Question 1

Which of the following molecules requires the most energy to split into gaseous atoms?

Accepted Answer

A)  CO 
B)  F2  
C)  O2  
D)  N2  
E)  Cl2  
A)  CO 
B)  F2  
C)  O2  
D)  N2  
E)  Cl2  A

Question 2

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. B

Question 3

Phosphorus pentachloride reacts with water to give

Accepted Answer

A)  H3PO3(s) and HCl(g). 
B)  H3PO4(l) and HClO(aq). 
C)  H3PO3(s) and Cl2(g). 
D)  H3PO4(l) and Cl2(g). 
E)  H3PO4(l) and HCl(g). 
A)  H3PO3(s) and HCl(g). 
B)  H3PO4(l) and HClO(aq). 
C)  H3PO3(s) and Cl2(g). 
D)  H3PO4(l) and Cl2(g). 
E)  H3PO4(l) and HCl(g). E

Question 4

All of the following react with water to form hydrogen and a hydroxide except

Accepted Answer

A)  Mg. 
B)  Na. 
C)  Ca. 
D)  K. 
E)  Be. 
A)  Mg. 
B)  Na. 
C)  Ca. 
D)  K. 
E)  Be.

Question 5

When aluminum sulfate is dissolved in water,is the resulting solution acidic or basic? Explain.

Accepted Answer

acidic; Al(OH₂)₆³⁺(aq)+

Question 6

What is the formula of baking soda?

Accepted Answer

A)  NaS1U1B12S1U1B0COS1U1B13S1U1B0.HS1U1B12S1U1B0O 
B)  NaHCOS1U1B13S1U1B0 
C)  NaHSOS1U1B14S1U1B0 
D)  NaS1U1B12S1U1B0SOS1U1B14S1U1B0 
E)  NaS1U1B12S1U1B0COS1U1B13S1U1B0 
A)  NaS1U1B12S1U1B0COS1U1B13S1U1B0.HS1U1B12S1U1B0O 
B)  NaHCOS1U1B13S1U1B0 
C)  NaHSOS1U1B14S1U1B0 
D)  NaS1U1B12S1U1B0SOS1U1B14S1U1B0 
E)  NaS1U1B12S1U1B0COS1U1B13S1U1B0

Question 7

In the reaction
Cu2+(aq)+ 4NH3(aq)$\rightarrow$Cu(NH3)4+(aq)
the Lewis acid is ____________ and the Lewis base is ____________.

Accepted Answer

Question 8

Write the formula of the hydride ion.

Accepted Answer

The answer of Write the formula of the hydride ion....

Question 9

All of the following form clathrates with water except

Accepted Answer

A)  CH4 
B)  SO2 
C)  NO 
D)  CO2 
E)  Ne 
A)  CH4 
B)  SO2 
C)  NO 
D)  CO2 
E)  Ne

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

The equation for the hydrometallurgical extraction of silver is

Accepted Answer

A)  AgS1U1P1+S1S1P0(aq) + ClS1U1P1-S1S1P0(aq) $\rarr$ AgCl(s). 
B)  AgS1U1P1+S1S1P0(aq) + 2SS1U1B12S1U1B0OS1U1B13S1U1B0S1U1P12-S1S1P0(aq) $\rarr$ Ag(SS1U1B12S1U1B0OS1U1B13S1U1B0)S1U1B12S1U1B0S1U1P13-S1S1P0(aq). 
C)  AgS1U1P1+S1S1P0(aq) + 2CNS1U1P1-S1S1P0(aq) $\rarr$ Ag(CN)S1U1B12S1U1B0S1U1P1-S1S1P0(aq). 
D)  2Ag(s) + 2HS1U1P1+S1S1P0(aq) $\rarr$  AgS1U1P1+S1S1P0(aq) + HS1U1B12S1U1B0(g). 
E)  AgS1U1P1+S1S1P0(aq) + HS1U1B12S1U1B0(g) $\rarr$ 2Ag(s) + 2HS1U1P1+S1S1P0(aq). 
A)  AgS1U1P1+S1S1P0(aq) + ClS1U1P1-S1S1P0(aq) $\rarr$ AgCl(s). 
B)  AgS1U1P1+S1S1P0(aq) + 2SS1U1B12S1U1B0OS1U1B13S1U1B0S1U1P12-S1S1P0(aq) $\rarr$ Ag(SS1U1B12S1U1B0OS1U1B13S1U1B0)S1U1B12S1U1B0S1U1P13-S1S1P0(aq). 
C)  AgS1U1P1+S1S1P0(aq) + 2CNS1U1P1-S1S1P0(aq) $\rarr$ Ag(CN)S1U1B12S1U1B0S1U1P1-S1S1P0(aq). 
D)  2Ag(s) + 2HS1U1P1+S1S1P0(aq) $\rarr$  AgS1U1P1+S1S1P0(aq) + HS1U1B12S1U1B0(g). 
E)  AgS1U1P1+S1S1P0(aq) + HS1U1B12S1U1B0(g) $\rarr$ 2Ag(s) + 2HS1U1P1+S1S1P0(aq).

Question 12

Boron nitride is produced from the reaction of

Accepted Answer

A)  B(s) and HCN(g). 
B)  B(s) and NH3(g). 
C)  B2O3(s) and NH3(g). 
D)  B2H6(g) and N2(g). 
E)  B(s) and N2(g). 
A)  B(s) and HCN(g). 
B)  B(s) and NH3(g). 
C)  B2O3(s) and NH3(g). 
D)  B2H6(g) and N2(g). 
E)  B(s) and N2(g).

Question 13

The nitrate ion can act as a reducing agent only in redox reactions.

Accepted Answer

A) True 
 B)False

Question 14

All of the following contain silicates in various forms except

Accepted Answer

A)  asbestos. 
B)  mica. 
C)  talc. 
D)  molecular sieves. 
E)  alum. 
A)  asbestos. 
B)  mica. 
C)  talc. 
D)  molecular sieves. 
E)  alum.

Question 15

The formula of boric acid written as a Lewis acid is

Accepted Answer

A)  B(OH)S1U1B13S1U1B0 
B)  HB(OH)S1U1B13S1U1B0 
C)  HB(OH)S1U1B14S1U1B0 
D) B(OH)S1U1B14S1U1B0S1U1P1-S1S1P0 
E)  HB(OH)S1U1B12S1U1B0 
A)  B(OH)S1U1B13S1U1B0 
B)  HB(OH)S1U1B13S1U1B0 
C)  HB(OH)S1U1B14S1U1B0 
D) B(OH)S1U1B14S1U1B0S1U1P1-S1S1P0 
E)  HB(OH)S1U1B12S1U1B0

Question 16

The phase diagram for helium-4 indicates that

Accepted Answer

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

Question 17

Nitric acid can never act as a reducing agent.

Accepted Answer

A) True 
 B)False

Question 18

Carbon dioxide is the formal anhydride of

Accepted Answer

A)  H2CO3 
B)  HCOOH 
C)  H2CO 
D) CO32- 
A)  H2CO3 
B)  HCOOH 
C)  H2CO 
D) CO32-

Question 19

Which of the following reactions are hydrolysis reactions?
1.PCl3(l)+ 3H2O(l)$\rightarrow$H3PO3(aq)+ 3 HCl(aq)
2.Mg3N2(s)+ 6H2O(l)$\rightarrow$ 3Mg(OH)3(s)+ 2NH3(g)
3.N2H4(aq)+ O2(g)$\rightarrow$N2(g)+ 2H2O(l)
4.SiF4(g)+ 2H2O(l)$\rightarrow$ SiO2(s)+ 4HF(aq)

Accepted Answer

A)  1 only 
B)  2 and 4 
C)  2 and 3 
D)  1 and 4 
E)  2 only 
A)  1 only 
B)  2 and 4 
C)  2 and 3 
D)  1 and 4 
E)  2 only

Question 20

What is the voltage for the water-splitting reaction to produce hydrogen and oxygen from water? (Consult a table of standard potentials.)

Accepted Answer

The answer of What is the voltage for the water-splitting...

Which of the following molecules requires the most energy to split into gaseous atoms?

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?

Phosphorus pentachloride reacts with water to give

All of the following react with water to form hydrogen and a hydroxide except

When aluminum sulfate is dissolved in water,is the resulting solution acidic or basic? Explain.

What is the formula of baking soda?

In the reaction Cu²⁺(aq)+ 4NH₃(aq) $\rightarrow$ Cu(NH₃)₄⁺(aq) the Lewis acid is and the Lewis base is .

Write the formula of the hydride ion.

All of the following form clathrates with water except

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

The equation for the hydrometallurgical extraction of silver is

Boron nitride is produced from the reaction of

The nitrate ion can act as a reducing agent only in redox reactions.

All of the following contain silicates in various forms except

The formula of boric acid written as a Lewis acid is

The phase diagram for helium-4 indicates that

Nitric acid can never act as a reducing agent.

Carbon dioxide is the formal anhydride of

Which of the following reactions are hydrolysis reactions? 1.PCl₃(l)+ 3H₂O(l) $\rightarrow$ H₃PO₃(aq)+ 3 HCl(aq) 2.Mg₃N₂(s)+ 6H₂O(l) $\rightarrow$ 3Mg(OH)₃(s)+ 2NH₃(g) 3.N₂H₄(aq)+ O₂(g) $\rightarrow$ N₂(g)+ 2H₂O(l) 4.SiF₄(g)+ 2H₂O(l) $\rightarrow$ SiO₂(s)+ 4HF(aq)

What is the voltage for the water-splitting reaction to produce hydrogen and oxygen from water? (Consult a table of standard potentials.)

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Exam 8: The Main-Group Elements

Which of the following molecules requires the most energy to split into gaseous atoms?

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?

Phosphorus pentachloride reacts with water to give

All of the following react with water to form hydrogen and a hydroxide except

When aluminum sulfate is dissolved in water,is the resulting solution acidic or basic? Explain.

What is the formula of baking soda?

In the reaction Cu2+(aq)+ 4NH3(aq) →\rightarrow→ Cu(NH3)4+(aq) the Lewis acid is ____________ and the Lewis base is ____________.

Write the formula of the hydride ion.

All of the following form clathrates with water except

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

The equation for the hydrometallurgical extraction of silver is

Boron nitride is produced from the reaction of

The nitrate ion can act as a reducing agent only in redox reactions.

All of the following contain silicates in various forms except

The formula of boric acid written as a Lewis acid is

The phase diagram for helium-4 indicates that

Nitric acid can never act as a reducing agent.

Carbon dioxide is the formal anhydride of

Which of the following reactions are hydrolysis reactions? 1.PCl3(l)+ 3H2O(l) →\rightarrow→ H3PO3(aq)+ 3 HCl(aq) 2.Mg3N2(s)+ 6H2O(l) →\rightarrow→ 3Mg(OH)3(s)+ 2NH3(g) 3.N2H4(aq)+ O2(g) →\rightarrow→ N2(g)+ 2H2O(l) 4.SiF4(g)+ 2H2O(l) →\rightarrow→ SiO2(s)+ 4HF(aq)

What is the voltage for the water-splitting reaction to produce hydrogen and oxygen from water? (Consult a table of standard potentials.)

Atoms

Molecules

States of Matter

Thermodynamics

Equilibrium

Reactions

Kinetics

The D-Block Elements

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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?

In the reaction Cu²⁺(aq)+ 4NH₃(aq) $\rightarrow$ Cu(NH₃)₄⁺(aq) the Lewis acid is and the Lewis base is .

Which of the following reactions are hydrolysis reactions? 1.PCl₃(l)+ 3H₂O(l) $\rightarrow$ H₃PO₃(aq)+ 3 HCl(aq) 2.Mg₃N₂(s)+ 6H₂O(l) $\rightarrow$ 3Mg(OH)₃(s)+ 2NH₃(g) 3.N₂H₄(aq)+ O₂(g) $\rightarrow$ N₂(g)+ 2H₂O(l) 4.SiF₄(g)+ 2H₂O(l) $\rightarrow$ SiO₂(s)+ 4HF(aq)