Question 1

Which group of elements are found as diatomic molecules?

Accepted Answer

A) alkali metals 
B) alkaline earth metals 
C) halogens 
D) noble gases 
A) alkali metals 
B) alkaline earth metals 
C) halogens 
D) noble gases

Question 2

What statement is not consistent with the chemistry of tin?

Accepted Answer

A) It is abstracted from the mineral cassiterite by reduction of the oxide with carbon. 
B) It is an important component of alloys such as bronze,pewter,and some solders. 
C) It is a relatively abundant ore within the earth's crust. 
D) It is used as a protective coating over steel in making tin cans. 
A) It is abstracted from the mineral cassiterite by reduction of the oxide with carbon. 
B) It is an important component of alloys such as bronze,pewter,and some solders. 
C) It is a relatively abundant ore within the earth's crust. 
D) It is used as a protective coating over steel in making tin cans.

Question 3

-Which element shown on the periodic table above forms an interstitial binary hydride with the formula MXx?

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 4

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

Accepted Answer

A) metals. 
B) nonmetals. 
C) p-block elements. 
D) s-block elements. 
A) metals. 
B) nonmetals. 
C) p-block elements. 
D) s-block elements.

Question 5

Which one of the following binary oxides is the most covalent?

Accepted Answer

A) Li2O 
B) BaO 
C) SiO2 
D) Br2O5 
A) Li2O 
B) BaO 
C) SiO2 
D) Br2O5

Question 6

Which one of the following carbides is not a correct formula?

Accepted Answer

A) CaC2 
B) Fe3C 
C) SiC 
D) None of these 
A) CaC2 
B) Fe3C 
C) SiC 
D) None of these

Question 7

What is the molecular structure of phosphorous acid?

Accepted Answer

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

Question 8

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 weakest base?

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 9

In which compound is phosphorus in its lowest oxidation state?

Accepted Answer

A) P2O5 
B) PBr3 
C) PH3 
D) PCl5 
A) P2O5 
B) PBr3 
C) PH3 
D) PCl5

Question 10

Each of the pictures (a)-(d)represents one of the following substances at 25°C: potassium,fluorine,iodine,potassium fluoride,not necessarily in that order.  
-Which picture corresponds to iodine?

Accepted Answer

A) picture (a) 
B) picture (b) 
C) picture (c) 
D) picture (d) 
A) picture (a) 
B) picture (b) 
C) picture (c) 
D) picture (d)

Question 11

Among the main-group elements the number of semimetals is

Accepted Answer

A) five. 
B) six. 
C) seven. 
D) eight. 
A) five. 
B) six. 
C) seven. 
D) eight.

Question 12

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 13

What is the top chemical compound produced in the United States?

Accepted Answer

A) Cl2 
B) NI3 
C) NaBr 
D) H2SO4 
A) Cl2 
B) NI3 
C) NaBr 
D) H2SO4

Question 14

Which statement is inconsistent with the chemistry of the noble gases?

Accepted Answer

A) Both helium and radon are radioactive. 
B) Helium and neon are both lighter than air. 
C) Neon and argon are used in decorative or designer lights. 
D) Xenon and krypton react with fluorine to form fluorides. 
A) Both helium and radon are radioactive. 
B) Helium and neon are both lighter than air. 
C) Neon and argon are used in decorative or designer lights. 
D) Xenon and krypton react with fluorine to form fluorides.

Question 15

Which is not a chemical reaction of the alkali metal sodium?

Accepted Answer

A) 4 Na(s)+ 2 O2(g)→ 2 Na2O(s)+ Na2O2(s) 
B) 2 Na(s)+ 2 NH3(l)→ 2 NaNH2(sol)+ H2(g) 
C) 2 Na(s)+ Cl2(g)→ 2 NaCl(s) 
D) 2 Na(s)+ 2 H2O(l)→ 2 NaOH(aq)+ H2(g) 
A) 4 Na(s)+ 2 O2(g)→ 2 Na2O(s)+ Na2O2(s) 
B) 2 Na(s)+ 2 NH3(l)→ 2 NaNH2(sol)+ H2(g) 
C) 2 Na(s)+ Cl2(g)→ 2 NaCl(s) 
D) 2 Na(s)+ 2 H2O(l)→ 2 NaOH(aq)+ H2(g)

Question 16

What statement about nitric acid is not true?

Accepted Answer

A) It is a strong oxidizing agent. 
B) It is one of the more common strong acids and is essentially 100% dissociated in water. 
C) It often has a yellow color due to the formation of NO2. 
D) Its anhydride is N2O3. 
A) It is a strong oxidizing agent. 
B) It is one of the more common strong acids and is essentially 100% dissociated in water. 
C) It often has a yellow color due to the formation of NO2. 
D) Its anhydride is N2O3.

Question 17

In which set are all compounds considered to be covalent binary hydrides?

Accepted Answer

A) CsH,KH,CaH2,BaH2 
B) CaH2,SrH2,AlH3,SiH4 
C) BeH2,B2H6,GeH4,PH3 
D) CaH2,AlH3,SiH4,H2S 
A) CsH,KH,CaH2,BaH2 
B) CaH2,SrH2,AlH3,SiH4 
C) BeH2,B2H6,GeH4,PH3 
D) CaH2,AlH3,SiH4,H2S

Question 18

Which one of the following has a two-dimensional layer structure?

Accepted Answer

A) silica,SiO2 
B) zircon,ZrSiO4 
C) talc,Mg3(OH)2(Si4O10) 
D) tremolite asbestos,Ca2Mg5(Si4O11)(OH)2 
A) silica,SiO2 
B) zircon,ZrSiO4 
C) talc,Mg3(OH)2(Si4O10) 
D) tremolite asbestos,Ca2Mg5(Si4O11)(OH)2

Question 19

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

Accepted Answer

A) Fr 
B) Ra 
C) Th 
D) C 
A) Fr 
B) Ra 
C) Th 
D) C

Question 20

What are the signs are expected for the entropy change ΔS and free energy change ΔG for the reaction below? N2H4(l)+ N2O4(l)→ 3 N2(g)+ 4 H2O(g)ΔH = -1049 kJ

Accepted Answer

A) ΔS = + and ΔG = + 
B) ΔS = + and ΔG = - 
C) ΔS = - and ΔG = + 
D) ΔS = - and ΔG = - 
A) ΔS = + and ΔG = + 
B) ΔS = + and ΔG = - 
C) ΔS = - and ΔG = + 
D) ΔS = - and ΔG = -

Exam 22: The Main-Group Elements

Which group of elements are found as diatomic molecules?

What statement is not consistent with the chemistry of tin?

-Which element shown on the periodic table above forms an interstitial binary hydride with the formula MXx?

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

Which one of the following binary oxides is the most covalent?

Which one of the following carbides is not a correct formula?

What is the molecular structure of phosphorous acid?

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 weakest base?

In which compound is phosphorus in its lowest oxidation state?

Each of the pictures (a)-(d)represents one of the following substances at 25°C: potassium,fluorine,iodine,potassium fluoride,not necessarily in that order. -Which picture corresponds to iodine?

Among the main-group elements the number of semimetals is

What is not an appropriate method of making phosphoric acid?

What is the top chemical compound produced in the United States?

Which statement is inconsistent with the chemistry of the noble gases?

Which is not a chemical reaction of the alkali metal sodium?

What statement about nitric acid is not true?

In which set are all compounds considered to be covalent binary hydrides?

Which one of the following has a two-dimensional layer structure?

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

What are the signs are expected for the entropy change ΔS and free energy change ΔG for the reaction below? N2H4(l)+ N2O4(l)→ 3 N2(g)+ 4 H2O(g)ΔH = -1049 kJ

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

-Which element shown on the periodic table above forms an interstitial binary hydride with the formula MX_x?

What are the signs are expected for the entropy change ΔS and free energy change ΔG for the reaction below? N₂H₄(l)+ N₂O₄(l)→ 3 N₂(g)+ 4 H₂O(g)ΔH = -1049 kJ