Question 1

What is the oxidation number of mercury in cinnabar?

Accepted Answer

The answer of What is the oxidation number of mercury...

Question 2

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

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 3

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 4

How would one classify copper mixed with tin?

Accepted Answer

A) conductor 
B) n-type semiconductor 
C) p-type semiconductor 
D) insulator 
A) conductor 
B) n-type semiconductor 
C) p-type semiconductor 
D) insulator

Question 5

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 6

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

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 7

Tin exists in two forms: gray tin and white tin.The electrical conductivity of gray tin increases with an increase in temperature,whereas the electrical conductivity of white tin decreases with an increase in temperature.The form of tin that is a semiconductor is ________ tin.

Accepted Answer

The answer of Tin exists in two forms: gray tin...

Question 8

What is not generally considered to be a ceramic?

Accepted Answer

A) silicon,Si 
B) zirconia,ZiO2 
C) silicon carbide,SiC 
D) silicon nitride,Si3N4 
A) silicon,Si 
B) zirconia,ZiO2 
C) silicon carbide,SiC 
D) silicon nitride,Si3N4

Question 9

Which element has the smallest energy band gap?

Accepted Answer

A) I 
B) Se 
C) Sn 
D) Te 
A) I 
B) Se 
C) Sn 
D) Te

Question 10

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

Accepted Answer

A) materials (1)and (2) 
B) materials (1)and (4) 
C) materials (2)and (3) 
D) materials (3)and (4) 
A) materials (1)and (2) 
B) materials (1)and (4) 
C) materials (2)and (3) 
D) materials (3)and (4)

Question 11

Why are ceramics superior to metals as structural materials?

Accepted Answer

A) Ceramics are easier to fabricate into shapes than metals. 
B) Ceramics are more malleable than metals. 
C) Ceramics are more resistant to wear and corrosion than metals. 
D) Ceramics have greater impact resistance than metals. 
A) Ceramics are easier to fabricate into shapes than metals. 
B) Ceramics are more malleable than metals. 
C) Ceramics are more resistant to wear and corrosion than metals. 
D) Ceramics have greater impact resistance than metals.

Question 12

Which combination of semiconductors can be employed to make a diode?

Accepted Answer

A) GaAs doped with Ge and GaP doped with Si 
B) GaAs doped with Se and GaP doped with Zn 
C) Si doped with B and Ge doped with Ga 
D) Si doped with P and Ge doped with As 
A) GaAs doped with Ge and GaP doped with Si 
B) GaAs doped with Se and GaP doped with Zn 
C) Si doped with B and Ge doped with Ga 
D) Si doped with P and Ge doped with As

Question 13

Why is CaCO3 added to a blast furnace in the steel making process?

Accepted Answer

A) to give a source of CO2 
B) to remove basic oxides from the iron ore 
C) to remove silicates and phosphates from the iron ore 
D) to remove unreactive carbon from the iron ore 
A) to give a source of CO2 
B) to remove basic oxides from the iron ore 
C) to remove silicates and phosphates from the iron ore 
D) to remove unreactive carbon from the iron ore

Question 14

What is the most important copper containing ore?

Accepted Answer

A) bauxite 
B) chalcopyrite 
C) pyrolusite 
D) ilmenite 
A) bauxite 
B) chalcopyrite 
C) pyrolusite 
D) ilmenite

Question 15

The reaction,MnO (s)+ SiO2 (s)→ MnSiO3 (l)can be considered as an acid base reaction.Which of the following statements best explains why?

Accepted Answer

A) MnO is a proton donor. 
B) SiO2 is a proton acceptor. 
C) MnO is an electron donor. 
D) SiO2 is an electron donor. 
A) MnO is a proton donor. 
B) SiO2 is a proton acceptor. 
C) MnO is an electron donor. 
D) SiO2 is an electron donor.

Question 16

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

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 17

What is the chemical process most likely to be used to purify nickel metal?

Accepted Answer

A) distillation 
B) electrorefining 
C) reaction with carbon monoxide (a Mond process) 
D) reaction with iodine 
A) distillation 
B) electrorefining 
C) reaction with carbon monoxide (a Mond process) 
D) reaction with iodine

Question 18

Addition of a small amount of As impurity in silicon results in a(n)________-type semiconductor that has a conductivity that is ________ (greater,less)than silicon.

Accepted Answer

The answer of Addition of a small amount of As...

Question 19

What metal is isolated from the ore rutile and what is the chemical formula of rutile?

Accepted Answer

A) aluminum,Al2O3 ∙ xH2O 
B) cassiterite,SnO2 
C) cinnabar,HgS  
D) titanium,TiO2 
A) aluminum,Al2O3 ∙ xH2O 
B) cassiterite,SnO2 
C) cinnabar,HgS  
D) titanium,TiO2

Question 20

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

Exam 21: Metals and Solid-State Materials

What is the oxidation number of mercury in cinnabar?

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

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?

How would one classify copper mixed with tin?

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?

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

Tin exists in two forms: gray tin and white tin.The electrical conductivity of gray tin increases with an increase in temperature,whereas the electrical conductivity of white tin decreases with an increase in temperature.The form of tin that is a semiconductor is ________ tin.

What is not generally considered to be a ceramic?

Which element has the smallest energy band gap?

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

Why are ceramics superior to metals as structural materials?

Which combination of semiconductors can be employed to make a diode?

Why is CaCO3 added to a blast furnace in the steel making process?

What is the most important copper containing ore?

The reaction,MnO (s)+ SiO2 (s)→ MnSiO3 (l)can be considered as an acid base reaction.Which of the following statements best explains why?

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

What is the chemical process most likely to be used to purify nickel metal?

Addition of a small amount of As impurity in silicon results in a(n)________-type semiconductor that has a conductivity that is ________ (greater,less)than silicon.

What metal is isolated from the ore rutile and what is the chemical formula of rutile?

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?

Chemical Tools: Experimentation and Measurement

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Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories 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

Nuclear Chemistry

Transition Elements and Coordination Chemistry

The Main-Group Elements

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Filters

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 CaCO₃ added to a blast furnace in the steel making process?

The reaction,MnO (s)+ SiO₂ (s)→ MnSiO₃ (l)can be considered as an acid base reaction.Which of the following statements best explains why?

Addition of a small amount of As impurity in silicon results in a(n)-type semiconductor that has a conductivity that is (greater,less)than silicon.

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?