Question 1

Which of the following is TRUE of powder metallurgy?

Accepted Answer

A)  Machining is required after forming the component. 
B)  There is more waste than with casting the molten metal. 
C)  Iron powder from mill scrap makes a denser component than iron particles formed through water atomization. 
D)  It is used to separate gangue from the rest of the metal ore. 
E)  It does not require the high temperatures that are involved in casting molten metal. 
A)  Machining is required after forming the component. 
B)  There is more waste than with casting the molten metal. 
C)  Iron powder from mill scrap makes a denser component than iron particles formed through water atomization. 
D)  It is used to separate gangue from the rest of the metal ore. 
E)  It does not require the high temperatures that are involved in casting molten metal.

Question 2

Identify the ferromagnetic elements.

Accepted Answer

A)  cobalt 
B)  iron 
C)  nickel 
D)  all of the above 
E)  none of the above 
A)  cobalt 
B)  iron 
C)  nickel 
D)  all of the above 
E)  none of the above

Question 3

Match between columns
                        Premises: Mn
Zn
Cu
Ti
Hg
V
Pb

Accepted Answer

The Answer of galena and sphalerite and rhodochrosite and malachite is...

Question 4

An interstitial alloy contains hydrogen in half of the tetrahedral holes of a closest packed metal,M.What is the formula of this alloy?

Accepted Answer

A)  MH 
B)  MH4 
C)  MH2 
D)  M2H 
E)  M4H 
A)  MH 
B)  MH4 
C)  MH2 
D)  M2H 
E)  M4H

Question 5

An interstitial alloy contains carbon in one-fourth of the octahedral holes of a closest packed metal,M.What is the formula of this alloy?

Accepted Answer

A)  M4C 
B)  MC4 
C)  MC 
D)  M2C 
E)  MC2 
A)  M4C 
B)  MC4 
C)  MC 
D)  M2C 
E)  MC2

Question 6

________ is a soft-white metal that has been found as a contaminant in crude oil.

Accepted Answer

A)  Vanadium 
B)  Gold 
C)  Silver 
D)  Mercury 
E)  Copper 
A)  Vanadium 
B)  Gold 
C)  Silver 
D)  Mercury 
E)  Copper

Question 7

What is the difference between ferromagnetism and paramagnetism?

Accepted Answer

When a substance is paramagnetic,it cont

Question 8

Hydrometallurgy is

Accepted Answer

A)  refining of metal ores using oxidation reactions. 
B)  refining of metal ores using cold. 
C)  refining of metal ores using reactions with aqueous solutions. 
D)  forming metal parts using heat and large crystals of metal. 
E)  forming tiny metal crystals using acid and water spray. 
A)  refining of metal ores using oxidation reactions. 
B)  refining of metal ores using cold. 
C)  refining of metal ores using reactions with aqueous solutions. 
D)  forming metal parts using heat and large crystals of metal. 
E)  forming tiny metal crystals using acid and water spray.

Question 9

Which substance is the best conductor of electricity?

Accepted Answer

A)  astatine 
B)  diamond 
C)  tungsten 
D)  xenon 
A)  astatine 
B)  diamond 
C)  tungsten 
D)  xenon

Question 10

Write a balanced equation for the calcination of NiCO3.

Accepted Answer

A)  NiCO3(s) + CaO(s)   NiO(s) + CaCO3(s) 
B)  NiCO3(s)   NiO(s) + CO2(g) 
C)  NiCO3(s) + C(s)   NiO(s) + 2 CO(g) 
D)  NiCO3(s) + SiO2(s)   NiSiO3(s) + CO2(g) 
E)  None of the above represents calcination. 
A)  NiCO3(s) + CaO(s)   NiO(s) + CaCO3(s) 
B)  NiCO3(s)   NiO(s) + CO2(g) 
C)  NiCO3(s) + C(s)   NiO(s) + 2 CO(g) 
D)  NiCO3(s) + SiO2(s)   NiSiO3(s) + CO2(g) 
E)  None of the above represents calcination.

Question 11

Which of the following is TRUE concerning interstitial alloys?

Accepted Answer

A)  The metal takes on the properties of the foreign atoms once they are present. 
B)  Small atoms fit in between the metal atoms in the crystal structure. 
C)  Brass is an example of an interstitial alloy. 
D)  The foreign atoms present weaken the metallic structure. 
E)  None of the above is true. 
A)  The metal takes on the properties of the foreign atoms once they are present. 
B)  Small atoms fit in between the metal atoms in the crystal structure. 
C)  Brass is an example of an interstitial alloy. 
D)  The foreign atoms present weaken the metallic structure. 
E)  None of the above is true.

Question 12

Which of the following is an example of smelting?

Accepted Answer

A)  2 PbS(s) + 3 O2(g)   2 PbO(s) + 2 SO2(g) 
B)  4 PbCO3(s) + O2(g)   2 Pb2O3(s) + 4 CO2(g) 
C)  PbCO3(s) + SiO2(s)   PbSiO3(l) + CO2(g) 
D)  PbCO3(s)   PbO(s) + CO2(g) 
E)  ZnO(s) + CO(g)   Zn(l) + CO2(g) 
A)  2 PbS(s) + 3 O2(g)   2 PbO(s) + 2 SO2(g) 
B)  4 PbCO3(s) + O2(g)   2 Pb2O3(s) + 4 CO2(g) 
C)  PbCO3(s) + SiO2(s)   PbSiO3(l) + CO2(g) 
D)  PbCO3(s)   PbO(s) + CO2(g) 
E)  ZnO(s) + CO(g)   Zn(l) + CO2(g)

Question 13

Electrometallurgy is

Accepted Answer

A)  refining of metal ores using heat. 
B)  forming metal parts using electricity. 
C)  forming metal parts using heat and small crystals of metal. 
D)  refining of metal ores using oxidation/reduction reactions. 
E)  refining of metal ores using reactions with basic solutions. 
A)  refining of metal ores using heat. 
B)  forming metal parts using electricity. 
C)  forming metal parts using heat and small crystals of metal. 
D)  refining of metal ores using oxidation/reduction reactions. 
E)  refining of metal ores using reactions with basic solutions.

Question 14

Calcination is

Accepted Answer

A)  heating an ore, in the presence of hydrogen or another substance, in order to cause a chemical reaction that drives off newly formed volatile compounds. 
B)  heating an ore, in the presence of helium or another substance, in order to purify the ore and obtain the liquid metal. 
C)  selectively dissolving a metal in solution to separate it from its ore. 
D)  the process of heating an ore to drive off volatile compounds. 
E)  forming metal parts using steam and large crystals of metal. 
A)  heating an ore, in the presence of hydrogen or another substance, in order to cause a chemical reaction that drives off newly formed volatile compounds. 
B)  heating an ore, in the presence of helium or another substance, in order to purify the ore and obtain the liquid metal. 
C)  selectively dissolving a metal in solution to separate it from its ore. 
D)  the process of heating an ore to drive off volatile compounds. 
E)  forming metal parts using steam and large crystals of metal.

Question 15

Leaching is

Accepted Answer

A)  melting an ore and separating it from the lower density gangue. 
B)  selectively dissolving a metal in solution to separate it from its ore. 
C)  the process of heating an ore to drive off volatile compounds. 
D)  heating an ore, in the presence of argon or another substance, in order to purify the ore and obtain the liquid metal. 
E)  heating an ore, in the presence of argon or another substance, in order to cause a chemical reaction that drives off newly formed volatile compounds. 
A)  melting an ore and separating it from the lower density gangue. 
B)  selectively dissolving a metal in solution to separate it from its ore. 
C)  the process of heating an ore to drive off volatile compounds. 
D)  heating an ore, in the presence of argon or another substance, in order to purify the ore and obtain the liquid metal. 
E)  heating an ore, in the presence of argon or another substance, in order to cause a chemical reaction that drives off newly formed volatile compounds.

Question 16

Give the components of brass.

Accepted Answer

A)  copper and tin 
B)  lead and tin 
C)  nickel and gold 
D)  copper and zinc 
E)  zinc and lead 
A)  copper and tin 
B)  lead and tin 
C)  nickel and gold 
D)  copper and zinc 
E)  zinc and lead

Question 17

Chromates are strong

Accepted Answer

A)  oxidizers. 
B)  bases. 
C)  acids. 
D)  metals. 
E)  reducers. 
A)  oxidizers. 
B)  bases. 
C)  acids. 
D)  metals. 
E)  reducers.

Question 18

In a substitutional alloy,

Accepted Answer

A)  one nonmetal substitutes for another nonmetal in a crystal structure. 
B)  small, usually nonmetallic atoms fit in between the metallic atoms of a crystal. 
C)  small metallic atoms fit in between the nonmetallic atoms of a crystal 
D)  one metal substitutes for another metal in a crystal structure. 
E)  one metal substitutes for a nonmetal in a crystal structure. 
A)  one nonmetal substitutes for another nonmetal in a crystal structure. 
B)  small, usually nonmetallic atoms fit in between the metallic atoms of a crystal. 
C)  small metallic atoms fit in between the nonmetallic atoms of a crystal 
D)  one metal substitutes for another metal in a crystal structure. 
E)  one metal substitutes for a nonmetal in a crystal structure.

Question 19

Identify the normal crystal structure at room temperature for Cr.

Accepted Answer

A)  body-centered cubic 
B)  trigonal pyramidal 
C)  octahedral 
D)  hexagonal 
E)  hexagonal closest packed 
A)  body-centered cubic 
B)  trigonal pyramidal 
C)  octahedral 
D)  hexagonal 
E)  hexagonal closest packed

Question 20

Why is zinc used to coat steel objects?

Accepted Answer

Zinc is a stronger reducing ag

Exam 24: Metals and Metallurgy

Which of the following is TRUE of powder metallurgy?

Identify the ferromagnetic elements.

An interstitial alloy contains hydrogen in half of the tetrahedral holes of a closest packed metal,M.What is the formula of this alloy?

An interstitial alloy contains carbon in one-fourth of the octahedral holes of a closest packed metal,M.What is the formula of this alloy?

________ is a soft-white metal that has been found as a contaminant in crude oil.

What is the difference between ferromagnetism and paramagnetism?

Hydrometallurgy is

Which substance is the best conductor of electricity?

Write a balanced equation for the calcination of NiCO3.

Which of the following is TRUE concerning interstitial alloys?

Which of the following is an example of smelting?

Electrometallurgy is

Calcination is

Leaching is

Give the components of brass.

Chromates are strong

In a substitutional alloy,

Identify the normal crystal structure at room temperature for Cr.

Why is zinc used to coat steel objects?

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Compounds

Filters

Write a balanced equation for the calcination of NiCO₃.