 
C) Al 
D) Si 
E) Cl

Question 19

In terms of the periodic table, is there an abrupt or gradual change between ionic and covalent bonds?

Accepted Answer

A) There is an abrupt change that occurs across the metalloids. 
B) Actually, any element of the periodic table can form a covalent bond. 
C) There is a gradual change: the farther apart, the more ionic. 
D) Whether an element forms one or the other depends on nuclear charge and not the relative positions in the periodic table. 
A) There is an abrupt change that occurs across the metalloids. 
B) Actually, any element of the periodic table can form a covalent bond. 
C) There is a gradual change: the farther apart, the more ionic. 
D) Whether an element forms one or the other depends on nuclear charge and not the relative positions in the periodic table.

Question 20

Which of the following describes an aqueous solution?

Accepted Answer

A) a mixture of some compound dissolved in water 
B) a mixture of polar molecules dissolved in a nonpolar solvent 
C) a mixture of water dispersed in an ionic compound 
D) a mixture of nonpolar molecules dissolved in a polar solvent 
E) none of the above 
A) a mixture of some compound dissolved in water 
B) a mixture of polar molecules dissolved in a nonpolar solvent 
C) a mixture of water dispersed in an ionic compound 
D) a mixture of nonpolar molecules dissolved in a polar solvent 
E) none of the above

Exam 15: How Atoms Bond and Molecules Attract

What is the difference between a dipole-dipole interaction and an ion-dipole interaction?

Which of the following molecules is most likely to show a dipole-dipole interaction?

Which of the following statements best describes a relatively polar bond?

Which of the following molecules should have the same molecular shape and approximate bond angles as ammonia, ?

How many nonbonding pairs of electrons are in the following molecule? H-H

Magnesium ions carry a 2+ charge, and chloride ions carry a 1- charge. What is the chemical formula for the ionic compound magnesium chloride?

Which of the following bonds would be the most polar?

Many of the macroscopic properties of a compound depend on ________.

The source of an atom's electronegativity is the

Which of the following does not describe ionic compounds?

Why is metal shiny?

Why are ores so valuable?

Which molecule is most polar?

Which of the above substances would have the lowest boiling point?

How many covalent bonds would the following generic atom usually form?

If a neutral atom gains two electrons, what is the electrical charge of the atom?

How many valence electrons does boron (B, atomic no. = 5)have?

Which of the following elements will most likely form an ion with a +1 charge?

In terms of the periodic table, is there an abrupt or gradual change between ionic and covalent bonds?

Which of the following describes an aqueous solution?

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Timereading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: the Nature of Science

Filters