Question 1

Write a balanced chemical equation illustrating roasting.

Accepted Answer

2ZnS + 3O₂

Question 2

Which two compounds are produced by the Solvay process?

Accepted Answer

A)  CaCO3 and CaO
B)  CaCO3 and Na2CO3
C)  NaHCO3 and NaCl
D)  NH3 and NH4Cl
E)  NaHCO3 and Na2CO3F) B) and C)
G) A) and C)

Question 3

Which one of these metals would normally be obtained by chemical reduction?

Accepted Answer

A)  aluminum
B)  calcium
C)  lithium
D)  sodium
E)  vanadiumF) B) and E)
G) C) and D)

Question 4

The following reaction is used to produce chromium metal at high temperature.
Cr2O3(s)+ 2Al(s) $\to$  2Cr(l)+ Al2O3(s)
Which element is oxidized and which is reduced?

Accepted Answer

chromium is reduced ...

Question 5

Mercury, magnesium, and zinc have low enough boiling points that they can be purified by distillation.

Accepted Answer

A) True 
 B)False

Question 6

Aluminum hydroxide, Al(OH) 3, is

Accepted Answer

A)  an acid.
B)  an amphoteric hydroxide.
C)  a base.
D)  an explosive hydroxide.
E)  used to make amalgams.F) A) and E)
G) C) and D)

Question 7

Potassium superoxide, KO2(s), is used in the breathing systems of biohazard suits.Write separate chemical equations showing how KO2(s)reacts with moisture and carbon dioxide in exhaled air to generate oxygen gas.

Accepted Answer

2KO₂(s)+ 2H₂

Question 8

Write the chemical formula of halite.

Accepted Answer

The answer of Write the chemical formula of halite....

Question 9

Write the chemical formula of magnetite.

Accepted Answer

Fe<sub>3</sub>O<sub>...

Question 10

The following reaction is used to produce titanium metal at high temperature.
TiCl4(g)+ 2Mg(l)$\to$ Ti(s)+ 2MgCl2(l)
Which element is oxidized and which is reduced?

Accepted Answer

titanium is reduced ...

Question 11

Bauxite (Al2O3·2H2O)ore is the principal commercial source of aluminum metal.

Accepted Answer

A) True 
 B)False

Question 12

Write a balanced chemical equation illustrating chemical reduction.

Accepted Answer

Cr₂O₃ + ...

Question 13

Beryllium, the first element in Group 2A, is the most metallic element in the group.

Accepted Answer

A) True 
 B)False

Question 14

According to the band theory, a band is

Accepted Answer

A)  an elastic force that holds electrons close to atoms in an insulator.
B)  the energy gap associated with semiconductors.
C)  a large number of molecular orbitals that are close together in energy.
D)  a large number of atoms in a crystal.E) A) and B)
F) A) and C)

Question 15

Alloys of iron that contain 1.0-1.5% carbon and some manganese, phosphorus, silicon, and sulfur are called

Accepted Answer

A)  steel.
B)  cast iron.
C)  coke.
D)  pig iron.
E)  hematite.F) C) and D)
G) All of the above

Question 16

Metallic sodium is obtained commercially from molten sodium chloride by

Accepted Answer

A)  chemical reduction with magnesium.
B)  flotation.
C)  electrolysis.
D)  zone refining.
E)  roasting.F) All of the above
G) A) and B)

Question 17

In the production of potassium metal, the source of electrons in the reduction of K+ ions is

Accepted Answer

A)  H2(g) 
B)  Na(g) 
C)  CO(g) 
D)  CaO(s) 
E)  electrolysisF) C) and D)
G) All of the above

Question 18

Which choice gives two raw materials used in the Solvay process?

Accepted Answer

A)  NaHCO3 and NaCl
B)  CaCO3 and Na2CO3
C)  NaCl and NaCO3
D)  NH3 and NaCl
E)  Na2CO3 and NH4ClF) A) and B)
G) A) and E)

Exam 20: Metallurgy and the Chemistry of Metals

Which one of these metals would normally be obtained by chemical reduction?

Correct Answer
verified

Write the chemical formula of halite.

Correct Answer
verified

Which two compounds are produced by the Solvay process?

Correct Answer
verified

Metallic sodium is obtained commercially from molten sodium chloride by

Correct Answer
verified

The following reaction is used to produce titanium metal at high temperature. TiCl₄(g)+ 2Mg(l) $\to$ Ti(s)+ 2MgCl₂(l) Which element is oxidized and which is reduced?

Correct Answer
verified
titanium is reduced ...
View Answer

In the production of potassium metal, the source of electrons in the reduction of K⁺ ions is

Correct Answer
verified

Alloys of iron that contain 1.0-1.5% carbon and some manganese, phosphorus, silicon, and sulfur are called

Correct Answer
verified

According to the band theory, a band is

Correct Answer
verified

Bauxite (Al₂O₃·2H₂O)ore is the principal commercial source of aluminum metal.

Correct Answer
verified

Write a balanced chemical equation illustrating roasting.

Correct Answer
verified
2ZnS + 3O_{2View Answer}

Write a balanced chemical equation illustrating chemical reduction.

Correct Answer
verified
Cr₂O₃ + ...
View Answer

Aluminum hydroxide, Al(OH) ₃, is

Correct Answer
verified

Beryllium, the first element in Group 2A, is the most metallic element in the group.

Correct Answer
verified

The following reaction is used to produce chromium metal at high temperature. Cr₂O₃(s)+ 2Al(s) $\to$ 2Cr(l)+ Al₂O₃(s) Which element is oxidized and which is reduced?

Correct Answer
verified
chromium is reduced ...
View Answer

Write the chemical formula of magnetite.

Correct Answer
verified
Fe₃O_...
View Answer

Potassium superoxide, KO₂(s), is used in the breathing systems of biohazard suits.Write separate chemical equations showing how KO₂(s)reacts with moisture and carbon dioxide in exhaled air to generate oxygen gas.

Correct Answer
verified
2KO₂(s)+ 2H_{2View Answer}

Which choice gives two raw materials used in the Solvay process?

Correct Answer
verified

Mercury, magnesium, and zinc have low enough boiling points that they can be purified by distillation.

Correct Answer
verified

Exam 20: Metallurgy and the Chemistry of Metals

Which one of these metals would normally be obtained by chemical reduction?

Correct AnswerverifiedShow Answer

Write the chemical formula of halite.

Correct AnswerverifiedShow Answer

Which two compounds are produced by the Solvay process?

Correct AnswerverifiedShow Answer

Metallic sodium is obtained commercially from molten sodium chloride by

Correct AnswerverifiedShow Answer

The following reaction is used to produce titanium metal at high temperature. TiCl4(g)+ 2Mg(l) →\to→ Ti(s)+ 2MgCl2(l) Which element is oxidized and which is reduced?

Correct Answerverifiedtitanium is reduced ...View AnswerShow Answer

In the production of potassium metal, the source of electrons in the reduction of K+ ions is

Correct AnswerverifiedShow Answer

Alloys of iron that contain 1.0-1.5% carbon and some manganese, phosphorus, silicon, and sulfur are called

Correct AnswerverifiedShow Answer

According to the band theory, a band is

Correct AnswerverifiedShow Answer

Bauxite (Al2O3·2H2O)ore is the principal commercial source of aluminum metal.

Correct AnswerverifiedShow Answer

Write a balanced chemical equation illustrating roasting.

Correct Answerverified2ZnS + 3O2View AnswerShow Answer

Write a balanced chemical equation illustrating chemical reduction.

Correct AnswerverifiedCr2O3 + ...View AnswerShow Answer

Aluminum hydroxide, Al(OH) 3, is

Correct AnswerverifiedShow Answer

Beryllium, the first element in Group 2A, is the most metallic element in the group.

Correct AnswerverifiedShow Answer

The following reaction is used to produce chromium metal at high temperature. Cr2O3(s)+ 2Al(s) →\to→ 2Cr(l)+ Al2O3(s) Which element is oxidized and which is reduced?

Correct Answerverifiedchromium is reduced ...View AnswerShow Answer

Write the chemical formula of magnetite.

Correct AnswerverifiedFe3O...View AnswerShow Answer

Potassium superoxide, KO2(s), is used in the breathing systems of biohazard suits.Write separate chemical equations showing how KO2(s)reacts with moisture and carbon dioxide in exhaled air to generate oxygen gas.

Correct Answerverified2KO2(s)+ 2H2View AnswerShow Answer

Which choice gives two raw materials used in the Solvay process?

Correct AnswerverifiedShow Answer

Mercury, magnesium, and zinc have low enough boiling points that they can be purified by distillation.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The following reaction is used to produce titanium metal at high temperature. TiCl₄(g)+ 2Mg(l) $\to$ Ti(s)+ 2MgCl₂(l) Which element is oxidized and which is reduced?

Correct Answer
verified
titanium is reduced ...
View Answer

In the production of potassium metal, the source of electrons in the reduction of K⁺ ions is

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Bauxite (Al₂O₃·2H₂O)ore is the principal commercial source of aluminum metal.

Correct Answer
verified

Correct Answer
verified
2ZnS + 3O_{2View Answer}

Correct Answer
verified
Cr₂O₃ + ...
View Answer

Aluminum hydroxide, Al(OH) ₃, is

Correct Answer
verified

Correct Answer
verified

The following reaction is used to produce chromium metal at high temperature. Cr₂O₃(s)+ 2Al(s) $\to$ 2Cr(l)+ Al₂O₃(s) Which element is oxidized and which is reduced?

Correct Answer
verified
chromium is reduced ...
View Answer

Correct Answer
verified
Fe₃O_...
View Answer

Potassium superoxide, KO₂(s), is used in the breathing systems of biohazard suits.Write separate chemical equations showing how KO₂(s)reacts with moisture and carbon dioxide in exhaled air to generate oxygen gas.

Correct Answer
verified
2KO₂(s)+ 2H_{2View Answer}

Correct Answer
verified

Correct Answer
verified