Question 1

Which of the following are good reducing agents? HNO3,PH3,HNO2,NCl3,NH3,NO

Accepted Answer

A) HNO3 and NO 
B) HNO2 and HNO3 
C) NCl3 and NH3 
D) NH3 and PH3 
E) NH3 only 
A) HNO3 and NO 
B) HNO2 and HNO3 
C) NCl3 and NH3 
D) NH3 and PH3 
E) NH3 only

Question 2

The role of magnesium in chlorophyll is

Accepted Answer

A) that of a hydrogenation catalyst. 
B) to keep the ring rigid. 
C) that of a reducing agent. 
D) that of an oxidizing agent. 
E) to react with water to produce hydrogen. 
A) that of a hydrogenation catalyst. 
B) to keep the ring rigid. 
C) that of a reducing agent. 
D) that of an oxidizing agent. 
E) to react with water to produce hydrogen.

Question 3

All of the oxides of the following elements are amphoteric except

Accepted Answer

A) P 
B) Ga 
C) As 
D) Sb 
A) P 
B) Ga 
C) As 
D) Sb

Question 4

Dinitrogen pentoxide is the anhydride of

Accepted Answer

A) nitrous acid. 
B) nitric acid. 
C) dinitrogen tetroxide. 
D) hydrazine. 
E) hydrazoic acid. 
A) nitrous acid. 
B) nitric acid. 
C) dinitrogen tetroxide. 
D) hydrazine. 
E) hydrazoic acid.

Question 5

Phosphorus(V)oxide reacts with water to produce

Accepted Answer

A) H3PO2. 
B) H3PO4. 
C) HPO3. 
D) H3PO3. 
E) H3PO2-. 
A) H3PO2. 
B) H3PO4. 
C) HPO3. 
D) H3PO3. 
E) H3PO2-.

Question 6

Solid sodium reduces nitrogen gas to form sodium nitride,Na3N.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following is paramagnetic?

Accepted Answer

A) N2  
B) N2O 
C) O22- 
D) O3  
E) NO 
A) N2  
B) N2O 
C) O22- 
D) O3  
E) NO

Question 8

The oxoacids of Group 17 have the general formula HXOn,where X is a halogen and n can take on values from 1 through 4.Which of the following is true?

Accepted Answer

A) As the oxidation number of X increases,the strength of the acid decreases. 
B) As the oxidation number of X increases,the oxidizing strength of the acid increases. 
C) Only the oxoacids with oxidation number +1 are strong acids. 
D) The oxoacids with oxidation number +1 are reducing agents. 
E) The oxoacids with oxidation number +7 are weak oxidizing agents. 
A) As the oxidation number of X increases,the strength of the acid decreases. 
B) As the oxidation number of X increases,the oxidizing strength of the acid increases. 
C) Only the oxoacids with oxidation number +1 are strong acids. 
D) The oxoacids with oxidation number +1 are reducing agents. 
E) The oxoacids with oxidation number +7 are weak oxidizing agents.

Question 9

The contact process for the production of sulfuric acid is S(g)+ O2(g)$\rightarrow$ SO2(g)
2SO2(g)+ O2(g)$\rightarrow$ 2SO3(g)
SO3(g)+ H2SO4(l)$\rightarrow$ H2S2O7(l)
H2S2O7(l)+ H2O(l)$\rightarrow$ 2H2SO4(l)
How many moles of "new" sulfuric acid are produced from 150 mol S(g)?

Accepted Answer

A) 300 mol 
B) 450 mol 
C) 225 mol 
D) 150 mol 
E) 75 mol 
A) 300 mol 
B) 450 mol 
C) 225 mol 
D) 150 mol 
E) 75 mol

Question 10

Which of the following compounds is predicted to have bonds with the most covalent character?

Accepted Answer

A) MgF2  
B) LiF 
C) CsI 
D) MgI2  
E) BaBr2  
A) MgF2  
B) LiF 
C) CsI 
D) MgI2  
E) BaBr2

Question 11

How do the saline hydrides react in water?

Accepted Answer

A) They reduce water and produce O2(g). 
B) They all produce H3O+(aq). 
C) They oxidize water and produce O2(g). 
D) Saline hydrides are actually insoluble in water. 
E) They reduce water and produce H2(g). 
A) They reduce water and produce O2(g). 
B) They all produce H3O+(aq). 
C) They oxidize water and produce O2(g). 
D) Saline hydrides are actually insoluble in water. 
E) They reduce water and produce H2(g).

Question 12

Sulfur dioxide can act as both an oxidizing agent and a reducing agent; explain.

Accepted Answer

In sulfur dioxide,th

Question 13

What occurs when beryllium is added to aqueous sodium hydroxide?

Accepted Answer

A) Be(OH)2(s)precipitates. 
B) Beryllium dissolves to form [Be(OH)4]2-(aq). 
C) Beryllium dissolves to form [Be(OH2)6]2+(aq). 
D) O2(g)is produced. 
E) No reaction occurs because beryllium is not soluble in aqueous sodium hydroxide. 
A) Be(OH)2(s)precipitates. 
B) Beryllium dissolves to form [Be(OH)4]2-(aq). 
C) Beryllium dissolves to form [Be(OH2)6]2+(aq). 
D) O2(g)is produced. 
E) No reaction occurs because beryllium is not soluble in aqueous sodium hydroxide.

Question 14

Which of the following does not act as a Lewis acid?

Accepted Answer

A) Na2O 
B) NO  
C) NO2 
D) SO3  
E) CO2  
A) Na2O 
B) NO  
C) NO2 
D) SO3  
E) CO2

Question 15

The phase diagram for helium

Accepted Answer

A) indicates that helium exists as He(g)and He(l)at about 2 K. 
B) indicates that helium exists only as a gas. 
C) has two triple points. 
D) indicates that helium can be liquefied at ordinary pressures. 
E) indicates that helium has three phases. 
A) indicates that helium exists as He(g)and He(l)at about 2 K. 
B) indicates that helium exists only as a gas. 
C) has two triple points. 
D) indicates that helium can be liquefied at ordinary pressures. 
E) indicates that helium has three phases.

Question 16

Diborane has

Accepted Answer

A) 2 bridging hydrogens and 4 terminal hydrogens. 
B) 1 BF3-anion and 1 BF3+ cation. 
C) 4 bridging hydrogens and 2 terminal hydrogens. 
D) 6 terminal hydrogens and 1 boron-boron bond. 
E) 1 bridging hydrogen,4 terminal hydrogens,and an ionic hydrogen. 
A) 2 bridging hydrogens and 4 terminal hydrogens. 
B) 1 BF3-anion and 1 BF3+ cation. 
C) 4 bridging hydrogens and 2 terminal hydrogens. 
D) 6 terminal hydrogens and 1 boron-boron bond. 
E) 1 bridging hydrogen,4 terminal hydrogens,and an ionic hydrogen.

Question 17

Which of the following concentrated acids can be safely transported in passivated lead containers?

Accepted Answer

A) HClO4  
B) H2SO4  
C) HI 
D) HCl 
E) HNO3  
A) HClO4  
B) H2SO4  
C) HI 
D) HCl 
E) HNO3

Question 18

Which of the following pairs are allotropes?

Accepted Answer

A) S8(s)and H2S(g) 
B) S(s)and SO2(g) 
C) O2(g)and H2O2(l) 
D) C(s)and CO2(g) 
E) O2(g)and O3(g) 
A) S8(s)and H2S(g) 
B) S(s)and SO2(g) 
C) O2(g)and H2O2(l) 
D) C(s)and CO2(g) 
E) O2(g)and O3(g)

Question 19

The alkali metals all react with water.Which is the most reactive metal?

Accepted Answer

A) Li 
B) Na 
C) Cs 
D) Rb 
E) K 
A) Li 
B) Na 
C) Cs 
D) Rb 
E) K

Question 20

When XeF4 acts as a fluorinating agent,

Accepted Answer

A) F2 is produced. 
B) XeF4 disproportionates. 
C) XeF3+ is produced and is the reactive species. 
D) Xe is reduced. 
E) Xe is oxidized. 
A) F2 is produced. 
B) XeF4 disproportionates. 
C) XeF3+ is produced and is the reactive species. 
D) Xe is reduced. 
E) Xe is oxidized.

Which of the following are good reducing agents? HNO₃,PH₃,HNO₂,NCl₃,NH₃,NO

The role of magnesium in chlorophyll is

All of the oxides of the following elements are amphoteric except

Dinitrogen pentoxide is the anhydride of

Phosphorus(V)oxide reacts with water to produce

Solid sodium reduces nitrogen gas to form sodium nitride,Na₃N.

Which of the following is paramagnetic?

The oxoacids of Group 17 have the general formula HXO_n,where X is a halogen and n can take on values from 1 through 4.Which of the following is true?

Which of the following compounds is predicted to have bonds with the most covalent character?

How do the saline hydrides react in water?

Sulfur dioxide can act as both an oxidizing agent and a reducing agent; explain.

What occurs when beryllium is added to aqueous sodium hydroxide?

Which of the following does not act as a Lewis acid?

The phase diagram for helium

Diborane has

Which of the following concentrated acids can be safely transported in passivated lead containers?

Which of the following pairs are allotropes?

The alkali metals all react with water.Which is the most reactive metal?

When XeF₄ acts as a fluorinating agent,

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

Exam 16: The Elements: the Main Group Elements

Which of the following are good reducing agents? HNO3,PH3,HNO2,NCl3,NH3,NO

The role of magnesium in chlorophyll is

All of the oxides of the following elements are amphoteric except

Dinitrogen pentoxide is the anhydride of

Phosphorus(V)oxide reacts with water to produce

Solid sodium reduces nitrogen gas to form sodium nitride,Na3N.

Which of the following is paramagnetic?

The oxoacids of Group 17 have the general formula HXOn,where X is a halogen and n can take on values from 1 through 4.Which of the following is true?

The contact process for the production of sulfuric acid is S(g)+ O2(g) →\rightarrow→ SO2(g) 2SO2(g)+ O2(g) →\rightarrow→ 2SO3(g) SO3(g)+ H2SO4(l) →\rightarrow→ H2S2O7(l) H2S2O7(l)+ H2O(l) →\rightarrow→ 2H2SO4(l) How many moles of "new" sulfuric acid are produced from 150 mol S(g)?

Which of the following compounds is predicted to have bonds with the most covalent character?

How do the saline hydrides react in water?

Sulfur dioxide can act as both an oxidizing agent and a reducing agent; explain.

What occurs when beryllium is added to aqueous sodium hydroxide?

Which of the following does not act as a Lewis acid?

The phase diagram for helium

Diborane has

Which of the following concentrated acids can be safely transported in passivated lead containers?

Which of the following pairs are allotropes?

The alkali metals all react with water.Which is the most reactive metal?

When XeF4 acts as a fluorinating agent,

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

Which of the following are good reducing agents? HNO₃,PH₃,HNO₂,NCl₃,NH₃,NO

Solid sodium reduces nitrogen gas to form sodium nitride,Na₃N.

The oxoacids of Group 17 have the general formula HXO_n,where X is a halogen and n can take on values from 1 through 4.Which of the following is true?

When XeF₄ acts as a fluorinating agent,