Question 1

The formula of boric acid written as a Brønsted acid is

Accepted Answer

A) HB(OH)2 
B) B(OH2)33+ 
C) B(OH)4- 
D) HB(OH)3 
E) B(OH)3OH2 
A) HB(OH)2 
B) B(OH2)33+ 
C) B(OH)4- 
D) HB(OH)3 
E) B(OH)3OH2

Question 2

Phosphine does not act as a Brønsted base but does act as a Lewis base.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following does not involve CO acting as a reducing agent?

Accepted Answer

A) PbO(s)+ CO(g)$\rightarrow$ Pb(s)+ CO2(g). 
B) CO(g)+ H2O(g)$\rightarrow$ CO2(g)+ H2(g). 
C) 2CO(g)+ O2(g)$\rightarrow$ 2CO2(g). 
D) Ni(s)+ 4CO(g)$\rightarrow$Ni(CO)4(g). 
E) Fe2O3(s)+ 3CO(g)$\rightarrow$2Fe(s)+ 3CO2(g). 
A) PbO(s)+ CO(g)$\rightarrow$ Pb(s)+ CO2(g). 
B) CO(g)+ H2O(g)$\rightarrow$ CO2(g)+ H2(g). 
C) 2CO(g)+ O2(g)$\rightarrow$ 2CO2(g). 
D) Ni(s)+ 4CO(g)$\rightarrow$Ni(CO)4(g). 
E) Fe2O3(s)+ 3CO(g)$\rightarrow$2Fe(s)+ 3CO2(g).

Question 4

Which of the Group 15 elements is(are)a metalloid(s)?

Accepted Answer

A) As only 
B) As and Sb 
C) P and As 
D) P,As,and Sb 
E) As,Sb,and Bi 
A) As only 
B) As and Sb 
C) P and As 
D) P,As,and Sb 
E) As,Sb,and Bi

Question 5

The formula of diborane is

Accepted Answer

A) BH3.  
B) B2H6.  
C) B2H4.  
D) B2H2.  
E) B2H. 
A) BH3.  
B) B2H6.  
C) B2H4.  
D) B2H2.  
E) B2H.

Question 6

Quicklime,CaO(s),reacts with C(s)to produce A plus carbon monoxide.When A is added to water,B and C are produced.Write the formulas of A,B,and C.

Accepted Answer

A) Ca(s),O2(g),and Ca(OH)2(aq) 
B) CaO(s)does not react with C(s). 
C) CaC2(s),H2(g),and Ca(OH)2(aq) 
D) Ca(s),H2(g),and Ca(OH)2(aq) 
E) CaC2(s),C2H2(g),and Ca(OH)2(aq) 
A) Ca(s),O2(g),and Ca(OH)2(aq) 
B) CaO(s)does not react with C(s). 
C) CaC2(s),H2(g),and Ca(OH)2(aq) 
D) Ca(s),H2(g),and Ca(OH)2(aq) 
E) CaC2(s),C2H2(g),and Ca(OH)2(aq)

Question 7

Lithium and sodium burn in air to produce

Accepted Answer

A) Li2O(s)and Na2O(s). 
B) LiO2(s)and Na2O(s). 
C) Li2O(s)and Na2O2(s). 
D) LiO2(s)and Na2O2(s). 
E) Li2O2(s)and NaO2(s). 
A) Li2O(s)and Na2O(s). 
B) LiO2(s)and Na2O(s). 
C) Li2O(s)and Na2O2(s). 
D) LiO2(s)and Na2O2(s). 
E) Li2O2(s)and NaO2(s).

Question 8

Which of the following pairs of elements both have acidic oxides?

Accepted Answer

A) Ca and As 
B) Mg and Al 
C) B and Li 
D) In and Sn 
E) P and Se 
A) Ca and As 
B) Mg and Al 
C) B and Li 
D) In and Sn 
E) P and Se

Question 9

The first reaction in the Ostwald process for the synthesis of nitric acid is the

Accepted Answer

A) oxidation of ammonia to nitrogen dioxide. 
B) reduction of ammonia with copper. 
C) decomposition of ammonia to nitrogen and hydrogen. 
D) production of NH3(l). 
E) oxidation of ammonia to nitrogen oxide. 
A) oxidation of ammonia to nitrogen dioxide. 
B) reduction of ammonia with copper. 
C) decomposition of ammonia to nitrogen and hydrogen. 
D) production of NH3(l). 
E) oxidation of ammonia to nitrogen oxide.

Question 10

Aluminum oxide dissolves in aqueous base.What are the products of this reaction?

Accepted Answer

A) Al(OH2)63+(aq)and H2(g) 
B) Al2O3(s)and H2(g) 
C) Al(OH2)63+(aq)and O2(g) 
D) Al(OH)4-(aq)and H2(g) 
E) Al(OH)4-(aq)and O2(g) 
A) Al(OH2)63+(aq)and H2(g) 
B) Al2O3(s)and H2(g) 
C) Al(OH2)63+(aq)and O2(g) 
D) Al(OH)4-(aq)and H2(g) 
E) Al(OH)4-(aq)and O2(g)

Question 11

Which of the following has the largest bond enthalpy?

Accepted Answer

A) HCl 
B) All the bond enthalpies are the same. 
C) HBr 
D) HF 
E) HI 
A) HCl 
B) All the bond enthalpies are the same. 
C) HBr 
D) HF 
E) HI

Question 12

Hydrogen can be made from fossil fuels in a series of two catalyzed reactions.One of these reactions,the re-forming reaction,is

Accepted Answer

A) Cu(s)+ 2H+(aq)$\rightarrow$Cu2+(aq)+ H2(g). 
B) 2H2O(l)$\rightarrow$2H2(g)+ O2(g). 
C) CH3OH(l)$\rightarrow$2H2(g)+ CO(g). 
D) CH4(g)+ H2O(g)$\rightarrow$ CO(g)+ 3H2(g). 
E) Zn(s)+ 2HCl(aq)$\rightarrow$ZnCl2(aq)+ H2(g). 
A) Cu(s)+ 2H+(aq)$\rightarrow$Cu2+(aq)+ H2(g). 
B) 2H2O(l)$\rightarrow$2H2(g)+ O2(g). 
C) CH3OH(l)$\rightarrow$2H2(g)+ CO(g). 
D) CH4(g)+ H2O(g)$\rightarrow$ CO(g)+ 3H2(g). 
E) Zn(s)+ 2HCl(aq)$\rightarrow$ZnCl2(aq)+ H2(g).

Question 13

Order the following ions according to their radii from largest to smallest: H-,Cl-,-.

Accepted Answer

Cl<sup>-</

Question 14

Of the following compounds,which does not exist?

Accepted Answer

A) NCl5 
B) PCl3 
C) PCl5 
D) NCl3 
A) NCl5 
B) PCl3 
C) PCl5 
D) NCl3

Question 15

In the following reaction 2KNO3(s)+ 4C(s)$\rightarrow$ K2CO3(s)+ 3CO(g)+ N2(g)
The reducing agent is

Accepted Answer

A) CO(g). 
B) KNO3(s). 
C) K2CO3(s). 
D) C(s). 
E) N2(g). 
A) CO(g). 
B) KNO3(s). 
C) K2CO3(s). 
D) C(s). 
E) N2(g).

Question 16

When phosphoric acid and potassium bromide are mixed,a product is

Accepted Answer

A) HBrO(g). 
B) HBr(g). 
C) PBr2(g). 
D) Br2(g). 
E) P4(s). 
A) HBrO(g). 
B) HBr(g). 
C) PBr2(g). 
D) Br2(g). 
E) P4(s).

Question 17

In the Ostwald process,the total change in oxidation number of nitrogen from reactant to nitric acid is

Accepted Answer

A) 5. 
B) 3. 
C) 6. 
D) 8. 
E) 7. 
A) 5. 
B) 3. 
C) 6. 
D) 8. 
E) 7.

Question 18

Which of the following is not true?

Accepted Answer

A) In diamond,each carbon atom is sp3-hybridized and linked to its four neighbors,with all electrons in C-C  $\sigma$-bonds. 
B) C60 is molecular and thus soluble in solvents like benzene. 
C) Graphite consists of planar sheets of sp2-hybridized carbon atoms and electrons can move from one carbon to another through a delocalized $\pi$-network formed by the overlap of unhybridized p-orbitals. 
D) Graphite is an electrically conducting solid. 
E) Diamond is an excellent conductor of heat. 
A) In diamond,each carbon atom is sp3-hybridized and linked to its four neighbors,with all electrons in C-C  $\sigma$-bonds. 
B) C60 is molecular and thus soluble in solvents like benzene. 
C) Graphite consists of planar sheets of sp2-hybridized carbon atoms and electrons can move from one carbon to another through a delocalized $\pi$-network formed by the overlap of unhybridized p-orbitals. 
D) Graphite is an electrically conducting solid. 
E) Diamond is an excellent conductor of heat.

Question 19

The equation that corresponds to the Ka for boric acid is

Accepted Answer

A) B4O5(OH)42-(aq)+ 5H2O(l)b 4H3BO3(aq)+ 2OH-(aq). 
B) H3BO3(aq)+ H2O(l)b HB(OH)3+(aq)+ OH-(aq). 
C) (OH)3BOH2(aq)+ H2O(l)b B(OH)4-(aq)+ H3O+(aq). 
D) B(OH)4-(aq)+ H+(aq)b B(OH)3(aq)+ H2O(l). 
E) B4O72-(aq)+ H2O(l)b B4O8H3-(aq)+ H+(aq). 
A) B4O5(OH)42-(aq)+ 5H2O(l)b 4H3BO3(aq)+ 2OH-(aq). 
B) H3BO3(aq)+ H2O(l)b HB(OH)3+(aq)+ OH-(aq). 
C) (OH)3BOH2(aq)+ H2O(l)b B(OH)4-(aq)+ H3O+(aq). 
D) B(OH)4-(aq)+ H+(aq)b B(OH)3(aq)+ H2O(l). 
E) B4O72-(aq)+ H2O(l)b B4O8H3-(aq)+ H+(aq).

Question 20

The allotropes of carbon are graphite,diamond,and the fullerenes.These are all network solids.

Accepted Answer

A) True 
 B)False

The formula of boric acid written as a Brønsted acid is

Phosphine does not act as a Brønsted base but does act as a Lewis base.

Which of the following does not involve CO acting as a reducing agent?

Which of the Group 15 elements is(are)a metalloid(s)?

The formula of diborane is

Quicklime,CaO(s),reacts with C(s)to produce A plus carbon monoxide.When A is added to water,B and C are produced.Write the formulas of A,B,and C.

Lithium and sodium burn in air to produce

Which of the following pairs of elements both have acidic oxides?

The first reaction in the Ostwald process for the synthesis of nitric acid is the

Aluminum oxide dissolves in aqueous base.What are the products of this reaction?

Which of the following has the largest bond enthalpy?

Hydrogen can be made from fossil fuels in a series of two catalyzed reactions.One of these reactions,the re-forming reaction,is

Order the following ions according to their radii from largest to smallest: H^-,Cl^-,^-.

Of the following compounds,which does not exist?

In the following reaction 2KNO₃(s)+ 4C(s) $\rightarrow$ K₂CO₃(s)+ 3CO(g)+ N₂(g) The reducing agent is

When phosphoric acid and potassium bromide are mixed,a product is

In the Ostwald process,the total change in oxidation number of nitrogen from reactant to nitric acid is

Which of the following is not true?

The equation that corresponds to the K_a for boric acid is

The allotropes of carbon are graphite,diamond,and the fullerenes.These are all network solids.

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: The D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

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Exam 16: The Elements: the Main Group Elements

The formula of boric acid written as a Brønsted acid is

Phosphine does not act as a Brønsted base but does act as a Lewis base.

Which of the following does not involve CO acting as a reducing agent?

Which of the Group 15 elements is(are)a metalloid(s)?

The formula of diborane is

Quicklime,CaO(s),reacts with C(s)to produce A plus carbon monoxide.When A is added to water,B and C are produced.Write the formulas of A,B,and C.

Lithium and sodium burn in air to produce

Which of the following pairs of elements both have acidic oxides?

The first reaction in the Ostwald process for the synthesis of nitric acid is the

Aluminum oxide dissolves in aqueous base.What are the products of this reaction?

Which of the following has the largest bond enthalpy?

Hydrogen can be made from fossil fuels in a series of two catalyzed reactions.One of these reactions,the re-forming reaction,is

Order the following ions according to their radii from largest to smallest: H-,Cl-,-.

Of the following compounds,which does not exist?

In the following reaction 2KNO3(s)+ 4C(s) →\rightarrow→ K2CO3(s)+ 3CO(g)+ N2(g) The reducing agent is

When phosphoric acid and potassium bromide are mixed,a product is

In the Ostwald process,the total change in oxidation number of nitrogen from reactant to nitric acid is

Which of the following is not true?

The equation that corresponds to the Ka for boric acid is

The allotropes of carbon are graphite,diamond,and the fullerenes.These are all network solids.

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: The D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

Order the following ions according to their radii from largest to smallest: H^-,Cl^-,^-.

In the following reaction 2KNO₃(s)+ 4C(s) $\rightarrow$ K₂CO₃(s)+ 3CO(g)+ N₂(g) The reducing agent is

The equation that corresponds to the K_a for boric acid is