Question 1

What is the molecular structure of germanium that is used in semiconductors?

Accepted Answer

A) body centered 
B) diamond-like 
C) graphite-like 
D) simple cubic 
A) body centered 
B) diamond-like 
C) graphite-like 
D) simple cubic B

Question 2

Which element of group 5A has the most basic oxide?

Accepted Answer

A) N 
B) P 
C) As 
D) Bi 
A) N 
B) P 
C) As 
D) Bi D

Question 3

-Which of the elements indicated on the above periodic table is least electronegative?

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 A

Question 4

Which one of the following compounds that contains a Group 6A element is least likely to exist?

Accepted Answer

A) OF2 
B) OF6 
C) SF4 
D) SF6 
A) OF2 
B) OF6 
C) SF4 
D) SF6

Question 5

-Which of the elements indicated on the above periodic table forms a common allotrope having molecular structure (3)?

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

What is not a characteristic of white phosphorus?

Accepted Answer

A) At temperatures less than 0°C it is converted to red phosphorus. 
B) It bursts into flames when exposed to air,thus it is stored under water. 
C) It has a low melting point (44°
C) . 
D) It is soluble in nonpolar solvent such as carbon disulfide CS2. 
A) At temperatures less than 0°C it is converted to red phosphorus. 
B) It bursts into flames when exposed to air,thus it is stored under water. 
C) It has a low melting point (44°
C) . 
D) It is soluble in nonpolar solvent such as carbon disulfide CS2.

Question 7

Which one of the following has a two-dimensional layer structure?

Accepted Answer

A) silica,SiO2 
B) zircon,ZrSiO4 
C) talc,Mg3(OH)2(Si4O10) 
D) tremolite asbestos,Ca2Mg5(Si4O11)(OH)2 
A) silica,SiO2 
B) zircon,ZrSiO4 
C) talc,Mg3(OH)2(Si4O10) 
D) tremolite asbestos,Ca2Mg5(Si4O11)(OH)2

Question 8

The fullerene C60 is an ________ (allotrope,isotope,isomer)of carbon.

Accepted Answer

Question 9

Among the main-group elements the number of semimetals is ________.

Accepted Answer

A) five 
B) six 
C) seven 
D) eight 
A) five 
B) six 
C) seven 
D) eight

Question 10

Which group 3A element has the largest liquid range of any known element?

Accepted Answer

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

Question 11

Ionization energy of main-group elements generally ________.

Accepted Answer

A) increases from left to right across a period and increases down a group 
B) increases from left to right across a period and decreases down a group 
C) decreases from left to right across a period and increases down a group 
D) decreases from left to right across a period and decreases down a group 
A) increases from left to right across a period and increases down a group 
B) increases from left to right across a period and decreases down a group 
C) decreases from left to right across a period and increases down a group 
D) decreases from left to right across a period and decreases down a group

Question 12

Which of the following elements forms the most ionic binary hydride?

Accepted Answer

A) K 
B) Mg 
C) S 
D) Cl 
A) K 
B) Mg 
C) S 
D) Cl

Question 13

-Which of the elements indicated on the above periodic table is the group 7A element with the largest atomic radius?

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 14

What is the molecular structure of phosphorous acid?

Accepted Answer

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

Question 15

How would one synthesize a perchlorate salt?

Accepted Answer

A) Electrolytic oxidation of a solution of chorate salt. 
B) Electrolytic oxidation of a solution of chorite salt. 
C) Electrolytic oxidation of a solution of hypochlorite salt. 
D) Oxidation of a solution of chlorate salt by a perbromate salt. 
A) Electrolytic oxidation of a solution of chorate salt. 
B) Electrolytic oxidation of a solution of chorite salt. 
C) Electrolytic oxidation of a solution of hypochlorite salt. 
D) Oxidation of a solution of chlorate salt by a perbromate salt.

Question 16

-What is the likely formula for the binary compound formed from the elements represented by letters B and D on the periodic table above?

Accepted Answer

A) BD 
B) B3D 
C) BD3 
D) B2D3 
A) BD 
B) B3D 
C) BD3 
D) B2D3

Question 17

Which group 6A element has the most negative electron affinity?

Accepted Answer

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

Question 18

In which compound is nitrogen in its lowest possible oxidation state?

Accepted Answer

A) NH3 
B) N2H4 
C) HNO2 
D) HNO3 
A) NH3 
B) N2H4 
C) HNO2 
D) HNO3

Question 19

What is the Haber process?

Accepted Answer

A) the isolation of N2 from the atmosphere 
B) the synthesis of ammonia,NH3 
C) the synthesis of nitric acid,HNO3 
D) the synthesis of hydrazine,N2H4 
A) the isolation of N2 from the atmosphere 
B) the synthesis of ammonia,NH3 
C) the synthesis of nitric acid,HNO3 
D) the synthesis of hydrazine,N2H4

Question 20

Which one of the following compounds exhibits the strongest hydrogen bonding between its molecules?

Accepted Answer

A) HF 
B) HCl 
C) HBr 
D) HI 
A) HF 
B) HCl 
C) HBr 
D) HI

Exam 19: The Main-Group Elements

What is the molecular structure of germanium that is used in semiconductors?

Which element of group 5A has the most basic oxide?

-Which of the elements indicated on the above periodic table is least electronegative?

Which one of the following compounds that contains a Group 6A element is least likely to exist?

-Which of the elements indicated on the above periodic table forms a common allotrope having molecular structure (3)?

What is not a characteristic of white phosphorus?

Which one of the following has a two-dimensional layer structure?

The fullerene C60 is an ________ (allotrope,isotope,isomer)of carbon.

Among the main-group elements the number of semimetals is ________.

Which group 3A element has the largest liquid range of any known element?

Ionization energy of main-group elements generally ________.

Which of the following elements forms the most ionic binary hydride?

-Which of the elements indicated on the above periodic table is the group 7A element with the largest atomic radius?

What is the molecular structure of phosphorous acid?

How would one synthesize a perchlorate salt?

-What is the likely formula for the binary compound formed from the elements represented by letters B and D on the periodic table above?

Which group 6A element has the most negative electron affinity?

In which compound is nitrogen in its lowest possible oxidation state?

What is the Haber process?

Which one of the following compounds exhibits the strongest hydrogen bonding between its molecules?

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

The fullerene C₆₀ is an ________ (allotrope,isotope,isomer)of carbon.