Question 1

The most common source for commercial production of sodium is called

Accepted Answer

A)  sodalite.
B)  limestone.
C)  halite.
D)  galena.
E)  pyrite.F) D) and E)
G) A) and C)

Question 2

The chlor-alkali process produces chlorine, Cl2(g) , in large quantities. What other industrially important substances are produced in this process?

Accepted Answer

A)  Na( s) , H 2( g) 
B)  H 2( g) , O 2( g) 
C)  Hg( l) , NaCl( s) 
D)  Na( s) , O 2( g) 
E)  NaOH( aq) , H 2( g) F) C) and D)
G) A) and D)

Question 3

What are the main mineral sources of phosphorus?

Accepted Answer

A)  Phosphides
B)  Phosphites
C)  Phosphors
D)  Phosphates
E)  Elemental phosphorusF) C) and D)
G) A) and E)

Question 4

The Downs cell is used in the production of

Accepted Answer

A)  copper.
B)  hydrogen.
C)  iron.
D)  magnesium.
E)  sodium.F) B) and D)
G) A) and B)

Question 5

What elements are alloyed to make stainless steel?

Accepted Answer

A)  Fe and C
B)  Fe and Mn
C)  Fe and Ni
D)  Cr and C
E)  Fe, Cr, and NiF) A) and E)
G) B) and E)

Question 6

Sulfur trioxide is the anhydride of sulfuric acid. However, SO3 is not added directly to water during the synthesis of sulfuric acid because

Accepted Answer

A)  hydration of SO 3 is very exothermic and difficult to control.
B)  hydration of SO 3 is very endothermic and proceeds too slowly to be profitable.
C)  at high temperatures water vapor catalyzes polymerization of SO 3.
D)  vapor phase sulfuric acid is corrosive and limits the useful life of the reactor.
E)  the water would decompose under such conditions.F) A) and B)
G) D) and E)

Question 7

Hydrogen displays the largest kinetic isotope effect of all the elements.

Accepted Answer

A) True 
 B)False

Question 8

The process that selectively extracts a metal from its ore, by dissolving it, is called

Accepted Answer

A)  roasting.
B)  leaching.
C)  smelting.
D)  flotation.
E)  hydration.F) A) and B)
G) D) and E)

Question 9

The industrial production of ammonia from nitrogen and hydrogen accounts for a greater amount of nitrogen fixation than either the atmospheric or the biological pathways.

Accepted Answer

A) True 
 B)False

Question 10

Cryolite, Na3AlF6, is used in the electrolysis of aluminum oxide because

Accepted Answer

A)  it is a good source of fluoride ions.
B)  it reduces the energy requirement of the process, due to its low melting point.
C)  it provides a source of fluorine, an oxidizing agent.
D)  it provides a source of sodium, a reducing agent.
E)  it is very soluble in water.F) C) and D)
G) A) and B)

Question 11

Carbon atoms in the carbon cycle spend most of their time in the oceans.

Accepted Answer

A) True 
 B)False

Question 12

The Hall-Heroult process refers to

Accepted Answer

A)  the production of aluminum by electrolysis.
B)  the recovery of sulfur from underground deposits.
C)  the manufacture of sulfuric acid.
D)  the production of ammonia from nitrogen and hydrogen gases.
E)  the isolation of Al 2O 3 from bauxite.F) C) and D)
G) A) and E)

Question 13

Plants extract phosphate from the soil

Accepted Answer

A)  by converting it to the dihydrogen phosphate ion by addition of acid to the soil near roots.
B)  by converting it to phosphoric acid.
C)  by osmosis.
D)  by leaching.
E)  by fixation.F) B) and C)
G) A) and E)

Question 14

The process in which a gaseous substance is converted into a condensed, more usable chemical substance is called

Accepted Answer

A)  differentiation.
B)  liquefaction.
C)  fixation.
D)  deposition.
E)  remediation.F) A) and B)
G) A) and E)

Question 15

Sulfide ores are frequently treated by flotation in order to concentrate them.

Accepted Answer

A) True 
 B)False

Question 16

The most abundant element in the Earth's crust is

Accepted Answer

A)  H
B)  Fe
C)  Al
D)  Si
E)  OF) None of the above
G) A) and D)

Question 17

Electrolysis is used as the last step in isolating pure

Accepted Answer

A)  iron.
B)  boron.
C)  aluminum.
D)  selenium.
E)  carbon.F) None of the above
G) B) and C)

Question 18

The main effect of the biosphere on the chemistry of the Earth's crust has been to

Accepted Answer

A)  create a reducing atmosphere.
B)  create an oxidizing atmosphere.
C)  increase the relative humidity.
D)  decrease the relative humidity.
E)  increase the level of atmospheric carbon dioxide.F) B) and D)
G) A) and C)

Question 19

Pyrometallurgy uses __________ to separate a metal from its ore.

Accepted Answer

A)  solid phase chemical properties
B)  electrical processes
C)  thermal processes
D)  aqueous chemical processes
E)  explosivesF) C) and E)
G) A) and E)

Question 20

The most common source for commercial production of aluminum is called

Accepted Answer

A)  aluminite.
B)  hematite.
C)  galena.
D)  cinnabar.
E)  bauxite.F) None of the above
G) A) and B)

Exam 22: The Elements in Nature and Industry

Sulfur trioxide is the anhydride of sulfuric acid. However, SO3 is not added directly to water during the synthesis of sulfuric acid because

Correct AnswerverifiedShow Answer

The Hall-Heroult process refers to

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Electrolysis is used as the last step in isolating pure

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The most abundant element in the Earth's crust is

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What elements are alloyed to make stainless steel?

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Cryolite, Na3AlF6, is used in the electrolysis of aluminum oxide because

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Sulfide ores are frequently treated by flotation in order to concentrate them.

Correct AnswerverifiedShow Answer

The most common source for commercial production of aluminum is called

Correct AnswerverifiedShow Answer

The process in which a gaseous substance is converted into a condensed, more usable chemical substance is called

Correct AnswerverifiedShow Answer

The Downs cell is used in the production of

Correct AnswerverifiedShow Answer

Plants extract phosphate from the soil

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What are the main mineral sources of phosphorus?

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Carbon atoms in the carbon cycle spend most of their time in the oceans.

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The most common source for commercial production of sodium is called

Correct AnswerverifiedShow Answer

The main effect of the biosphere on the chemistry of the Earth's crust has been to

Correct AnswerverifiedShow Answer

The industrial production of ammonia from nitrogen and hydrogen accounts for a greater amount of nitrogen fixation than either the atmospheric or the biological pathways.

Correct AnswerverifiedShow Answer

Pyrometallurgy uses __________ to separate a metal from its ore.

Correct AnswerverifiedShow Answer

The process that selectively extracts a metal from its ore, by dissolving it, is called

Correct AnswerverifiedShow Answer

Hydrogen displays the largest kinetic isotope effect of all the elements.

Correct AnswerverifiedShow Answer

The chlor-alkali process produces chlorine, Cl2(g) , in large quantities. What other industrially important substances are produced in this process?

Correct AnswerverifiedShow Answer

Sulfur trioxide is the anhydride of sulfuric acid. However, SO₃is not added directly to water during the synthesis of sulfuric acid because

Correct Answer
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Cryolite, Na₃AlF₆, is used in the electrolysis of aluminum oxide because

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The chlor-alkali process produces chlorine, Cl₂(g) , in large quantities. What other industrially important substances are produced in this process?

Correct Answer
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