Question 1

The formula of phosphorus(V)oxide is

Accepted Answer

A) P2O4. 
B) P4O6. 
C) P4O10. 
D) PO2. 
E) P2O3. 
A) P2O4. 
B) P4O6. 
C) P4O10. 
D) PO2. 
E) P2O3.

Question 2

Ammonia is both a weak Brønsted base in water and a strong Lewis base.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following can act as Lewis acid(s)?

Accepted Answer

A) NO. 
B) SO3.  
C) CO2. 
D) Na2O.  
E) A through C can.  
A) NO. 
B) SO3.  
C) CO2. 
D) Na2O.  
E) A through C can.

Question 4

Nitrogen triiodide can be prepared as the ammoniate,NI3·NH3.This compound is explosive when dry and decomposes according to the reaction below. 2NI3·NH3 $\rightarrow$  N2 + 2NH3 + 3I2
In this reaction,nitrogen undergoes a change in oxidation number from

Accepted Answer

A) +3 to 0. 
B) +3 to -3. 
C) There is no change in oxidation number occurs because this is not a redox reaction. 
D) +6 to 0. 
E) +1 to 0. 
A) +3 to 0. 
B) +3 to -3. 
C) There is no change in oxidation number occurs because this is not a redox reaction. 
D) +6 to 0. 
E) +1 to 0.

Question 5

Given that N2O3(g)dissociates to NO(g)and NO2(g),how many lone pairs of electrons are in the Lewis structure of N2O3?

Accepted Answer

A) 2 
B) 6 
C) 1 
D) 4 
E) 8 
A) 2 
B) 6 
C) 1 
D) 4 
E) 8

Question 6

Which of the following oxides is amphoteric?

Accepted Answer

A) NO2  
B) Sb2O3  
C) Bi2O3  
D) As4O6  
E) P2O5  
A) NO2  
B) Sb2O3  
C) Bi2O3  
D) As4O6  
E) P2O5

Question 7

Which of the following is diamagnetic?

Accepted Answer

A) O22- 
B) NO2 
C) O2 
D) O2- 
A) O22- 
B) NO2 
C) O2 
D) O2-

Question 8

Which of the following noble gases is least likely to react with fluorine?

Accepted Answer

A) Ar 
B) Rn 
C) Xe 
D) Kr 
E) Ne 
A) Ar 
B) Rn 
C) Xe 
D) Kr 
E) Ne

Question 9

Ammonium nitrate is explosive because

Accepted Answer

A) the ammonium ion decomposes readily. 
B) the ammonium ion can be oxidized by the nitrate ion. 
C) the nitrate ion decomposes readily. 
D) the ammonium ion is readily reduced. 
E) nitrate reacts readily with oxygen in air. 
A) the ammonium ion decomposes readily. 
B) the ammonium ion can be oxidized by the nitrate ion. 
C) the nitrate ion decomposes readily. 
D) the ammonium ion is readily reduced. 
E) nitrate reacts readily with oxygen in air.

Question 10

Bromine can be obtained from brines by oxidation of Br- by Cl2.

Accepted Answer

A) True 
 B)False

Question 11

The formula of hydrazine is

Accepted Answer

A) N2H2. 
B) HNO2. 
C) NH2NH2. 
D) HN3. 
E) NH2OH. 
A) N2H2. 
B) HNO2. 
C) NH2NH2. 
D) HN3. 
E) NH2OH.

Question 12

Hydrazine is used to eliminate dissolved,corrosive oxygen from the water used in high-pressure,high-temperature steam furnaces.In this reaction,the oxidation state of nitrogen in hydrazine changes from _____ to _____ .

Accepted Answer

N<sub>2</sub>H<sub>4

Question 13

Lead is obtained from the oxide PbO by

Accepted Answer

A) reduction with aluminum. 
B) treatment with concentrated sulfuric acid. 
C) reduction with carbon. 
D) reduction with CO(g). 
E) heating to 1600S1U1P1$\circ$S1S1P0C. 
A) reduction with aluminum. 
B) treatment with concentrated sulfuric acid. 
C) reduction with carbon. 
D) reduction with CO(g). 
E) heating to 1600S1U1P1$\circ$S1S1P0C.

Question 14

What is the function of aluminum in the thermite reaction?

Accepted Answer

It is the

Question 15

The complex (NH3)5RuN22+ can be synthesized by the reaction of hydrazine with RuCl3.In this reaction,the reducing agent is ____________ and the oxidizing agent is ____________.

Accepted Answer

Question 16

Magnesium nitride dissolves in water to produce

Accepted Answer

A) HNO3(aq)and MgO(s). 
B) N2(g)and MgO(s). 
C) NH3(g)and Mg(OH)2(s). 
D) Mg(NO3)2(aq). 
E) N2H4(l)and Mg(OH)2(s). 
A) HNO3(aq)and MgO(s). 
B) N2(g)and MgO(s). 
C) NH3(g)and Mg(OH)2(s). 
D) Mg(NO3)2(aq). 
E) N2H4(l)and Mg(OH)2(s).

Question 17

The electron affinities of elements are always positive.

Accepted Answer

A) True 
 B)False

Question 18

Nitric acid can never act as a reducing agent.

Accepted Answer

A) True 
 B)False

Question 19

What is the shape of sulfur dichloride?

Accepted Answer

A) Bent (~109o) 
B) Linear 
C) Bent (~120o) 
D) Trigonal pyramidal 
E) Tetrahedral 
A) Bent (~109o) 
B) Linear 
C) Bent (~120o) 
D) Trigonal pyramidal 
E) Tetrahedral

Question 20

What happens to the saline hydrides when they are dissolved in water?

Accepted Answer

They reduc

The formula of phosphorus(V)oxide is

Ammonia is both a weak Brønsted base in water and a strong Lewis base.

Which of the following can act as Lewis acid(s)?

Nitrogen triiodide can be prepared as the ammoniate,NI₃·NH₃.This compound is explosive when dry and decomposes according to the reaction below. 2NI₃·NH₃ $\rightarrow$ N₂ + 2NH₃ + 3I₂ In this reaction,nitrogen undergoes a change in oxidation number from

Given that N₂O₃(g)dissociates to NO(g)and NO₂(g),how many lone pairs of electrons are in the Lewis structure of N₂O₃?

Which of the following oxides is amphoteric?

Which of the following is diamagnetic?

Which of the following noble gases is least likely to react with fluorine?

Ammonium nitrate is explosive because

Bromine can be obtained from brines by oxidation of Br^- by Cl₂.

The formula of hydrazine is

Hydrazine is used to eliminate dissolved,corrosive oxygen from the water used in high-pressure,high-temperature steam furnaces.In this reaction,the oxidation state of nitrogen in hydrazine changes from _ to _ .

Lead is obtained from the oxide PbO by

What is the function of aluminum in the thermite reaction?

The complex (NH₃)₅RuN₂²⁺ can be synthesized by the reaction of hydrazine with RuCl₃.In this reaction,the reducing agent is and the oxidizing agent is .

Magnesium nitride dissolves in water to produce

The electron affinities of elements are always positive.

Nitric acid can never act as a reducing agent.

What is the shape of sulfur dichloride?

What happens to the saline hydrides when they are dissolved in water?

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

The formula of phosphorus(V)oxide is

Ammonia is both a weak Brønsted base in water and a strong Lewis base.

Which of the following can act as Lewis acid(s)?

Nitrogen triiodide can be prepared as the ammoniate,NI3·NH3.This compound is explosive when dry and decomposes according to the reaction below. 2NI3·NH3 →\rightarrow→ N2 + 2NH3 + 3I2 In this reaction,nitrogen undergoes a change in oxidation number from

Given that N2O3(g)dissociates to NO(g)and NO2(g),how many lone pairs of electrons are in the Lewis structure of N2O3?

Which of the following oxides is amphoteric?

Which of the following is diamagnetic?

Which of the following noble gases is least likely to react with fluorine?

Ammonium nitrate is explosive because

Bromine can be obtained from brines by oxidation of Br- by Cl2.

The formula of hydrazine is

Hydrazine is used to eliminate dissolved,corrosive oxygen from the water used in high-pressure,high-temperature steam furnaces.In this reaction,the oxidation state of nitrogen in hydrazine changes from _____ to _____ .

Lead is obtained from the oxide PbO by

What is the function of aluminum in the thermite reaction?

The complex (NH3)5RuN22+ can be synthesized by the reaction of hydrazine with RuCl3.In this reaction,the reducing agent is ____________ and the oxidizing agent is ____________.

Magnesium nitride dissolves in water to produce

The electron affinities of elements are always positive.

Nitric acid can never act as a reducing agent.

What is the shape of sulfur dichloride?

What happens to the saline hydrides when they are dissolved in water?

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

Nitrogen triiodide can be prepared as the ammoniate,NI₃·NH₃.This compound is explosive when dry and decomposes according to the reaction below. 2NI₃·NH₃ $\rightarrow$ N₂ + 2NH₃ + 3I₂ In this reaction,nitrogen undergoes a change in oxidation number from

Given that N₂O₃(g)dissociates to NO(g)and NO₂(g),how many lone pairs of electrons are in the Lewis structure of N₂O₃?

Bromine can be obtained from brines by oxidation of Br^- by Cl₂.

Hydrazine is used to eliminate dissolved,corrosive oxygen from the water used in high-pressure,high-temperature steam furnaces.In this reaction,the oxidation state of nitrogen in hydrazine changes from _ to _ .

The complex (NH₃)₅RuN₂²⁺ can be synthesized by the reaction of hydrazine with RuCl₃.In this reaction,the reducing agent is and the oxidizing agent is .