Question 1

Which of these reactions is an example of nitrogen fixation

Accepted Answer

A)  2N2O  →\rarr→  2N2 + O2
B)  NH3 + H2O  →\rarr→  NH4+ + OH-
C)  N2 + O2  →\rarr→  2NO
D)  2NO2 + H2O  →\rarr→  HNO2 + HNO3
E)  2NO + O2  →\rarr→  2NO2 F) B) and E)
G) A) and D)

Question 2

The main commercial source of bromine is

Accepted Answer

A)   silver bromide ore.
B)   seawater.
C)   the Frasch process.
D)   phosphate rock.
E)   the Ostwald process.F) A) and D)
G) A) and B)

Question 3

The term catenation describes the

Accepted Answer

A)   tendency of carbon atoms to form cations in the presence of alkali metals.
B)   process of creating synthetic gas from coal.
C)   extraction of precious metals with sodium or potassium cyanide.
D)   ability of carbon atoms to form long chains and rings.
E)   interaction of Group 4A elements with Group 8A elements at high pressures and temperatures to form coordination compounds.F) A) and C)
G) C) and D)

Question 4

The chemistry of fluorine differs in many ways from that of the rest of the halogens.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following substances is a superoxide

Accepted Answer

A)   KO2
B)   Na2O2
C)   CO2
D)   CaO
E)   Al2O3F) A) and D)
G) A) and C)

Question 6

Alkali metal hydrides are very reactive with water, forming H2 gas.

Accepted Answer

A) True 
 B)False

Question 7

Which of these substances is the active ingredient in ordinary household bleach

Accepted Answer

A)   HCl
B)   Cl2
C)   NaCl
D)   NaClO
E)   NaClO4F) A) and B)
G) A) and C)

Question 8

Determine all of the covalent hydrides from the compounds listed below.
I. CaH2 
II. H2S 
III. SiH4

Accepted Answer

A)   I only
B)   II only
C)   I and II
D)   I and III
E)   II and IIIF) A) and E)
G) A) and B)

Question 9

When phosphate rock, Ca3(PO4) 2(s) , is converted to phosphorus,

Accepted Answer

A)   one of the products of the reaction is water.
B)   sulfuric acid is added to generate insoluble calcium sulfate.
C)   hydrogen is used to reduce the phosphate to phosphorus.
D)   silica is added to form a calcium silicate slag.
E)   oxygen must be added to prevent reaction of P4.F) C) and D)
G) All of the above

Question 10

Which of the following will oxidize gold

Accepted Answer

A)   concentrated nitric acid
B)   concentrated hydrochloric acid
C)   aqua regia, a mixture of concentrated nitric acid and concentrated hydrochloric acid
D)   all of the above can oxidize gold
E)   none of the above can oxidize gold because it is a noble metal and too low on the activity seriesF) D) and E)
G) B) and D)

Question 11

In which of the following compounds is nitrogen in a positive oxidation state

Accepted Answer

A)   NH3
B)   N2H4
C)   NH2OH
D)   N2
E)   NOF) C) and E)
G) A) and C)

Question 12

It is especially dangerous to mix cyanide salts with acids because the cyanide ion reacts with acid to form hydrogen cyanide, a very weak acid that comes out of solution as a gas. Inhaled in even very small amounts it can rapidly cause death.

Accepted Answer

A) True 
 B)False

Exam 22: Nonmetallic Elements and Their Compounds

Which of these reactions is an example of nitrogen fixation

Correct Answer
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The term catenation describes the

Correct Answer
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It is especially dangerous to mix cyanide salts with acids because the cyanide ion reacts with acid to form hydrogen cyanide, a very weak acid that comes out of solution as a gas. Inhaled in even very small amounts it can rapidly cause death.

Correct Answer
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Alkali metal hydrides are very reactive with water, forming H₂ gas.

Correct Answer
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Which of the following substances is a superoxide

Correct Answer
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When phosphate rock, Ca₃(PO₄) ₂(s) , is converted to phosphorus,

Correct Answer
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Which of the following will oxidize gold

Correct Answer
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In which of the following compounds is nitrogen in a positive oxidation state

Correct Answer
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Determine all of the covalent hydrides from the compounds listed below. I. CaH₂ II. H₂S III. SiH₄

Correct Answer
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The chemistry of fluorine differs in many ways from that of the rest of the halogens.

Correct Answer
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Which of these substances is the active ingredient in ordinary household bleach

Correct Answer
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The main commercial source of bromine is

Correct Answer
verified

Exam 22: Nonmetallic Elements and Their Compounds

Which of these reactions is an example of nitrogen fixation

Correct AnswerverifiedShow Answer

The term catenation describes the

Correct AnswerverifiedShow Answer

It is especially dangerous to mix cyanide salts with acids because the cyanide ion reacts with acid to form hydrogen cyanide, a very weak acid that comes out of solution as a gas. Inhaled in even very small amounts it can rapidly cause death.

Correct AnswerverifiedShow Answer

Alkali metal hydrides are very reactive with water, forming H2 gas.

Correct AnswerverifiedShow Answer

Which of the following substances is a superoxide

Correct AnswerverifiedShow Answer

When phosphate rock, Ca3(PO4) 2(s) , is converted to phosphorus,

Correct AnswerverifiedShow Answer

Which of the following will oxidize gold

Correct AnswerverifiedShow Answer

In which of the following compounds is nitrogen in a positive oxidation state

Correct AnswerverifiedShow Answer

Determine all of the covalent hydrides from the compounds listed below. I. CaH2 II. H2S III. SiH4

Correct AnswerverifiedShow Answer

The chemistry of fluorine differs in many ways from that of the rest of the halogens.

Correct AnswerverifiedShow Answer

Which of these substances is the active ingredient in ordinary household bleach

Correct AnswerverifiedShow Answer

The main commercial source of bromine is

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Alkali metal hydrides are very reactive with water, forming H₂ gas.

Correct Answer
verified

Correct Answer
verified

When phosphate rock, Ca₃(PO₄) ₂(s) , is converted to phosphorus,

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Determine all of the covalent hydrides from the compounds listed below. I. CaH₂ II. H₂S III. SiH₄

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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