Question 1

Which element has the largest energy band gap?

Accepted Answer

A) C (diamond) 
B) Si 
C) Ge 
D) Sn (white) 
A) C (diamond) 
B) Si 
C) Ge 
D) Sn (white)

Question 2

What is the sol-gel process?

Accepted Answer

A) a series of chemical steps that involves the isolation of CuS and then roasting with oxygen 
B) a series of chemical steps that involves the isolation of SO3 and then treatment with H2SO4 
C) a series of chemical steps that involves the synthesis of a metal oxide powder from a metal alkoxide 
D) a series of chemical steps that involves the thermal decomposition of fibers of polyacrylonitrile 
A) a series of chemical steps that involves the isolation of CuS and then roasting with oxygen 
B) a series of chemical steps that involves the isolation of SO3 and then treatment with H2SO4 
C) a series of chemical steps that involves the synthesis of a metal oxide powder from a metal alkoxide 
D) a series of chemical steps that involves the thermal decomposition of fibers of polyacrylonitrile

Question 3

The following pictures show the electron populations of the composite s-d bands for Sc,Ti,V,and Zn.  
-Which picture corresponds to Sc?

Accepted Answer

A) picture (1) 
B) picture (2) 
C) picture (3) 
D) picture (4) 
A) picture (1) 
B) picture (2) 
C) picture (3) 
D) picture (4)

Question 4

What is the coordination number of Si in SiC that has a diamond-like structure?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 6 
A) 1 
B) 2 
C) 4 
D) 6

Question 5

Because nanoparticles have a larger percentage of atoms on the surface of the nanoparticle than on the surface of bulk material,nanoparticles have ________ melting points and ________ chemical reactivity than the bulk material.

Accepted Answer

The answer of Because nanoparticles have a larger percentage of...

Question 6

What is not a major component of slag?

Accepted Answer

A) CaSiO3 
B) Ca3(PO4)2 
C) Fe2O3 
D) MnSiO3 
A) CaSiO3 
B) Ca3(PO4)2 
C) Fe2O3 
D) MnSiO3

Question 7

Light emitting diodes (LEDs)used in automobile brake lights illuminate 200 milliseconds faster than conventional incandescent brake lights.The faster illumination gives the driver of a trailing car an additional stopping distance of ________ feet at 55 mph.

Accepted Answer

The answer of Light emitting diodes (LEDs)used in automobile brake...

Question 8

What is the name of the process commonly associated with the isolation and concentration of Al2O3 from the ore bauxite (Al2O3 ∙ xH2O)?

Accepted Answer

A) basic oxygen process 
B) bayer process 
C) contact process 
D) mond process 
A) basic oxygen process 
B) bayer process 
C) contact process 
D) mond process

Question 9

The following pictures show the electron populations of the composite s - d bands for Y,Mo,Ag,and Cd.  
-Which picture corresponds to Y?

Accepted Answer

A) picture (1) 
B) picture (2) 
C) picture (3) 
D) picture (4) 
A) picture (1) 
B) picture (2) 
C) picture (3) 
D) picture (4)

Question 10

A diode has a positive bias when the p-type semiconductor is attached to the ________ (negative,positive)battery terminal,which ________ (inhibits,permits)electron flow.

Accepted Answer

The answer of A diode has a positive bias when...

Question 11

Look at the location of elements A,B,C,and D in the following periodic table.  
-Which of these elements is likely to be extracted from its ore by chemical reduction of a metal oxide?

Accepted Answer

A) element A 
B) element B 
C) element C 
D) element D 
A) element A 
B) element B 
C) element C 
D) element D

Question 12

Look at the location of elements A,B,C,and D in the following periodic table.  
-Which of these elements is likely to be extracted from its ore by electrolysis?

Accepted Answer

A) element A 
B) element B 
C) element C 
D) element D 
A) element A 
B) element B 
C) element C 
D) element D

Question 13

The following pictures show the electron population of the bands of MO energy levels for four different materials.  
-Which of these materials is a metal?

Accepted Answer

A) material (1) 
B) material (2) 
C) material (3) 
D) material (4) 
A) material (1) 
B) material (2) 
C) material (3) 
D) material (4)

Question 14

Limnite is an ore having a formula that is sometimes written as an iron(III)oxide hydrate,Fe2O3·xH2O.If 1.00 kg of limnite produces 0.747 kg of anhydrous Fe2O3 upon heating,what is the number of waters of hydration x in the Fe2O3·xH2O?

Accepted Answer

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

Question 15

The number of electrons that half fill a composite s-d band is ________.

Accepted Answer

The answer of The number of electrons that half fill...

Question 16

What are the most abundant minerals in the earth's crust?

Accepted Answer

A) aluminosilicates and silicates 
B) chlorides and iodides 
C) nitrates and phosphates 
D) oxides and sulfides 
A) aluminosilicates and silicates 
B) chlorides and iodides 
C) nitrates and phosphates 
D) oxides and sulfides

Question 17

Vanadium ore contains two isotopes of vanadium,50V and 51V.The least abundant isotope is radioactive and undergoes beta capture.What is the product of the beta decay?

Accepted Answer

A) (50Cr) 
B) (51Cr) 
C) (50Ti) 
D) (51Ti) 
A) (50Cr) 
B) (51Cr) 
C) (50Ti) 
D) (51Ti)

Question 18

Why is silicon dioxide added to molten iron in the basic oxygen process?

Accepted Answer

A) to remove acidic oxides from the molten iron 
B) to remove manganese oxide from the molten iron 
C) to remove phosphates and carbonates from the molten iron 
D) to remove trace amounts of carbon from the molten iron 
A) to remove acidic oxides from the molten iron 
B) to remove manganese oxide from the molten iron 
C) to remove phosphates and carbonates from the molten iron 
D) to remove trace amounts of carbon from the molten iron

Question 19

Which process is used in the fabrication of ceramics?

Accepted Answer

A) electrolysis 
B) reduction 
C) roasting 
D) sintering 
A) electrolysis 
B) reduction 
C) roasting 
D) sintering

Question 20

Which schematic best represents the electrical resistance versus temperature curve for a superconductor?

Accepted Answer

A) A 
B) B 
C) C 
D) none of these 
A) A 
B) B 
C) C 
D) none of these

Exam 21: Metals and Solid-State Materials

Which element has the largest energy band gap?

What is the sol-gel process?

The following pictures show the electron populations of the composite s-d bands for Sc,Ti,V,and Zn. -Which picture corresponds to Sc?

What is the coordination number of Si in SiC that has a diamond-like structure?

Because nanoparticles have a larger percentage of atoms on the surface of the nanoparticle than on the surface of bulk material,nanoparticles have ________ melting points and ________ chemical reactivity than the bulk material.

What is not a major component of slag?

Light emitting diodes (LEDs)used in automobile brake lights illuminate 200 milliseconds faster than conventional incandescent brake lights.The faster illumination gives the driver of a trailing car an additional stopping distance of ________ feet at 55 mph.

What is the name of the process commonly associated with the isolation and concentration of Al2O3 from the ore bauxite (Al2O3 ∙ xH2O)?

The following pictures show the electron populations of the composite s - d bands for Y,Mo,Ag,and Cd. -Which picture corresponds to Y?

A diode has a positive bias when the p-type semiconductor is attached to the ________ (negative,positive)battery terminal,which ________ (inhibits,permits)electron flow.

Look at the location of elements A,B,C,and D in the following periodic table. -Which of these elements is likely to be extracted from its ore by chemical reduction of a metal oxide?

Look at the location of elements A,B,C,and D in the following periodic table. -Which of these elements is likely to be extracted from its ore by electrolysis?

The following pictures show the electron population of the bands of MO energy levels for four different materials. -Which of these materials is a metal?

Limnite is an ore having a formula that is sometimes written as an iron(III)oxide hydrate,Fe2O3·xH2O.If 1.00 kg of limnite produces 0.747 kg of anhydrous Fe2O3 upon heating,what is the number of waters of hydration x in the Fe2O3·xH2O?

The number of electrons that half fill a composite s-d band is ________.

What are the most abundant minerals in the earth's crust?

Vanadium ore contains two isotopes of vanadium,50V and 51V.The least abundant isotope is radioactive and undergoes beta capture.What is the product of the beta decay?

Why is silicon dioxide added to molten iron in the basic oxygen process?

Which process is used in the fabrication of ceramics?

Which schematic best represents the electrical resistance versus temperature curve for a superconductor?

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Nuclear Chemistry

Organic and Biological Chemistry

Filters

Because nanoparticles have a larger percentage of atoms on the surface of the nanoparticle than on the surface of bulk material,nanoparticles have melting points and chemical reactivity than the bulk material.

What is the name of the process commonly associated with the isolation and concentration of Al₂O₃ from the ore bauxite (Al₂O₃ ∙ xH₂O)?

A diode has a positive bias when the p-type semiconductor is attached to the (negative,positive)battery terminal,which (inhibits,permits)electron flow.

Limnite is an ore having a formula that is sometimes written as an iron(III)oxide hydrate,Fe₂O₃·xH₂O.If 1.00 kg of limnite produces 0.747 kg of anhydrous Fe₂O₃ upon heating,what is the number of waters of hydration x in the Fe₂O₃·xH₂O?

Vanadium ore contains two isotopes of vanadium,⁵⁰V and ⁵¹V.The least abundant isotope is radioactive and undergoes beta capture.What is the product of the beta decay?