Question 1

Which elements of group 3A are commonly used in semiconductors?

Accepted Answer

A) B and Al 
B) Al and Ga 
C) Ga and In 
D) In and Tl 
A) B and Al 
B) Al and Ga 
C) Ga and In 
D) In and Tl

Question 2

SiO2 can be classified as a(n)

Accepted Answer

A) amorphous solid. 
B) covalent network solid. 
C) ionic solid. 
D) molecular solid. 
A) amorphous solid. 
B) covalent network solid. 
C) ionic solid. 
D) molecular solid.

Question 3

The elements indicated by the shaded area in the following periodic table are all

Accepted Answer

A) metals. 
B) nonmetals. 
C) p-block elements. 
D) s-block elements. 
A) metals. 
B) nonmetals. 
C) p-block elements. 
D) s-block elements.

Question 4

Which element of group 4A is the most abundant in the earth's crust?

Accepted Answer

A) C 
B) Si 
C) Sn 
D) Pb 
A) C 
B) Si 
C) Sn 
D) Pb

Question 5

-Which of the elements indicated on the above periodic table is a group 4A element that is a semiconductor?

Accepted Answer

A) element A 
B) element B 
C) element C 
D) element D 
A) element A 
B) element B 
C) element C 
D) element D

Question 6

Which one of the following elements can form more than four chemical bonds with other elements?

Accepted Answer

A) C 
B) N 
C) O 
D) As 
A) C 
B) N 
C) O 
D) As

Question 7

What is the charge,n,in the ion Si4O10n that is found in talc?

Accepted Answer

A) 2 - 
B) 4 - 
C) 8 - 
D) 10 - 
A) 2 - 
B) 4 - 
C) 8 - 
D) 10 -

Question 8

Shown below are four oxoanions of sulfur.Small gray spheres represent hydrogen,unshaded spheres represent oxygen,and dotted spheres represent sulfur.  
-Which oxoanion is the strongest base?

Accepted Answer

A) oxoanion (1) 
B) oxoanion (2) 
C) oxoanion (3) 
D) oxoanion (4) 
A) oxoanion (1) 
B) oxoanion (2) 
C) oxoanion (3) 
D) oxoanion (4)

Question 9

What is one method of making "laughing gas"?

Accepted Answer

A) NH4NO3(s)+ heat → N2O(g)+ 2 H2O(l) 
B) 3 Cu(s)+ 2 NO3-(aq)+ 8 H+(aq)→ 3 Cu2+(aq)+ 2 NO(g)+ 4 H2O(l) 
C) Cu(s)+ 2 NO3-(aq)+ 4 H+(aq)→ Cu2+(aq)+ 2 NO2(g)+ 2 H2O(l) 
D) 2 NO(g)+ O2(g)→ 2 NO2(g) 
A) NH4NO3(s)+ heat → N2O(g)+ 2 H2O(l) 
B) 3 Cu(s)+ 2 NO3-(aq)+ 8 H+(aq)→ 3 Cu2+(aq)+ 2 NO(g)+ 4 H2O(l) 
C) Cu(s)+ 2 NO3-(aq)+ 4 H+(aq)→ Cu2+(aq)+ 2 NO2(g)+ 2 H2O(l) 
D) 2 NO(g)+ O2(g)→ 2 NO2(g)

Question 10

What is the formula and charge of the silicate anion represented by the picture below?

Accepted Answer

A) SiO32- 
B) SiO44- 
C) Si2O63- 
D) Si2O76- 
A) SiO32- 
B) SiO44- 
C) Si2O63- 
D) Si2O76-

Question 11

Which one of the following is not a main group element?

Accepted Answer

A) Na 
B) Ba 
C) Fe 
D) Ga 
A) Na 
B) Ba 
C) Fe 
D) Ga

Question 12

Which one of the following compounds contains a three-center,two electron (3c-2e)bond?

Accepted Answer

A) B2H6 
B) C2H4 
C) N2H4 
D) H2O2 
A) B2H6 
B) C2H4 
C) N2H4 
D) H2O2

Question 13

Which of the following elements exhibits the most metallic character?

Accepted Answer

A) Ga 
B) Ge 
C) As 
D) Se 
A) Ga 
B) Ge 
C) As 
D) Se

Question 14

Adenosine triphosphate (ATP)plays an important role in energy transfer within cells.ATP can be considered to be an ester of triphosphoric acid,which is formed by the combination of three phosphoric acid molecules with the elimination of two water molecules.What is the formula of triphosphoric acid?

Accepted Answer

The answer of Adenosine triphosphate (ATP)plays an important role in...

Question 15

What is the chemical equation for the production of hydrazine?

Accepted Answer

A) N2(g)+ 3 H2(g)→ 2 NH3(g) 
B) 2 NH3(aq)+ OCl-(aq)→ N2H4(aq)+ H2O(l)+ Cl-(aq) 
C) 4 NH3(g)+ 5 O2(g)→ 4 NO(g)+ 6 H2O(l) 
D) Au(s)+ 3 NO3-(aq)+ 6 H+(aq)+ 4 Cl-(aq)→ AuCl4-(aq)+ 3 NO2(g)+ H2O(l) 
A) N2(g)+ 3 H2(g)→ 2 NH3(g) 
B) 2 NH3(aq)+ OCl-(aq)→ N2H4(aq)+ H2O(l)+ Cl-(aq) 
C) 4 NH3(g)+ 5 O2(g)→ 4 NO(g)+ 6 H2O(l) 
D) Au(s)+ 3 NO3-(aq)+ 6 H+(aq)+ 4 Cl-(aq)→ AuCl4-(aq)+ 3 NO2(g)+ H2O(l)

Question 16

What is the range of oxidation states that are exhibited by P?

Accepted Answer

A) from -3 to 0 
B) from -3 to +3 
C) from -3 to +5 
D) from 0 to +5 
A) from -3 to 0 
B) from -3 to +3 
C) from -3 to +5 
D) from 0 to +5

Question 17

Which element of group 6A has the highest boiling point?

Accepted Answer

A) S 
B) Se 
C) Te 
D) Po 
A) S 
B) Se 
C) Te 
D) Po

Question 18

-Which of the elements indicated on the above periodic table is a group 4A element that forms the strongest π bonds?

Accepted Answer

A) element A 
B) element B 
C) element C 
D) element D 
A) element A 
B) element B 
C) element C 
D) element D

Question 19

What is not a reaction commonly associated with cyanide ion?

Accepted Answer

A) H+(aq)+ CN-(aq)→ HCN(aq) 
B) Ag+(aq)+ CN-(aq)→ AgCN(s) 
C) 4 Au(s)+ 8 CN-(aq)+ O2(g)+ 2 H2O(l)→ 4 Au(CN)2-(aq)+ 4 OH-(aq) 
D) CN-(aq)+ H2(g)→ HCN(aq)+ H-(aq) 
A) H+(aq)+ CN-(aq)→ HCN(aq) 
B) Ag+(aq)+ CN-(aq)→ AgCN(s) 
C) 4 Au(s)+ 8 CN-(aq)+ O2(g)+ 2 H2O(l)→ 4 Au(CN)2-(aq)+ 4 OH-(aq) 
D) CN-(aq)+ H2(g)→ HCN(aq)+ H-(aq)

Question 20

Approximately 90% of the Earth's crust is composed of what type of compounds?

Accepted Answer

A) carbonates 
B) oxides 
C) silicates 
D) sulfides 
A) carbonates 
B) oxides 
C) silicates 
D) sulfides

Exam 19: The Main-Group Elements

Which elements of group 3A are commonly used in semiconductors?

SiO2 can be classified as a(n)

The elements indicated by the shaded area in the following periodic table are all

Which element of group 4A is the most abundant in the earth's crust?

-Which of the elements indicated on the above periodic table is a group 4A element that is a semiconductor?

Which one of the following elements can form more than four chemical bonds with other elements?

What is the charge,n,in the ion Si4O10n that is found in talc?

Shown below are four oxoanions of sulfur.Small gray spheres represent hydrogen,unshaded spheres represent oxygen,and dotted spheres represent sulfur. -Which oxoanion is the strongest base?

What is one method of making "laughing gas"?

What is the formula and charge of the silicate anion represented by the picture below?

Which one of the following is not a main group element?

Which one of the following compounds contains a three-center,two electron (3c-2e)bond?

Which of the following elements exhibits the most metallic character?

Adenosine triphosphate (ATP)plays an important role in energy transfer within cells.ATP can be considered to be an ester of triphosphoric acid,which is formed by the combination of three phosphoric acid molecules with the elimination of two water molecules.What is the formula of triphosphoric acid?

What is the chemical equation for the production of hydrazine?

What is the range of oxidation states that are exhibited by P?

Which element of group 6A has the highest boiling point?

-Which of the elements indicated on the above periodic table is a group 4A element that forms the strongest π bonds?

What is not a reaction commonly associated with cyanide ion?

Approximately 90% of the Earth's crust is composed of what type of compounds?

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

SiO₂ can be classified as a(n)

What is the charge,n,in the ion Si₄O₁₀ⁿ that is found in talc?