Question 1

-Which element indicated on the above periodic table forms a binary oxide with molecular structure (1)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 2

-Which of the elements indicated on the above periodic table is the group 5A element with the smallest 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 3

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

Accepted Answer

A) Na 
B) C 
C) N 
D) P 
A) Na 
B) C 
C) N 
D) P

Question 4

At 25°C the elements indicated by the shaded area in the following periodic table are all

Accepted Answer

A) diatomic molecules. 
B) gases. 
C) liquids. 
D) solids. 
A) diatomic molecules. 
B) gases. 
C) liquids. 
D) solids.

Question 5

What statement is inconsistent about fullerene?

Accepted Answer

A) It is an allotrope of carbon and the C60 form has soccer ball shape. 
B) The C60 form of fullerene is a good oxidizing agent. 
C) The C60 fullerene is a molecular substance. 
D) The C60 form of fullerene is soluble in nonpolar organic solvents. 
A) It is an allotrope of carbon and the C60 form has soccer ball shape. 
B) The C60 form of fullerene is a good oxidizing agent. 
C) The C60 fullerene is a molecular substance. 
D) The C60 form of fullerene is soluble in nonpolar organic solvents.

Question 6

What is the geometric structure of BF3 and the hybridization of the B atom?

Accepted Answer

A) trigonal planar and sp2 hybridization 
B) trigonal planar and sp3 hybridization 
C) pyramidal and sp2 hybridization 
D) tetrahedral and sp3 hybridization 
A) trigonal planar and sp2 hybridization 
B) trigonal planar and sp3 hybridization 
C) pyramidal and sp2 hybridization 
D) tetrahedral and sp3 hybridization

Question 7

What are the basic oxides of the following set Na2O,MgO,P4O10,SO3,and Cl2O7?

Accepted Answer

A) Na2O and MgO 
B) Na2O,MgO,and P4O10 
C) P4O10,SO3,and Cl2O7 
D) SO3 and Cl2O7 
A) Na2O and MgO 
B) Na2O,MgO,and P4O10 
C) P4O10,SO3,and Cl2O7 
D) SO3 and Cl2O7

Question 8

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

Accepted Answer

A) main-group metals. 
B) nonmetals. 
C) p-block elements. 
D) semimetals. 
A) main-group metals. 
B) nonmetals. 
C) p-block elements. 
D) semimetals.

Question 9

-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 10

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 11

Wollastonite,CaSiO3,is an example of a(n)________ (orthosilicate,single-strand silicate,double-strand silicate,and cyclic silicate).

Accepted Answer

single-str

Question 12

The percentage of carbon in the endohedral fullerene complexes KrC60 and XeC60 is ________%C and ________%C,respectively.

Accepted Answer

Question 13

What statement about nitrogen is not consistent with its chemistry?

Accepted Answer

A) It is a colorless,odorless,tasteless gas. 
B) It makes up 78% of the earth's atmosphere by volume. 
C) It is the most volatile component of liquid air with a boiling point of -196°C. 
D) It readily reacts with hydrogen to form NH3 that is used in fertilizers. 
A) It is a colorless,odorless,tasteless gas. 
B) It makes up 78% of the earth's atmosphere by volume. 
C) It is the most volatile component of liquid air with a boiling point of -196°C. 
D) It readily reacts with hydrogen to form NH3 that is used in fertilizers.

Question 14

What is not an appropriate method of making phosphoric acid?

Accepted Answer

A) PH3(g)+ 2 O2(g)→ H3PO4(l) 
B) PCl5(s)+ 4 H2O(l)→ H3PO4(aq)+ 5 HCl(aq) 
C) P4O10(s)+ 6 H2O(l)→ 4 H3PO4(aq) 
D) P4(s)+ 16 H2O(l)→ 4 H3PO4(aq)+ 2 H2(g) 
A) PH3(g)+ 2 O2(g)→ H3PO4(l) 
B) PCl5(s)+ 4 H2O(l)→ H3PO4(aq)+ 5 HCl(aq) 
C) P4O10(s)+ 6 H2O(l)→ 4 H3PO4(aq) 
D) P4(s)+ 16 H2O(l)→ 4 H3PO4(aq)+ 2 H2(g)

Question 15

What statement is inconsistent about diamond?

Accepted Answer

A) A covalent network structure in which each C atom uses sp3 hybrid orbitals. 
B) A tetrahedral array of σ bonds with bond lengths of 154 pm. 
C) The hardest known substance with the highest melting point for an element. 
D) When an electrical potential is applied diamond becomes a valuable semiconductor. 
A) A covalent network structure in which each C atom uses sp3 hybrid orbitals. 
B) A tetrahedral array of σ bonds with bond lengths of 154 pm. 
C) The hardest known substance with the highest melting point for an element. 
D) When an electrical potential is applied diamond becomes a valuable semiconductor.

Question 16

What is the oxidation number of carbon in CaC2?

Accepted Answer

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

Question 17

What is an appropriate method for the synthesis of phosphorus?

Accepted Answer

A) 2 Ca3(PO4)2(s)+ 10 C(s)+ 6 SiO2(s)+ heat → P4(g)+ 10 CO(g)+ 6 CaSiO3(l) 
B) 4 PCl5(s)+ heat → P4(g)+ 10 Cl2(g) 
C) 4 PH3(g)+ heat → P4(g)+ 6 H2(g) 
D) P4O6(s)+ heat → P4(g)+ 3 O2(g) 
A) 2 Ca3(PO4)2(s)+ 10 C(s)+ 6 SiO2(s)+ heat → P4(g)+ 10 CO(g)+ 6 CaSiO3(l) 
B) 4 PCl5(s)+ heat → P4(g)+ 10 Cl2(g) 
C) 4 PH3(g)+ heat → P4(g)+ 6 H2(g) 
D) P4O6(s)+ heat → P4(g)+ 3 O2(g)

Question 18

What statement is not representative of the chemistry of H2S?

Accepted Answer

A) It has a linear geometry. 
B) It is an extremely toxic substance. 
C) It is a weak diprotic acid. 
D) It is a weak reducing agent. 
A) It has a linear geometry. 
B) It is an extremely toxic substance. 
C) It is a weak diprotic acid. 
D) It is a weak reducing agent.

Question 19

Elements in period 2 of the periodic table differ markedly from the heavier elements in the same group due to their especially small ________ and high ________.

Accepted Answer

sizes,elec

Question 20

Mica cleaves into thin sheets because at the molecular level its structure is ________.

Accepted Answer

A) one dimensional 
B) two dimensional 
C) three dimensional 
D) None of these 
A) one dimensional 
B) two dimensional 
C) three dimensional 
D) None of these

Exam 19: The Main-Group Elements

-Which element indicated on the above periodic table forms a binary oxide with molecular structure (1)shown above?

-Which of the elements indicated on the above periodic table is the group 5A element with the smallest atomic radius?

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

At 25°C the elements indicated by the shaded area in the following periodic table are all

What statement is inconsistent about fullerene?

What is the geometric structure of BF3 and the hybridization of the B atom?

What are the basic oxides of the following set Na2O,MgO,P4O10,SO3,and Cl2O7?

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

-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)?

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?

Wollastonite,CaSiO3,is an example of a(n)________ (orthosilicate,single-strand silicate,double-strand silicate,and cyclic silicate).

The percentage of carbon in the endohedral fullerene complexes KrC60 and XeC60 is ________%C and ________%C,respectively.

What statement about nitrogen is not consistent with its chemistry?

What is not an appropriate method of making phosphoric acid?

What statement is inconsistent about diamond?

What is the oxidation number of carbon in CaC2?

What is an appropriate method for the synthesis of phosphorus?

What statement is not representative of the chemistry of H2S?

Elements in period 2 of the periodic table differ markedly from the heavier elements in the same group due to their especially small ________ and high ________.

Mica cleaves into thin sheets because at the molecular level its structure is ________.

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

What is the geometric structure of BF₃ and the hybridization of the B atom?

What are the basic oxides of the following set Na₂O,MgO,P₄O₁₀,SO₃,and Cl₂O₇?

Wollastonite,CaSiO₃,is an example of a(n)________ (orthosilicate,single-strand silicate,double-strand silicate,and cyclic silicate).

The percentage of carbon in the endohedral fullerene complexes KrC₆₀ and XeC₆₀ is %C and %C,respectively.

What is the oxidation number of carbon in CaC₂?

What statement is not representative of the chemistry of H₂S?

Elements in period 2 of the periodic table differ markedly from the heavier elements in the same group due to their especially small and high .