Question 1

Which of the following cations is likely to be hydrated in compounds?

Accepted Answer

A) Rb+  
B) NH4+  
C) Ba2+  
D) K+  
E) Cs+  
A) Rb+  
B) NH4+  
C) Ba2+  
D) K+  
E) Cs+

Question 2

Pentane and 2,2-dimethylpropane have the formula C5H12 and therefore have the same boiling point.True or false?

Accepted Answer

A) True 
 B)False

Question 3

Estimate the density of magnesium oxide from its crystal structure.The radii of Mg2+ and O2- are 72 and 140 pm,respectively.

Accepted Answer

A) 3.51 g.cm-3  
B) 14.9 g.cm-3  
C) 21.1 g.cm-3  
D) 1.76 g.cm-3  
E) 0.878 g.cm-3  
A) 3.51 g.cm-3  
B) 14.9 g.cm-3  
C) 21.1 g.cm-3  
D) 1.76 g.cm-3  
E) 0.878 g.cm-3

Question 4

The boiling points of the Group 14 binary hydrides increase smoothly from CH4 to SnH4.True or false?

Accepted Answer

A) True 
 B)False

Question 5

The atomic radius of zinc is 137 pm.Estimate its density,given that the metal has a close-packed structure.

Accepted Answer

A) 7.47 g.cm-3  
B) 10.2 g.cm-3  
C) 14.0 g.cm-3  
D) 4.49 g.cm-3  
E) 19.2 g.cm-3  
A) 7.47 g.cm-3  
B) 10.2 g.cm-3  
C) 14.0 g.cm-3  
D) 4.49 g.cm-3  
E) 19.2 g.cm-3

Question 6

Which of the following ions forms only anhydrous salts?

Accepted Answer

A) Ba2+ 
B) Na+ 
C) Li+ 
D) La3+ 
E) K+ 
A) Ba2+ 
B) Na+ 
C) Li+ 
D) La3+ 
E) K+

Question 7

Calculate the size of the octahedral holes in the NaCl structure.The ionic radii of Na+ and Cl- are 102 and 181 pm,respectively.

Accepted Answer

A) 142 pm 
B) 181 pm 
C) 102 pm 
D) 91 pm 
E) 75 pm 
A) 142 pm 
B) 181 pm 
C) 102 pm 
D) 91 pm 
E) 75 pm

Question 8

Both ZnS and CaF2 have a face-centered cubic unit cell where the S2- and Ca2+ ions are closest packed in each structure.Which of the following is true?

Accepted Answer

A) There are 4 tetrahedral holes empty in each structure. 
B) In both compounds,one-half of the tetrhedral holes are filled. 
C) In both compounds,all the tetrhedral holes are filled. 
D) In ZnS,one-half of the tetrahedral holes are filled by Zn2+ ions,whereas in CaF2 all the tetrahedral holes are filled with F- ions. 
E) There are 8 Zn2+ ions and 4 F- ions in the unit cell. 
A) There are 4 tetrahedral holes empty in each structure. 
B) In both compounds,one-half of the tetrhedral holes are filled. 
C) In both compounds,all the tetrhedral holes are filled. 
D) In ZnS,one-half of the tetrahedral holes are filled by Zn2+ ions,whereas in CaF2 all the tetrahedral holes are filled with F- ions. 
E) There are 8 Zn2+ ions and 4 F- ions in the unit cell.

Question 9

The solid ZnS has a radius ratio of 0.45 and adopts the zinc-blende structure.What is the coordination number of Zn in ZnS?

Accepted Answer

A) 12 
B) 4 
C) 8 
D) 2 
E) 6 
A) 12 
B) 4 
C) 8 
D) 2 
E) 6

Question 10

If the interaction between two species is proportional to 1/r3,which of the following is likely involved?

Accepted Answer

A) Chloromethane molecules in the liquid phase 
B) Ions in an ionic solid 
C) Bromine molecules in the liquid phase 
D) Chloromethane molecules in the solid phase 
E) Na+ and H2O 
A) Chloromethane molecules in the liquid phase 
B) Ions in an ionic solid 
C) Bromine molecules in the liquid phase 
D) Chloromethane molecules in the solid phase 
E) Na+ and H2O

Question 11

The boiling points of the Group 15 binary hydrides increase smoothly from NH3 to SbH3.True or false?

Accepted Answer

A) True 
 B)False

Question 12

In the unit cell of CaF2,half of the tetrahedral holes are occupied by F- ions.True or false?

Accepted Answer

A) True 
 B)False

Question 13

Order the following cubic unit cells from highest percentage of empty space to lowest: body-centered,primitive,face-centered.

Accepted Answer

A) primitive > body-centered > face-centered 
B) body-centered > primitive > face-centered 
C) primitive > face-centered > body-centered 
D) body-centered > face-centered >primitive 
E) face-centered > body centered > primitive 
A) primitive > body-centered > face-centered 
B) body-centered > primitive > face-centered 
C) primitive > face-centered > body-centered 
D) body-centered > face-centered >primitive 
E) face-centered > body centered > primitive

Question 14

What are all the intermolecular forces that are responsible for the existence of ice?

Accepted Answer

A) Dipole-dipole and London forces 
B) London forces 
C) Dipole-dipole,London forces,and hydrogen bonding 
D) Dipole-dipole and ion-ion 
E) Hydrogen bonding and dipole-dipole 
A) Dipole-dipole and London forces 
B) London forces 
C) Dipole-dipole,London forces,and hydrogen bonding 
D) Dipole-dipole and ion-ion 
E) Hydrogen bonding and dipole-dipole

Question 15

Match between columns
                        Premises: The boiling point of cis-dichloroethene is higher than that of trans-dichloroethene
Sodium salts are commonly hydrated.
Helium can be liquefied.
NHS1U1B13S1U1B0 has a higher boiling point than PHS1U1B13S1U1B0.

Accepted Answer

The Answer of London dispersion and hydrogen bonding and ion-dipole is...

Which of the following cations is likely to be hydrated in compounds?

Pentane and 2,2-dimethylpropane have the formula C₅H₁₂ and therefore have the same boiling point.True or false?

Estimate the density of magnesium oxide from its crystal structure.The radii of Mg²⁺ and O²^- are 72 and 140 pm,respectively.

The boiling points of the Group 14 binary hydrides increase smoothly from CH₄ to SnH₄.True or false?

The atomic radius of zinc is 137 pm.Estimate its density,given that the metal has a close-packed structure.

Which of the following ions forms only anhydrous salts?

Calculate the size of the octahedral holes in the NaCl structure.The ionic radii of Na⁺ and Cl^- are 102 and 181 pm,respectively.

Both ZnS and CaF₂ have a face-centered cubic unit cell where the S^2- and Ca²⁺ ions are closest packed in each structure.Which of the following is true?

The solid ZnS has a radius ratio of 0.45 and adopts the zinc-blende structure.What is the coordination number of Zn in ZnS?

If the interaction between two species is proportional to 1/r³,which of the following is likely involved?

The boiling points of the Group 15 binary hydrides increase smoothly from NH₃ to SbH₃.True or false?

In the unit cell of CaF₂,half of the tetrahedral holes are occupied by F^- ions.True or false?

Order the following cubic unit cells from highest percentage of empty space to lowest: body-centered,primitive,face-centered.

What are all the intermolecular forces that are responsible for the existence of ice?

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

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 Main Group Elements

The Elements: The D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

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Exam 6: Liquids and Solids

Which of the following cations is likely to be hydrated in compounds?

Pentane and 2,2-dimethylpropane have the formula C5H12 and therefore have the same boiling point.True or false?

Estimate the density of magnesium oxide from its crystal structure.The radii of Mg2+ and O2- are 72 and 140 pm,respectively.

The boiling points of the Group 14 binary hydrides increase smoothly from CH4 to SnH4.True or false?

The atomic radius of zinc is 137 pm.Estimate its density,given that the metal has a close-packed structure.

Which of the following ions forms only anhydrous salts?

Calculate the size of the octahedral holes in the NaCl structure.The ionic radii of Na+ and Cl- are 102 and 181 pm,respectively.

Both ZnS and CaF2 have a face-centered cubic unit cell where the S2- and Ca2+ ions are closest packed in each structure.Which of the following is true?

The solid ZnS has a radius ratio of 0.45 and adopts the zinc-blende structure.What is the coordination number of Zn in ZnS?

If the interaction between two species is proportional to 1/r3,which of the following is likely involved?

The boiling points of the Group 15 binary hydrides increase smoothly from NH3 to SbH3.True or false?

In the unit cell of CaF2,half of the tetrahedral holes are occupied by F- ions.True or false?

Order the following cubic unit cells from highest percentage of empty space to lowest: body-centered,primitive,face-centered.

What are all the intermolecular forces that are responsible for the existence of ice?

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

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 Main Group Elements

The Elements: The D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

Pentane and 2,2-dimethylpropane have the formula C₅H₁₂ and therefore have the same boiling point.True or false?

Estimate the density of magnesium oxide from its crystal structure.The radii of Mg²⁺ and O²^- are 72 and 140 pm,respectively.

The boiling points of the Group 14 binary hydrides increase smoothly from CH₄ to SnH₄.True or false?

Calculate the size of the octahedral holes in the NaCl structure.The ionic radii of Na⁺ and Cl^- are 102 and 181 pm,respectively.

Both ZnS and CaF₂ have a face-centered cubic unit cell where the S^2- and Ca²⁺ ions are closest packed in each structure.Which of the following is true?

If the interaction between two species is proportional to 1/r³,which of the following is likely involved?

The boiling points of the Group 15 binary hydrides increase smoothly from NH₃ to SbH₃.True or false?

In the unit cell of CaF₂,half of the tetrahedral holes are occupied by F^- ions.True or false?