Question 1

What is not generally considered to be a ceramic?

Accepted Answer

A)  indium,In
B)  silica,SiO2
C)  silicon nitride,Si3N4
D)  zirconia,ZiO2

Question 2

Use the picture below to answer the following questions. 4? A) diagram (1)  B) diagram (2)  C) diagram (3)  D) diagram (4) " class="answers-bank-image d-inline" rel="preload" >
-What diagram would describe the molecular orbital picture for the species Na4?

Accepted Answer

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

Question 3

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

Accepted Answer

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

Question 4

In order for a photovoltaic cell to convert light to electricity,the band gap must be less than or equal to the energy of the light absorbed.If light of 955 nm is to be absorbed,the band gap of the photovoltaic cell must be less than or equal to ________ kJ/mol.

Accepted Answer

The answer of In order for a photovoltaic cell to...

Question 5

What type of substances exhibit an increase in conductivity with an increase in temperature?

Accepted Answer

A)  both metals and semiconductors
B)  only insulators
C)  only metals
D)  only semiconductors

Question 6

What terminology best describes the bonding in the following schematic of a metal?

Accepted Answer

A)  ionic bonding
B)  covalent bonding
C)  electron-sea model
D)  crystal model

Question 7

Electrical resistance of a metal ________ with increasing temperature.

Accepted Answer

A)  can decrease or increase
B)  decreases
C)  does not change
D)  increases

Question 8

Al2O3 can be separated from iron oxide impurities in bauxite by dissolving the Al2O3 in hot aqueous NaOH.Give the formula of the aluminum complex ion that forms,and write a balanced net ionic equation for its formation by the reaction between Al2O3 and NaOH.

Accepted Answer

Al(OH)₄^-,Al₂O...

Question 9

What is not an appropriate method of isolating the metals shown?

Accepted Answer

A)  HgS(s) + O2(g) + heat → Hg(g) + SO2(g) 
B)  ZnO(s) + C(s) + heat → Zn(g) + CO(g) 
C)  WO3(s) + 3 H2(g) + heat → W(s) + 3 H2O(g) 
D)  Al2O3(s) + 2 Cr(s) + heat → Cr2O3(s) + 2 Al(l)

Question 10

What metal is isolated from the ore sphalerite?

Accepted Answer

A)  copper
B)  manganese
C)  titanium
D)  zinc

Question 11

How does one commercially reduce the metal oxides or chlorides of sodium and magnesium?

Accepted Answer

A)  electrolysis of the molten salts
B)  high temperature reduction with aluminum
C)  high temperature reduction with carbon
D)  roasting

Question 12

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

Accepted Answer

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

Question 13

Look at the location of elements A,B,C,and D in the following periodic table. 
-Which of these elements is likely to be found in nature as a carbonate?

Accepted Answer

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

Question 14

What is a cermet?

Accepted Answer

A)  boron nitride/epoxy
B)  ceramic-metal composite
C)  ceramic-polymer composite
D)  silicon carbide/graphite

Question 15

Which element is likely to be a principal impurity in zinc ore?

Accepted Answer

A)  cadmium
B)  copper
C)  gallium
D)  nickel

Question 16

Which one of the following is a metallic conductor at room temperature but a superconductor at 18 K?

Accepted Answer

A)  diamond
B)  graphite
C)  fullerene
D)  potassium fulleride

Question 17

What minerals are important commercial sources of metals?

Accepted Answer

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

Question 18

The following pictures show the electron populations of the composite s-d bands for four different transition metals. 
-Which metal has the highest melting point?

Accepted Answer

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

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)  manganese,MnO2
C)  tin,SnO2
D)  titanium,TiO2

Question 20

What is a principal commercial ore for the element aluminum?

Accepted Answer

A)  bauxite
B)  chalcopyrite
C)  chromite
D)  hematite

Exam 21: Metals and Solid-State Materials

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

Correct AnswerverifiedShow Answer

Look at the location of elements A,B,C,and D in the following periodic table. -Which of these elements is likely to be found in nature as a carbonate?

Correct AnswerverifiedShow Answer

What is a cermet?

Correct AnswerverifiedShow Answer

Which one of the following is a metallic conductor at room temperature but a superconductor at 18 K?

Correct AnswerverifiedShow Answer

The following pictures show the electron populations of the composite s-d bands for four different transition metals. -Which metal has the highest melting point?

Correct AnswerverifiedShow Answer

What type of substances exhibit an increase in conductivity with an increase in temperature?

Correct AnswerverifiedShow Answer

In order for a photovoltaic cell to convert light to electricity,the band gap must be less than or equal to the energy of the light absorbed.If light of 955 nm is to be absorbed,the band gap of the photovoltaic cell must be less than or equal to ________ kJ/mol.

Correct AnswerverifiedShow Answer

Electrical resistance of a metal ________ with increasing temperature.

Correct AnswerverifiedShow Answer

What is not an appropriate method of isolating the metals shown?

Correct AnswerverifiedShow Answer

What is not generally considered to be a ceramic?

Correct AnswerverifiedShow Answer

What minerals are important commercial sources of metals?

Correct AnswerverifiedShow Answer

Which element is likely to be a principal impurity in zinc ore?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Al2O3 can be separated from iron oxide impurities in bauxite by dissolving the Al2O3 in hot aqueous NaOH.Give the formula of the aluminum complex ion that forms,and write a balanced net ionic equation for its formation by the reaction between Al2O3 and NaOH.

Correct AnswerverifiedAl(OH)4-,Al2O...View AnswerShow Answer

What metal is isolated from the ore sphalerite?

Correct AnswerverifiedShow Answer

What is a principal commercial ore for the element aluminum?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What terminology best describes the bonding in the following schematic of a metal?

Correct AnswerverifiedShow Answer

Use the picture below to answer the following questions. -What diagram would describe the molecular orbital picture for the species Na4?

Correct AnswerverifiedShow Answer

How does one commercially reduce the metal oxides or chlorides of sodium and magnesium?

Correct AnswerverifiedShow Answer

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Al₂O₃ can be separated from iron oxide impurities in bauxite by dissolving the Al₂O₃ in hot aqueous NaOH.Give the formula of the aluminum complex ion that forms,and write a balanced net ionic equation for its formation by the reaction between Al₂O₃ and NaOH.

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Al(OH)₄^-,Al₂O...
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Use the picture below to answer the following questions. -What diagram would describe the molecular orbital picture for the species Na₄?

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