Question 1

What are the basic oxides of the following set Cs2O,CaO,P4O10,SO3,and I2O7?

Accepted Answer

A) Cs2O and CaO 
B) Cs2O,CaO,and P4O10 
C) P4O10,SO3,and I2O7 
D) SO3 and I2O7 
A) Cs2O and CaO 
B) Cs2O,CaO,and P4O10 
C) P4O10,SO3,and I2O7 
D) SO3 and I2O7

Question 2

What is the oxidation number of carbon in CaC2?

Accepted Answer

A) +4 
B) 0 
C) -1 
D) -2 
A) +4 
B) 0 
C) -1 
D) -2

Question 3

What are appropriate methods for the generation of H2S? Reaction 1: FeS(s)+ 2 H+(aq)→ H2S(g)+ Fe2+(aq)
Reaction 2: CH3C(CS)NH2(aq)+ H2O(l)+ heat → CH3(CO)NH2(aq)+ H2S(aq)
Reaction 3: 3 S(g)+ 2 H2O(g)→ SO2(g)+ 2 H2S(g)
Reaction 4: 2 SO2(g)+ 2 H2O(g)→ 2 H2S(g)+ 3 O2(g)

Accepted Answer

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

Question 4

Commercially oxygen is usually obtained by

Accepted Answer

A) decomposition of mercury(II)oxide. 
B) decomposition of potassium chlorate. 
C) electrolytic decomposition of water. 
D) fractional distillation of air. 
A) decomposition of mercury(II)oxide. 
B) decomposition of potassium chlorate. 
C) electrolytic decomposition of water. 
D) fractional distillation of air.

Question 5

-Which of these molecules is most likely to contain good π overlap of p orbitals,as shown in figure (a),rather than poor π overlap of p orbitals,as shown in figure (b)?

Accepted Answer

A) CO2 
B) SiO2 
C) GeO2 
D) SnO2 
A) CO2 
B) SiO2 
C) GeO2 
D) SnO2

Question 6

Which of the following species has its N atom or atoms in the -1 oxidation state?

Accepted Answer

A) N2H4 
B) NH2OH 
C) N2O 
D) HONO 
A) N2H4 
B) NH2OH 
C) N2O 
D) HONO

Question 7

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 acid?

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 8

-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 9

If the anhydride of nitrous acid (HNO2)is N2O3 then what is the anhydride of nitric acid (HNO3)?

Accepted Answer

A) NO2 
B) NO3 
C) N2O3 
D) N2O5 
A) NO2 
B) NO3 
C) N2O3 
D) N2O5

Question 10

Which one of the following elements forms the most acidic binary oxide?

Accepted Answer

A) Ne 
B) Cu 
C) N 
D) Li 
A) Ne 
B) Cu 
C) N 
D) Li

Question 11

Hydrogen,H2,has a very low boiling point.What is the force that must be overcome in order to boil hydrogen?

Accepted Answer

A) dipole-dipole 
B) H-H covalent bonding 
C) hydrogen bonding 
D) London dispersion 
A) dipole-dipole 
B) H-H covalent bonding 
C) hydrogen bonding 
D) London dispersion

Question 12

Which of the following elements is a liquid at room temperature?

Accepted Answer

A) fluorine 
B) chlorine 
C) bromine 
D) iodine 
A) fluorine 
B) chlorine 
C) bromine 
D) iodine

Question 13

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 14

Which one of the following is a pseudohalide?

Accepted Answer

A) CO32- 
B) OH- 
C) CN- 
D) SO42- 
A) CO32- 
B) OH- 
C) CN- 
D) SO42-

Question 15

What is responsible for the brownish colored gas when copper dissolves in nitric acid?

Accepted Answer

A) 2 NO(g)+ O2(g)→ 2 NO2(g) 
B) 2 N2(g)+ O2(g)→ 2 NO(g) 
C) NH4NO3(l)→ N2O(g)+ 2 H2O(g) 
D) 2 NO2(g)→ N2O4(g) 
A) 2 NO(g)+ O2(g)→ 2 NO2(g) 
B) 2 N2(g)+ O2(g)→ 2 NO(g) 
C) NH4NO3(l)→ N2O(g)+ 2 H2O(g) 
D) 2 NO2(g)→ N2O4(g)

Question 16

What is not a key step in the production of nitric acid by the Ostwald process?

Accepted Answer

A) 4 NH3(g)+ 5 O2(g)→ 4 NO(g)+ 6 H2O(l) 
B) 2 NO(g)+ O2(g)→ 2 NO2(g) 
C) 3 NO2(g)+ H2O(l)→ 2 HNO3(aq)+ NO(g) 
D) N2(g)+ O2(g)→ 2 NO(g) 
A) 4 NH3(g)+ 5 O2(g)→ 4 NO(g)+ 6 H2O(l) 
B) 2 NO(g)+ O2(g)→ 2 NO2(g) 
C) 3 NO2(g)+ H2O(l)→ 2 HNO3(aq)+ NO(g) 
D) N2(g)+ O2(g)→ 2 NO(g)

Question 17

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

Accepted Answer

A) Cs 
B) N 
C) Si 
D) Ge 
A) Cs 
B) N 
C) Si 
D) Ge

Question 18

The ratio of oxygen atoms to silicon atoms in orthosilicate,single-strand silicates,double-strand silicates,and cyclic silicates is ________,________,________,and ________,respectively.

Accepted Answer

4:1,3:1,2.

Question 19

Dissolving 0.040 mole of which of the following in enough water to make 0.220 L of solution would result in a solution with the highest pH?

Accepted Answer

A) LiH 
B) SrH2 
C) NH3 
D) PH3 
A) LiH 
B) SrH2 
C) NH3 
D) PH3

Question 20

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.

Exam 22: The Main-Group Elements

What are the basic oxides of the following set Cs2O,CaO,P4O10,SO3,and I2O7?

What is the oxidation number of carbon in CaC2?

What are appropriate methods for the generation of H2S? Reaction 1: FeS(s)+ 2 H+(aq)→ H2S(g)+ Fe2+(aq) Reaction 2: CH3C(CS)NH2(aq)+ H2O(l)+ heat → CH3(CO)NH2(aq)+ H2S(aq) Reaction 3: 3 S(g)+ 2 H2O(g)→ SO2(g)+ 2 H2S(g) Reaction 4: 2 SO2(g)+ 2 H2O(g)→ 2 H2S(g)+ 3 O2(g)

Commercially oxygen is usually obtained by

-Which of these molecules is most likely to contain good π overlap of p orbitals,as shown in figure (a),rather than poor π overlap of p orbitals,as shown in figure (b)?

Which of the following species has its N atom or atoms in the -1 oxidation state?

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 acid?

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

If the anhydride of nitrous acid (HNO2)is N2O3 then what is the anhydride of nitric acid (HNO3)?

Which one of the following elements forms the most acidic binary oxide?

Hydrogen,H2,has a very low boiling point.What is the force that must be overcome in order to boil hydrogen?

Which of the following elements is a liquid at room temperature?

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

Which one of the following is a pseudohalide?

What is responsible for the brownish colored gas when copper dissolves in nitric acid?

What is not a key step in the production of nitric acid by the Ostwald process?

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

The ratio of oxygen atoms to silicon atoms in orthosilicate,single-strand silicates,double-strand silicates,and cyclic silicates is ________,________,________,and ________,respectively.

Dissolving 0.040 mole of which of the following in enough water to make 0.220 L of solution would result in a solution with the highest pH?

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

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What are the basic oxides of the following set Cs₂O,CaO,P₄O₁₀,SO₃,and I₂O₇?

What is the oxidation number of carbon in CaC₂?

If the anhydride of nitrous acid (HNO₂)is N₂O₃ then what is the anhydride of nitric acid (HNO₃)?

Hydrogen,H₂,has a very low boiling point.What is the force that must be overcome in order to boil hydrogen?

The ratio of oxygen atoms to silicon atoms in orthosilicate,single-strand silicates,double-strand silicates,and cyclic silicates is ,,,and ,respectively.