Question 1

What statement is not consistent with the chemistry of lead?

Accepted Answer

A) It has the highest density of the group 4A elements. 
B) It is commonly used as a fuel additive in gasoline to boost the octane rating. 
C) It is obtained from its ore galena (PbS)by roasting in air and then by reduction with carbon monoxide. 
D) It is used in making pipes,cables,paint pigments and electrodes for storage batteries. 
A) It has the highest density of the group 4A elements. 
B) It is commonly used as a fuel additive in gasoline to boost the octane rating. 
C) It is obtained from its ore galena (PbS)by roasting in air and then by reduction with carbon monoxide. 
D) It is used in making pipes,cables,paint pigments and electrodes for storage batteries.

Question 2

The most stable allotrope of sulfur is S8.What are the approximate bond angles in S8?

Accepted Answer

Question 3

Why is H3PO4 a weak triprotic acid whereas H3PO3 is a weak diprotic acid?

Accepted Answer

All three protons in H₃PO₄ are bonded to o

Question 4

-Which of the elements indicated on the above periodic table forms a common allotrope having molecular structure (2)?

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 5

Which M3+ ion of group 3A elements is the easiest to reduce?

Accepted Answer

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

Question 6

What statement is not consistent with the chemistry of tin?

Accepted Answer

A) It is abstracted from the mineral cassiterite by reduction of the oxide with carbon. 
B) It is an important component of alloys such as bronze,pewter,and some solders. 
C) It is a relatively abundant ore within the earth's crust. 
D) It is used as a protective coating over steel in making tin cans. 
A) It is abstracted from the mineral cassiterite by reduction of the oxide with carbon. 
B) It is an important component of alloys such as bronze,pewter,and some solders. 
C) It is a relatively abundant ore within the earth's crust. 
D) It is used as a protective coating over steel in making tin cans.

Question 7

Metallic character for the 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 8

Elements in group 3A of the periodic table have the valence electron configuration ________.

Accepted Answer

The answer of Elements in group 3A of the periodic...

Question 9

Second row elements differ from heavier elements in all of the following ways except:

Accepted Answer

A) Atoms of second row elements are smaller. 
B) Atoms of second row elements have higher electronegativities. 
C) Heavier elements commonly form multiple bonds while second row elements cannot. 
D) Heavier elements have electrons in d orbitals while second row elements do not. 
A) Atoms of second row elements are smaller. 
B) Atoms of second row elements have higher electronegativities. 
C) Heavier elements commonly form multiple bonds while second row elements cannot. 
D) Heavier elements have electrons in d orbitals while second row elements do not.

Question 10

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

Accepted Answer

A) main-group elements. 
B) p-block elements. 
C) s-block elements. 
D) transition elements. 
A) main-group elements. 
B) p-block elements. 
C) s-block elements. 
D) transition elements.

Question 11

The infinitely extended silicate ion shown in the picture below combines with calcium and magnesium to form the mineral diopside.What is the formula and charge of the repeating unit of the silicate ion?

Accepted Answer

A) SiO32- 
B) Si2O64- 
C) Si3O108- 
D) Si6O2424- 
A) SiO32- 
B) Si2O64- 
C) Si3O108- 
D) Si6O2424-

Question 12

The two-dimensional layer silicate ion shown in the picture below combines with magnesium and hydroxide ions to form talc.What is the formula and charge of the repeating unit of the silicate ion?

Accepted Answer

A) SiO32- 
B) Si4O104- 
C) Si6O156- 
D) Si18O5028- 
A) SiO32- 
B) Si4O104- 
C) Si6O156- 
D) Si18O5028-

Question 13

What is not an appropriate method for the isolation of elemental boron?

Accepted Answer

A) refluxing borax with sodium peroxide 
B) high temperature reduction of B2O3 with magnesium 
C) high temperature reduction of BBr3 with hydrogen over a Ta wire 
D) electrolytic reduction of aqueous B(OH)3 
A) refluxing borax with sodium peroxide 
B) high temperature reduction of B2O3 with magnesium 
C) high temperature reduction of BBr3 with hydrogen over a Ta wire 
D) electrolytic reduction of aqueous B(OH)3

Question 14

Which carbon containing compound is an inorganic compound?

Accepted Answer

A) C7H7NO2 
B) CO2 
C) CH3CO2H 
D) C6H5CN 
A) C7H7NO2 
B) CO2 
C) CH3CO2H 
D) C6H5CN

Question 15

-Which element indicated on the above periodic table forms a binary oxide with molecular structure (4)shown above?

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 16

Which of the halogens forms more than one perhalic acid?

Accepted Answer

A) F 
B) Cl 
C) Br 
D) I 
A) F 
B) Cl 
C) Br 
D) I

Question 17

Given that hypohalous acids form by the following reaction
X2(aq)+ H2O(l)⇌ HOX(aq)+ H+(aq)+ X-(aq)
Which of the following changes will increase the yield of HOX?

Accepted Answer

A) add water 
B) add X- 
C) decrease the pH 
D) increase the pH 
A) add water 
B) add X- 
C) decrease the pH 
D) increase the pH

Question 18

What is the structure of rhombic sulfur?

Accepted Answer

A) crown shaped S8 molecules 
B) discrete S atoms 
C) discrete S2 molecules 
D) polymeric Sn chains 
A) crown shaped S8 molecules 
B) discrete S atoms 
C) discrete S2 molecules 
D) polymeric Sn chains

Question 19

Compared to the terminal B-H bonds the bridging H-B bonds in B2H6 are

Accepted Answer

A) longer and stronger. 
B) longer and weaker. 
C) shorter and stronger. 
D) shorter and weaker. 
A) longer and stronger. 
B) longer and weaker. 
C) shorter and stronger. 
D) shorter and weaker.

Question 20

Using principles discussed in chapters 15 and 19,determine which of the following is the strongest acid.

Accepted Answer

A) HClO2 
B) HClO3 
C) HBrO3 
D) HIO3 
A) HClO2 
B) HClO3 
C) HBrO3 
D) HIO3

Exam 19: The Main-Group Elements

What statement is not consistent with the chemistry of lead?

The most stable allotrope of sulfur is S8.What are the approximate bond angles in S8?

Why is H3PO4 a weak triprotic acid whereas H3PO3 is a weak diprotic acid?

-Which of the elements indicated on the above periodic table forms a common allotrope having molecular structure (2)?

Which M3+ ion of group 3A elements is the easiest to reduce?

What statement is not consistent with the chemistry of tin?

Metallic character for the main group elements generally ________.

Elements in group 3A of the periodic table have the valence electron configuration ________.

Second row elements differ from heavier elements in all of the following ways except:

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

The infinitely extended silicate ion shown in the picture below combines with calcium and magnesium to form the mineral diopside.What is the formula and charge of the repeating unit of the silicate ion?

The two-dimensional layer silicate ion shown in the picture below combines with magnesium and hydroxide ions to form talc.What is the formula and charge of the repeating unit of the silicate ion?

What is not an appropriate method for the isolation of elemental boron?

Which carbon containing compound is an inorganic compound?

-Which element indicated on the above periodic table forms a binary oxide with molecular structure (4)shown above?

Which of the halogens forms more than one perhalic acid?

Given that hypohalous acids form by the following reaction X2(aq)+ H2O(l)⇌ HOX(aq)+ H+(aq)+ X-(aq) Which of the following changes will increase the yield of HOX?

What is the structure of rhombic sulfur?

Compared to the terminal B-H bonds the bridging H-B bonds in B2H6 are

Using principles discussed in chapters 15 and 19,determine which of the following is the strongest acid.

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 most stable allotrope of sulfur is S₈.What are the approximate bond angles in S₈?

Why is H₃PO₄ a weak triprotic acid whereas H₃PO₃ is a weak diprotic acid?

Which M³⁺ ion of group 3A elements is the easiest to reduce?

Given that hypohalous acids form by the following reaction X₂(aq)+ H₂O(l)⇌ HOX(aq)+ H⁺(aq)+ X^-(aq) Which of the following changes will increase the yield of HOX?

Compared to the terminal B-H bonds the bridging H-B bonds in B₂H₆are