Question 1

Glass is ________ whereas quartz is ________.

Accepted Answer

A) hard, soft 
B) crystalline, amorphous 
C) amorphous, crystalline 
D) pure SiO2, a mixture of SiO2 and carbonates 
E) breakable, not breakable 
A) hard, soft 
B) crystalline, amorphous 
C) amorphous, crystalline 
D) pure SiO2, a mixture of SiO2 and carbonates 
E) breakable, not breakable

Question 2

How many oxygen atoms are bonded to each silicon atom in SiO2?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) none 
A) 1 
B) 2 
C) 3 
D) 4 
E) none

Question 3

Which of the following is not an allotropic form of carbon?

Accepted Answer

A) graphite 
B) diamond 
C) carbide 
D) buckminsterfullerene 
E) All of the above are allotropic forms of carbon. 
A) graphite 
B) diamond 
C) carbide 
D) buckminsterfullerene 
E) All of the above are allotropic forms of carbon.

Question 4

Boron can violate the octet rule in its compounds in that ________.

Accepted Answer

A) it can have an expanded octet 
B) it can exist in a molecule with an odd number of electrons 
C) its compounds are all ionic 
D) it can have fewer than eight valence electrons 
E) Boron cannot violate the octet rule. 
A) it can have an expanded octet 
B) it can exist in a molecule with an odd number of electrons 
C) its compounds are all ionic 
D) it can have fewer than eight valence electrons 
E) Boron cannot violate the octet rule.

Question 5

Hydrogen can combine with ________ to form a metallic hydride.

Accepted Answer

A) an element from group 5A 
B) an element from group 7A 
C) an element from group 8A 
D) an element from group 1A 
E) an element from group 6A 
A) an element from group 5A 
B) an element from group 7A 
C) an element from group 8A 
D) an element from group 1A 
E) an element from group 6A

Question 6

The instability of xenon fluorides is due to its negative enthalpy of formation.

Accepted Answer

A) True 
 B)False

Question 7

Of Li, K, P and Ne which is the least electronegative?

Accepted Answer

The answer of Of Li, K, P and Ne which...

Question 8

The reduction of metal oxides uses carbon monoxide.

Accepted Answer

A) True 
 B)False

Question 9

The oxidation number of B in B2O3 is ________.

Accepted Answer

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

Question 10

The dissolution of 1.0 mol of ________ to 1.0 L of water at 25 °C would yield the most acidic solution.

Accepted Answer

A) SO3 
B) CO2 
C) CO 
D) MgO 
E) CaO 
A) SO3 
B) CO2 
C) CO 
D) MgO 
E) CaO

Question 11

B2O3 is the anhydride of ________.

Accepted Answer

A) borous acid 
B) diborane 
C) tetraboric acid 
D) boric acid 
E) borax 
A) borous acid 
B) diborane 
C) tetraboric acid 
D) boric acid 
E) borax

Question 12

Which equation correctly represents the reaction between carbon dioxide and water?

Accepted Answer

A) CO2 (aq) + H2O (l) → H2CO3 (aq) 
B) CO2 (aq) + H2O (l) → H2 (g) + CO (g) + O2 (g) 
C) CO2 (aq) + H2O (l) → H2O2 (aq) + CO (g) 
D) CO2 (aq) + 2H2O (l) → CH4 (g) + 2O2 (aq) 
E) CO2 (aq) + H2O (l) → H2CO (aq) + O2 (g) 
A) CO2 (aq) + H2O (l) → H2CO3 (aq) 
B) CO2 (aq) + H2O (l) → H2 (g) + CO (g) + O2 (g) 
C) CO2 (aq) + H2O (l) → H2O2 (aq) + CO (g) 
D) CO2 (aq) + 2H2O (l) → CH4 (g) + 2O2 (aq) 
E) CO2 (aq) + H2O (l) → H2CO (aq) + O2 (g)

Question 13

Tetraboric acid, H2B4O7, is prepared by heating boric acid, H3BO3 (a condensation reaction involving water loss). If 400.0 mmol H3BO3 are used, what mass (g)of H2O is formed, assuming quantitative stoichiometric conversion?

Accepted Answer

A) 5.77 
B) 0.500 
C) 0.320 
D) 7.21 
E) 9.01 
A) 5.77 
B) 0.500 
C) 0.320 
D) 7.21 
E) 9.01

Question 14

What is meant by the term "composite"?

Accepted Answer

a combinat

Question 15

To produce carbon black, ________.

Accepted Answer

A) diamond is exposed to extremely high pressures and temperatures 
B) wood is strongly heated in the absence of oxygen 
C) coal is strongly heated in the absence of oxygen 
D) hydrocarbons such as methane are heated in a very limited supply of oxygen 
E) graphite is cooled to -273 °C 
A) diamond is exposed to extremely high pressures and temperatures 
B) wood is strongly heated in the absence of oxygen 
C) coal is strongly heated in the absence of oxygen 
D) hydrocarbons such as methane are heated in a very limited supply of oxygen 
E) graphite is cooled to -273 °C

Question 16

The oxidation state of silicon in SiO44- is ________.

Accepted Answer

A) 0 
B) +6 
C) +2 
D) +4 
E) -4 
A) 0 
B) +6 
C) +2 
D) +4 
E) -4

Question 17

The correct name for the BH4- ion is ________.

Accepted Answer

A) borate 
B) boride 
C) borohydride 
D) borite 
E) hydroboride 
A) borate 
B) boride 
C) borohydride 
D) borite 
E) hydroboride

Question 18

The oxidation state of oxygen in O2F2 is ________.

Accepted Answer

A) +1 
B) -1 
C) +2 
D) 0 
E) -2 
A) +1 
B) -1 
C) +2 
D) 0 
E) -2

Question 19

Which halogen can react with fluorine to form the compound XF7?

Accepted Answer

A) bromine 
B) fluorine 
C) chlorine 
D) iodine 
E) astatine 
A) bromine 
B) fluorine 
C) chlorine 
D) iodine 
E) astatine

Question 20

The correct name of H2CO3 is ________.

Accepted Answer

A) hydrogen carbide 
B) hydrogen carbonate ion 
C) carbonate ion 
D) carbonic acid 
E) carboxylic acid 
A) hydrogen carbide 
B) hydrogen carbonate ion 
C) carbonate ion 
D) carbonic acid 
E) carboxylic acid

Exam 22: Chemistry of the Nonmetals

Glass is ________ whereas quartz is ________.

How many oxygen atoms are bonded to each silicon atom in SiO2?

Which of the following is not an allotropic form of carbon?

Boron can violate the octet rule in its compounds in that ________.

Hydrogen can combine with ________ to form a metallic hydride.

The instability of xenon fluorides is due to its negative enthalpy of formation.

Of Li, K, P and Ne which is the least electronegative?

The reduction of metal oxides uses carbon monoxide.

The oxidation number of B in B2O3 is ________.

The dissolution of 1.0 mol of ________ to 1.0 L of water at 25 °C would yield the most acidic solution.

B2O3 is the anhydride of ________.

Which equation correctly represents the reaction between carbon dioxide and water?

Tetraboric acid, H2B4O7, is prepared by heating boric acid, H3BO3 (a condensation reaction involving water loss). If 400.0 mmol H3BO3 are used, what mass (g)of H2O is formed, assuming quantitative stoichiometric conversion?

What is meant by the term "composite"?

To produce carbon black, ________.

The oxidation state of silicon in SiO44- is ________.

The correct name for the BH4- ion is ________.

The oxidation state of oxygen in O2F2 is ________.

Which halogen can react with fluorine to form the compound XF7?

The correct name of H2CO3 is ________.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

Glass is whereas quartz is .

How many oxygen atoms are bonded to each silicon atom in SiO₂?

The oxidation number of B in B₂O₃ is ________.

B₂O₃ is the anhydride of ________.

Tetraboric acid, H₂B₄O₇, is prepared by heating boric acid, H₃BO₃ (a condensation reaction involving water loss). If 400.0 mmol H₃BO₃ are used, what mass (g)of H₂O is formed, assuming quantitative stoichiometric conversion?

The oxidation state of silicon in SiO₄^4- is ________.

The correct name for the BH₄^- ion is ________.

The oxidation state of oxygen in O₂F₂ is ________.

Which halogen can react with fluorine to form the compound XF₇?

The correct name of H₂CO₃ is ________.