Question 1

Which of the following is not true?

Accepted Answer

A)  In diamond, each carbon atom is sp3-hybridized and linked to its four neighbors, with all electrons in C-C $\sigma$-bonds. 
B)  C60 is molecular and thus soluble in solvents like benzene. 
C)  Graphite consists of planar sheets of sp2-hybridized carbon atoms and electrons can move from one carbon to another through a delocalized $\pi$-network formed by the overlap of unhybridized p-orbitals. 
D)  Graphite is an electrically conducting solid. 
E)  Diamond is an excellent conductor of heat. 
A)  In diamond, each carbon atom is sp3-hybridized and linked to its four neighbors, with all electrons in C-C $\sigma$-bonds. 
B)  C60 is molecular and thus soluble in solvents like benzene. 
C)  Graphite consists of planar sheets of sp2-hybridized carbon atoms and electrons can move from one carbon to another through a delocalized $\pi$-network formed by the overlap of unhybridized p-orbitals. 
D)  Graphite is an electrically conducting solid. 
E)  Diamond is an excellent conductor of heat.

Question 2

Hydrogen can be made from fossil fuels in a series of two catalyzed reactions.One of these reactions,The re-forming reaction,Is

Accepted Answer

A)  Cu(s) + 2H+(aq) $\rightarrow$Cu2+(aq) + H2(g). 
B)  2H2O(l) $\rightarrow$2H2(g) + O2(g). 
C)  CH3OH(l)$\rightarrow$2H2(g) + CO(g). 
D)  CH4(g) + H2O(g) $\rightarrow$ CO(g) + 3H2(g). 
E)  Zn(s) + 2HCl(aq) $\rightarrow$ ZnCl2(aq) + H2(g). 
A)  Cu(s) + 2H+(aq) $\rightarrow$Cu2+(aq) + H2(g). 
B)  2H2O(l) $\rightarrow$2H2(g) + O2(g). 
C)  CH3OH(l)$\rightarrow$2H2(g) + CO(g). 
D)  CH4(g) + H2O(g) $\rightarrow$ CO(g) + 3H2(g). 
E)  Zn(s) + 2HCl(aq) $\rightarrow$ ZnCl2(aq) + H2(g).

Question 3

Which of the following can be extracted by hydrometallurgical reduction of their ions with hydrogen? Consult a table of standard potentials.

Accepted Answer

A)  Ni 
B)  Fe 
C)  Ag 
D)  Zn 
E)  Pb 
A)  Ni 
B)  Fe 
C)  Ag 
D)  Zn 
E)  Pb

Question 4

The first reaction in the Ostwald process for the synthesis of nitric acid is the

Accepted Answer

A)  oxidation of ammonia to nitrogen dioxide. 
B)  reduction of ammonia with copper. 
C)  decomposition of ammonia to nitrogen and hydrogen. 
D)  production of NH3(l). 
E)  oxidation of ammonia to nitrogen oxide. 
A)  oxidation of ammonia to nitrogen dioxide. 
B)  reduction of ammonia with copper. 
C)  decomposition of ammonia to nitrogen and hydrogen. 
D)  production of NH3(l). 
E)  oxidation of ammonia to nitrogen oxide.

Question 5

In ClF3, the number of regions of high electron concentration around the chlorine atom are

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
E)  2 
A)  3 
B)  4 
C)  5 
D)  6 
E)  2

Question 6

What happens to the saline hydrides when they are dissolved in water?

Accepted Answer

They reduc

Question 7

Bromine can be obtained from brines by oxidation of Br- by Cl2.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following are all allotropes?

Accepted Answer

A)  Graphite, diamond, and C60  
B)  Silicon, carbon, and C60  
C)  Boron carbide and carbon 
D)  Carbon monoxide and carbon dioxide 
E)  Silicon carbide, diamond, and C60  
A)  Graphite, diamond, and C60  
B)  Silicon, carbon, and C60  
C)  Boron carbide and carbon 
D)  Carbon monoxide and carbon dioxide 
E)  Silicon carbide, diamond, and C60

Question 9

Which of the following is a saline carbide?

Accepted Answer

A)  SiC 
B)  CaC2  
C)  Mo2C 
D)  Fe3C 
E)  W2C 
A)  SiC 
B)  CaC2  
C)  Mo2C 
D)  Fe3C 
E)  W2C

Question 10

When magnesium burns in air, the product(s)
Is (are)

Accepted Answer

A)  MgO. 
B)  MgO and Mg3N2.  
C)  MgAr. 
D)  MgCO3.  
E)  MgS and MgO. 
A)  MgO. 
B)  MgO and Mg3N2.  
C)  MgAr. 
D)  MgCO3.  
E)  MgS and MgO.

Question 11

Which of the following statements is false?

Accepted Answer

A)  Oxides of nonmetals are acidic. 
B)  Elements with intermediate ionization energies form amphoteric oxides. 
C)  Elements with low ionization energies commonly form ionic oxides. 
D)  Oxides of main-group metals are acidic. 
A)  Oxides of nonmetals are acidic. 
B)  Elements with intermediate ionization energies form amphoteric oxides. 
C)  Elements with low ionization energies commonly form ionic oxides. 
D)  Oxides of main-group metals are acidic.

Question 12

The stable forms of chlorine, bromine, And iodine at 25$\omicron$C and 1 atm are

Accepted Answer

A)  Cl2(g), Br2(g), and I2(g). 
B)  Cl2(g), Br2(l), and I2(s). 
C)  Cl2(g), Br2(l), and I2(l). 
D)  Cl2(g), Br(l), and I(s). 
E)  Cl2(g), Br(l), and I2(g). 
A)  Cl2(g), Br2(g), and I2(g). 
B)  Cl2(g), Br2(l), and I2(s). 
C)  Cl2(g), Br2(l), and I2(l). 
D)  Cl2(g), Br(l), and I(s). 
E)  Cl2(g), Br(l), and I2(g).

Question 13

Dinitrogen trioxide can be prepared by

Accepted Answer

A)  reacting hydrazine with water. 
B)  reacting ammonia with water. 
C)  dehydrating nitrous acid. 
D)  dehydrating nitric acid. 
E)  reacting N2O with O2. 
A)  reacting hydrazine with water. 
B)  reacting ammonia with water. 
C)  dehydrating nitrous acid. 
D)  dehydrating nitric acid. 
E)  reacting N2O with O2.

Question 14

Which of the following is the anhydride of sulfurous acid?

Accepted Answer

A)  SO2 
B)  SO3 
C)  SO42- 
D)  HSO4- 
A)  SO2 
B)  SO3 
C)  SO42- 
D)  HSO4-

Question 15

Circle the species that has the largest radius: CaS1U1P12+S1S1P0,SS1U1P12-S1S1P0,S,Cl.

Accepted Answer

The answer of Circle the species that has the largest...

Question 16

Beryllium and aluminum have similar properties because

Accepted Answer

A)  both have similar electron affinities. 
B)  both have almost identical ionization energies. 
C)  both ions are highly polarizing due to their small size and high charge. 
D)  both have virtually identical atomic radii. 
A)  both have similar electron affinities. 
B)  both have almost identical ionization energies. 
C)  both ions are highly polarizing due to their small size and high charge. 
D)  both have virtually identical atomic radii.

Question 17

AlS1U1B12S1U1B0OS1U1B13S1U1B0(s) dissolves in aqueous acid to produce

Accepted Answer

A)  Al(OHS1U1B12S1U1B0)S1U1B16S1U1B0S1U1P13+S1S1P0(aq). 
B)  Al(OH)S1U1B14S1U1B0S1U1P1-S1S1P0(aq) and OS1U1B12S1U1B0(g). 
C)  Al(OH)S1U1B14S1U1B0S1U1P1-S1S1P0(aq). 
D)  Al(OHS1U1B12S1U1B0)S1U1B16S1U1B0S1U1P13+S1S1P0(aq) and HS1U1B12S1U1B0(g). 
E)  Al(OH)S1U1B14S1U1B0S1U1P1-S1S1P0(aq) and HS1U1B12S1U1B0(g). 
A)  Al(OHS1U1B12S1U1B0)S1U1B16S1U1B0S1U1P13+S1S1P0(aq). 
B)  Al(OH)S1U1B14S1U1B0S1U1P1-S1S1P0(aq) and OS1U1B12S1U1B0(g). 
C)  Al(OH)S1U1B14S1U1B0S1U1P1-S1S1P0(aq). 
D)  Al(OHS1U1B12S1U1B0)S1U1B16S1U1B0S1U1P13+S1S1P0(aq) and HS1U1B12S1U1B0(g). 
E)  Al(OH)S1U1B14S1U1B0S1U1P1-S1S1P0(aq) and HS1U1B12S1U1B0(g).

Question 18

The anhydride of phosphoric acid is produced by the reaction

Accepted Answer

A)  H3PO4(aq) $\rarr$ HPO3(aq) + H2O(l). 
B)  2H3PO4(l) $\rarr$ H4P2O7(l) + H2O(l). 
C)  P4(s) + 3O2(g) $\rarr$ P4O6(s). 
D)  P4(s) + 5O2(g) $\rarr$ P4O10(s). 
E)  P4(g) + 3OH-(aq) + 3H2O(l) $\rarr$ 3H2PO2-(aq) + PH3(g). 
A)  H3PO4(aq) $\rarr$ HPO3(aq) + H2O(l). 
B)  2H3PO4(l) $\rarr$ H4P2O7(l) + H2O(l). 
C)  P4(s) + 3O2(g) $\rarr$ P4O6(s). 
D)  P4(s) + 5O2(g) $\rarr$ P4O10(s). 
E)  P4(g) + 3OH-(aq) + 3H2O(l) $\rarr$ 3H2PO2-(aq) + PH3(g).

Question 19

Both boric acid and nickel(II)chloride are weak acids in aqueous solutions.Explain.

Accepted Answer

Both form a Lewis ac

Question 20

State whether each of the following oxides is acidic,basic,or amphoteric.
P2O5
NO2
Sb2O3
As4O6
Bi2O3

Accepted Answer

P₂O₅,acidic; NO₂,acidic

Which of the following is not true?

Hydrogen can be made from fossil fuels in a series of two catalyzed reactions.One of these reactions,The re-forming reaction,Is

Which of the following can be extracted by hydrometallurgical reduction of their ions with hydrogen? Consult a table of standard potentials.

The first reaction in the Ostwald process for the synthesis of nitric acid is the

In ClF₃, the number of regions of high electron concentration around the chlorine atom are

What happens to the saline hydrides when they are dissolved in water?

Bromine can be obtained from brines by oxidation of Br^- by Cl₂.

Which of the following are all allotropes?

Which of the following is a saline carbide?

When magnesium burns in air, the product(s) Is (are)

Which of the following statements is false?

The stable forms of chlorine, bromine, And iodine at 25^$\omicron$C and 1 atm are

Dinitrogen trioxide can be prepared by

Which of the following is the anhydride of sulfurous acid?

Circle the species that has the largest radius: Ca²⁺,S^2-,S,Cl.

Beryllium and aluminum have similar properties because

Al₂O₃(s) dissolves in aqueous acid to produce

The anhydride of phosphoric acid is produced by the reaction

Both boric acid and nickel(II)chloride are weak acids in aqueous solutions.Explain.

State whether each of the following oxides is acidic,basic,or amphoteric. P₂O₅ NO₂ Sb₂O₃ As₄O₆ Bi₂O₃

Atoms

Molecules

States of Matter

Thermodynamics

Equilibrium

Reactions

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The D-Block Elements

Nuclear Chemistry

Organic Chemistry

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Exam 8: The Main-Group Elements

Which of the following is not true?

Hydrogen can be made from fossil fuels in a series of two catalyzed reactions.One of these reactions,The re-forming reaction,Is

Which of the following can be extracted by hydrometallurgical reduction of their ions with hydrogen? Consult a table of standard potentials.

The first reaction in the Ostwald process for the synthesis of nitric acid is the

In ClF3, the number of regions of high electron concentration around the chlorine atom are

What happens to the saline hydrides when they are dissolved in water?

Bromine can be obtained from brines by oxidation of Br- by Cl2.

Which of the following are all allotropes?

Which of the following is a saline carbide?

When magnesium burns in air, the product(s) Is (are)

Which of the following statements is false?

The stable forms of chlorine, bromine, And iodine at 25 ο\omicronο C and 1 atm are

Dinitrogen trioxide can be prepared by

Which of the following is the anhydride of sulfurous acid?

Circle the species that has the largest radius: Ca2+,S2-,S,Cl.

Beryllium and aluminum have similar properties because

Al2O3(s) dissolves in aqueous acid to produce

The anhydride of phosphoric acid is produced by the reaction

Both boric acid and nickel(II)chloride are weak acids in aqueous solutions.Explain.

State whether each of the following oxides is acidic,basic,or amphoteric. P2O5 NO2 Sb2O3 As4O6 Bi2O3

Atoms

Molecules

States of Matter

Thermodynamics

Equilibrium

Reactions

Kinetics

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

Filters

In ClF₃, the number of regions of high electron concentration around the chlorine atom are

Bromine can be obtained from brines by oxidation of Br^- by Cl₂.

The stable forms of chlorine, bromine, And iodine at 25^$\omicron$C and 1 atm are

Circle the species that has the largest radius: Ca²⁺,S^2-,S,Cl.

Al₂O₃(s) dissolves in aqueous acid to produce

State whether each of the following oxides is acidic,basic,or amphoteric. P₂O₅ NO₂ Sb₂O₃ As₄O₆ Bi₂O₃