Question 1

What is the chemical equation for the production of hydrazine?

Accepted Answer

A) N2(g)+ 3 H2(g)→ 2 NH3(g) 
B) 2 NH3(aq)+ OCl-(aq)→ N2H4(aq)+ H2O(l)+ Cl-(aq) 
C) 4 NH3(g)+ 5 O2(g)→ 4 NO(g)+ 6 H2O(l) 
D) Au(s)+ 3 NO3-(aq)+ 6 H+(aq)+ 4 Cl-(aq)→ AuCl4-(aq)+ 3 NO2(g)+ H2O(l) 
A) N2(g)+ 3 H2(g)→ 2 NH3(g) 
B) 2 NH3(aq)+ OCl-(aq)→ N2H4(aq)+ H2O(l)+ Cl-(aq) 
C) 4 NH3(g)+ 5 O2(g)→ 4 NO(g)+ 6 H2O(l) 
D) Au(s)+ 3 NO3-(aq)+ 6 H+(aq)+ 4 Cl-(aq)→ AuCl4-(aq)+ 3 NO2(g)+ H2O(l)

Question 2

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 3

Which element of group 5A has the most basic oxide?

Accepted Answer

A) N 
B) P 
C) As 
D) Bi 
A) N 
B) P 
C) As 
D) Bi

Question 4

Which carbon containing compound is an inorganic compound?

Accepted Answer

A) C7H7NO2 
B) HCN  
C) CH3CO2H 
D) C6H5Br 
A) C7H7NO2 
B) HCN  
C) CH3CO2H 
D) C6H5Br

Question 5

In the picture representing binary hydride AHx,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A.If A is a second-period element,the oxidation state of hydrogen and the oxidation state of element A in the binary hydride shown below are

Accepted Answer

A) +1 and -2. 
B) +1 and -1. 
C) -1 and +1. 
D) -1 and +3. 
A) +1 and -2. 
B) +1 and -1. 
C) -1 and +1. 
D) -1 and +3.

Question 6

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 7

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 8

-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) Cl2 
B) O2 
C) P4 
D) S8 
A) Cl2 
B) O2 
C) P4 
D) S8

Question 9

In the following pictures representing binary hydrides AHS1U1B1xS1U1B0,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A.  
-The binary hydride shown in picture (2)is classified as

Accepted Answer

A) covalent. 
B) interstitial (metallic). 
C) ionic. 
D) None of these 
A) covalent. 
B) interstitial (metallic). 
C) ionic. 
D) None of these

Question 10

There are three isotopes of oxygen 16O,17O and 18O.Indicate the number of different types of isotopically substituted diatomic oxygen.

Accepted Answer

A) 3 
B) 5 
C) 6 
D) 9 
A) 3 
B) 5 
C) 6 
D) 9

Question 11

What is the formula and charge of the silicate anion represented by the picture below?

Accepted Answer

A) SiO22- 
B) SiO32- 
C) SiO44- 
D) Si4O128- 
A) SiO22- 
B) SiO32- 
C) SiO44- 
D) Si4O128-

Question 12

The silicate ion shown in the picture below combines with zirconium to form the mineral zircon.What is the formula and charge of the silicate ion?

Accepted Answer

A) SiO32- 
B) SiO44- 
C) Si4O104- 
D) Si4O116- 
A) SiO32- 
B) SiO44- 
C) Si4O104- 
D) Si4O116-

Question 13

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 14

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 15

Which alkali metal forms preferentially an oxide rather than a peroxide or superoxide?

Accepted Answer

A) Li 
B) Na 
C) K 
D) Mg 
A) Li 
B) Na 
C) K 
D) Mg

Question 16

Which of the hydrogen halide acids is used to etch glass?

Accepted Answer

A) HF 
B) HCl 
C) HBr 
D) HI 
A) HF 
B) HCl 
C) HBr 
D) HI

Question 17

Ionization energy of 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 18

-Which of the elements indicated on the above periodic table has the highest ionization energy?

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 19

Which one of the following is not a main group element?

Accepted Answer

A) Rb 
B) Ba 
C) Fe 
D) Ge 
A) Rb 
B) Ba 
C) Fe 
D) Ge

Question 20

-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

Exam 22: The Main-Group Elements

What is the chemical equation for the production of hydrazine?

What is the structure of rhombic sulfur?

Which element of group 5A has the most basic oxide?

Which carbon containing compound is an inorganic compound?

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

What statement is not consistent with the chemistry of lead?

-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)?

In the following pictures representing binary hydrides AHx,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A. -The binary hydride shown in picture (2)is classified as

There are three isotopes of oxygen 16O,17O and 18O.Indicate the number of different types of isotopically substituted diatomic oxygen.

What is the formula and charge of the silicate anion represented by the picture below?

The silicate ion shown in the picture below combines with zirconium to form the mineral zircon.What is the formula and charge of the silicate ion?

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

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

Which alkali metal forms preferentially an oxide rather than a peroxide or superoxide?

Which of the hydrogen halide acids is used to etch glass?

Ionization energy of main-group elements generally

-Which of the elements indicated on the above periodic table has the highest ionization energy?

Which one of the following is not a main group element?

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

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories 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

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Connections to Organic and Biological Chemistry

Filters

In the following pictures representing binary hydrides AH_x,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A. -The binary hydride shown in picture (2)is classified as

There are three isotopes of oxygen ¹⁶O,¹⁷O and ¹⁸O.Indicate the number of different types of isotopically substituted diatomic oxygen.