Question 1

Carbon dioxide is the formal anhydride of

Accepted Answer

A) H2CO3 
B) HCOOH 
C) H2CO 
D) CO32F1F1F1S1F1F1F10 
A) H2CO3 
B) HCOOH 
C) H2CO 
D) CO32F1F1F1S1F1F1F10

Question 2

Which of the following is not a redox reaction?

Accepted Answer

A) 3Mg + N2 F1F1F1S1F1F1F10 Mg3N2 
B) 2P3F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10 2PH3 + 6OHF1F1F1S1F1F1F10 
C) 2NaN3 F1F1F1S1F1F1F10 2Na + N2 
D) 2NO + O2 F1F1F1S1F1F1F10 2NO2 
E) N2H4 + O2 F1F1F1S1F1F1F10 N2 + 2H2O 
A) 3Mg + N2 F1F1F1S1F1F1F10 Mg3N2 
B) 2P3F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10F1F1F1S1F1F1F10 2PH3 + 6OHF1F1F1S1F1F1F10 
C) 2NaN3 F1F1F1S1F1F1F10 2Na + N2 
D) 2NO + O2 F1F1F1S1F1F1F10 2NO2 
E) N2H4 + O2 F1F1F1S1F1F1F10 N2 + 2H2O

Question 3

Lithium and sodium burn in air to produce

Accepted Answer

A) Li2O(s)and Na2O(s). 
B) LiO2(s)and Na2O(s). 
C) Li2O(s)and Na2O2(s). 
D) LiO2(s)and Na2O2(s). 
E) Li2O2(s)and NaO2(s). 
A) Li2O(s)and Na2O(s). 
B) LiO2(s)and Na2O(s). 
C) Li2O(s)and Na2O2(s). 
D) LiO2(s)and Na2O2(s). 
E) Li2O2(s)and NaO2(s).

Question 4

All of the following elements form hydrides except

Accepted Answer

A) K 
B) Be 
C) Ca 
D) Rb 
A) K 
B) Be 
C) Ca 
D) Rb

Question 5

Autoprotolysis occurs to a much smaller extent in ammonia (Km = 1 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F1033 at F1F1F1S1F1F1F1035F1F1F1S1F1F1F10C)than in water.This means that

Accepted Answer

A) very strong bases that would be protonated in water survive in their anionic form in ammonia. 
B) [NH4+(am)] F1F1F1S1F1F1F10 [NH2F1F1F1S1F1F1F10(am)]. 
C) strongly ionic compounds are very soluble in ammonia. 
D) ammonia is not very soluble in water. 
E) ammonia is not a very good solvent for a wide range of compounds. 
A) very strong bases that would be protonated in water survive in their anionic form in ammonia. 
B) [NH4+(am)] F1F1F1S1F1F1F10 [NH2F1F1F1S1F1F1F10(am)]. 
C) strongly ionic compounds are very soluble in ammonia. 
D) ammonia is not very soluble in water. 
E) ammonia is not a very good solvent for a wide range of compounds.

Question 6

Nitrogen triiodide can be prepared as the ammoniate,NI3·NH3.This compound is explosive when dry and decomposes according to the reaction below. 2NI3·NH3 F1F1F1S1F1F1F10 N2 + 2NH3 + 3I2
In this reaction,nitrogen undergoes a change in oxidation number from

Accepted Answer

A) +3 to 0. 
B) +3 to F1F1F1S1F1F1F103. 
C) There is no change in oxidation number occurs because this is not a redox reaction. 
D) +6 to 0. 
E) +1 to 0. 
A) +3 to 0. 
B) +3 to F1F1F1S1F1F1F103. 
C) There is no change in oxidation number occurs because this is not a redox reaction. 
D) +6 to 0. 
E) +1 to 0.

Question 7

The formula of hydrazine is

Accepted Answer

A) N2H2. 
B) HNO2. 
C) NH2NH2. 
D) HN3.  
E) NH2OH. 
A) N2H2. 
B) HNO2. 
C) NH2NH2. 
D) HN3.  
E) NH2OH.

Question 8

Sodium borohydride is produced from the reaction of

Accepted Answer

A) B(OH)3(aq)and BCl3(l). 
B) NaH(s)and B(s). 
C) NaH(s)and B2O3(s). 
D) NaH(s)and B(OH)3(aq). 
E) NaH(s)and BCl3(l). 
A) B(OH)3(aq)and BCl3(l). 
B) NaH(s)and B(s). 
C) NaH(s)and B2O3(s). 
D) NaH(s)and B(OH)3(aq). 
E) NaH(s)and BCl3(l).

Question 9

All the following statements about are characteristic of fluorine or its compounds are true except

Accepted Answer

A) Fluorine has a high electronegativity. 
B) Fluorine brings about low oxidation numbers in other elements. 
C) Fluorine has a very small size. 
D) Fluorine does not have available d-orbitals for bonding. 
E) Fluorine has an oxidation number of F1F1F1S1F1F1F101. 
A) Fluorine has a high electronegativity. 
B) Fluorine brings about low oxidation numbers in other elements. 
C) Fluorine has a very small size. 
D) Fluorine does not have available d-orbitals for bonding. 
E) Fluorine has an oxidation number of F1F1F1S1F1F1F101.

Question 10

Consider the unbalanced reactions
Na(s)+ P4(s)F1F1F1S1F1F1F10 A
A + H2O(l)F1F1F1S1F1F1F10 B + C
Write the formulas of A,B,and C.

Accepted Answer

A = Na₃P(s)

Question 11

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)F1F1F1S1F1F1F10 Cu2+(aq)+ H2(g). 
B) 2H2O(l)F1F1F1S1F1F1F10 2H2(g)+ O2(g). 
C) CH3OH(l)F1F1F1S1F1F1F10 2H2(g)+ CO(g). 
D) CH4(g)+ H2O(g)F1F1F1S1F1F1F10 CO(g)+ 3H2(g). 
E) Zn(s)+ 2HCl(aq)F1F1F1S1F1F1F10 ZnCl2(aq)+ H2(g). 
A) Cu(s)+ 2H+(aq)F1F1F1S1F1F1F10 Cu2+(aq)+ H2(g). 
B) 2H2O(l)F1F1F1S1F1F1F10 2H2(g)+ O2(g). 
C) CH3OH(l)F1F1F1S1F1F1F10 2H2(g)+ CO(g). 
D) CH4(g)+ H2O(g)F1F1F1S1F1F1F10 CO(g)+ 3H2(g). 
E) Zn(s)+ 2HCl(aq)F1F1F1S1F1F1F10 ZnCl2(aq)+ H2(g).

Question 12

Which of the following pairs of elements have similar polarizability?

Accepted Answer

A) Be and Al 
B) Li and Na 
C) B and Al 
D) Be and Mg 
E) Mg and B 
A) Be and Al 
B) Li and Na 
C) B and Al 
D) Be and Mg 
E) Mg and B

Question 13

The sublimation of "dry ice" is spontaneous at 25F1F1F1S1F1F1F10C and 1 atm.What are the signs of F1F1F1S1F1F1F10HF1F1F1S1F1F1F10 and F1F1F1S1F1F1F10SF1F1F1S1F1F1F10,respectively?

Accepted Answer

A) 0, + 
B) +, F1F1F1S1F1F1F10 
C) (F1F1F1S1F1F1F10, +) 
D) +, + 
E) (F1F1F1S1F1F1F10, F1F1F1S1F1F1F10) 
A) 0, + 
B) +, F1F1F1S1F1F1F10 
C) (F1F1F1S1F1F1F10, +) 
D) +, + 
E) (F1F1F1S1F1F1F10, F1F1F1S1F1F1F10)

Question 14

How do the saline hydrides react in water?

Accepted Answer

A) They reduce water and produce O2(g). 
B) They all produce H3O+(aq). 
C) They oxidize water and produce O2(g). 
D) Saline hydrides are actually insoluble in water. 
E) They reduce water and produce H2(g). 
A) They reduce water and produce O2(g). 
B) They all produce H3O+(aq). 
C) They oxidize water and produce O2(g). 
D) Saline hydrides are actually insoluble in water. 
E) They reduce water and produce H2(g).

Question 15

Which of the following pairs are allotropes?

Accepted Answer

A) S8(s)and H2S(g) 
B) S(s)and SO2(g) 
C) O2(g)and H2O2(l) 
D) C(s)and CO2(g) 
E) O2(g)and O3(g) 
A) S8(s)and H2S(g) 
B) S(s)and SO2(g) 
C) O2(g)and H2O2(l) 
D) C(s)and CO2(g) 
E) O2(g)and O3(g)

Question 16

The compound BeI2 is an ionic compound.True or false?

Accepted Answer

A) True 
 B)False

Question 17

Lead is obtained from the oxide PbO by

Accepted Answer

A) reduction with aluminum. 
B) treatment with concentrated sulfuric acid. 
C) reduction with carbon. 
D) reduction with CO(g). 
E) heating to 1600F1F1F1S1F1F1F10C. 
A) reduction with aluminum. 
B) treatment with concentrated sulfuric acid. 
C) reduction with carbon. 
D) reduction with CO(g). 
E) heating to 1600F1F1F1S1F1F1F10C.

Question 18

The oxides of In and Tl

Accepted Answer

A) are amphoteric. 
B) react with base. 
C) react with water. 
D) are unstable and cannot be isolated. 
E) are basic. 
A) are amphoteric. 
B) react with base. 
C) react with water. 
D) are unstable and cannot be isolated. 
E) are basic.

Question 19

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 20

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

Accepted Answer

Both form a Lewis ac

Carbon dioxide is the formal anhydride of

Which of the following is not a redox reaction?

Lithium and sodium burn in air to produce

All of the following elements form hydrides except

Autoprotolysis occurs to a much smaller extent in ammonia (K_m = 1  10^³³ at 35C)than in water.This means that

Nitrogen triiodide can be prepared as the ammoniate,NI₃·NH₃.This compound is explosive when dry and decomposes according to the reaction below. 2NI₃·NH₃  N₂ + 2NH₃ + 3I₂ In this reaction,nitrogen undergoes a change in oxidation number from

The formula of hydrazine is

Sodium borohydride is produced from the reaction of

All the following statements about are characteristic of fluorine or its compounds are true except

Consider the unbalanced reactions Na(s)+ P₄(s) A A + H₂O(l) B + C Write the formulas of A,B,and C.

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 pairs of elements have similar polarizability?

The sublimation of "dry ice" is spontaneous at 25C and 1 atm.What are the signs of H and S,respectively?

How do the saline hydrides react in water?

Which of the following pairs are allotropes?

The compound BeI₂ is an ionic compound.True or false?

Lead is obtained from the oxide PbO by

The oxides of In and Tl

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

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

The Quantum World

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Molecular Shape and Structure

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Thermodynamics: the Second and Third Laws

Physical Equilibria

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Exam 16: The Elements: the Main Group Elements

Carbon dioxide is the formal anhydride of

Which of the following is not a redox reaction?

Lithium and sodium burn in air to produce

All of the following elements form hydrides except

Autoprotolysis occurs to a much smaller extent in ammonia (Km = 1  1033 at 35C)than in water.This means that

Nitrogen triiodide can be prepared as the ammoniate,NI3·NH3.This compound is explosive when dry and decomposes according to the reaction below. 2NI3·NH3  N2 + 2NH3 + 3I2 In this reaction,nitrogen undergoes a change in oxidation number from

The formula of hydrazine is

Sodium borohydride is produced from the reaction of

All the following statements about are characteristic of fluorine or its compounds are true except

Consider the unbalanced reactions Na(s)+ P4(s) A A + H2O(l) B + C Write the formulas of A,B,and C.

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 pairs of elements have similar polarizability?

The sublimation of "dry ice" is spontaneous at 25C and 1 atm.What are the signs of H and S,respectively?

How do the saline hydrides react in water?

Which of the following pairs are allotropes?

The compound BeI2 is an ionic compound.True or false?

Lead is obtained from the oxide PbO by

The oxides of In and Tl

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

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

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: the First Law

Thermodynamics: the Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

Autoprotolysis occurs to a much smaller extent in ammonia (K_m = 1  10^³³ at 35C)than in water.This means that

Nitrogen triiodide can be prepared as the ammoniate,NI₃·NH₃.This compound is explosive when dry and decomposes according to the reaction below. 2NI₃·NH₃  N₂ + 2NH₃ + 3I₂ In this reaction,nitrogen undergoes a change in oxidation number from

Consider the unbalanced reactions Na(s)+ P₄(s) A A + H₂O(l) B + C Write the formulas of A,B,and C.

The compound BeI₂ is an ionic compound.True or false?