Question 1

Determine all of the ionic hydrides from the compounds listed below. I.CaH2 II.H2S III.SiH4

Accepted Answer

A) I only 
B) II only 
C) I and II 
D) I and III 
E) II and III 
A) I only 
B) II only 
C) I and II 
D) I and III 
E) II and III A

Question 2

Which of these aqueous solutions has the lowest pH?

Accepted Answer

A) 0.100 M NaOH 
B) 0.100 M Na2O 
C) 0.100 M Na3N 
D) all of these solutions have the same pH due to the leveling effect 
E) these all are solutions of weak bases, so Kb values are needed in order to decide 
A) 0.100 M NaOH 
B) 0.100 M Na2O 
C) 0.100 M Na3N 
D) all of these solutions have the same pH due to the leveling effect 
E) these all are solutions of weak bases, so Kb values are needed in order to decide A

Question 3

Write an equation for a laboratory preparation of nitrogen gas.

Accepted Answer

NH₄NO₂(s)$\rarr$ 2H₂O(g)+ N₂(g)

Question 4

Alkali metal hydrides are very reactive with water, forming H2 gas.

Accepted Answer

A) True 
 B)False

Question 5

Write the chemical formula of the peroxide ion.

Accepted Answer

The answer of Write the chemical formula of the peroxide...

Question 6

List the following acids in order of increasing acid strength: HOCl, HClO3, HClO4

Accepted Answer

A) HOCl 3 4 
B) HClO4 3 3 4 4 3 
E) HClO3 4 
A) HOCl 3 4 
B) HClO4 3 3 4 4 3 
E) HClO3 4

Question 7

Which one of these elements is a liquid at room temperature?

Accepted Answer

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

Question 8

The presence of ozone in the upper atmosphere is important because

Accepted Answer

A) O3 absorbs outgoing radiation from the earth's surface, thus helping to keep the earth warm. 
B) O3 absorbs harmful solar radiation. 
C) O3 dissolves in water droplets and is very reactive. 
D) O3 is a major reactant in photosynthesis. 
A) O3 absorbs outgoing radiation from the earth's surface, thus helping to keep the earth warm. 
B) O3 absorbs harmful solar radiation. 
C) O3 dissolves in water droplets and is very reactive. 
D) O3 is a major reactant in photosynthesis.

Question 9

Based on the following options, select the compound with hydrogen in the - 1 oxidation state.

Accepted Answer

A) NaH 
B) B2H6 
C) H2SO4 
D) H2S 
E) PH3 
A) NaH 
B) B2H6 
C) H2SO4 
D) H2S 
E) PH3

Question 10

Which of these substances is being considered as a replacement fuel for gasoline?

Accepted Answer

A) D2O 
B) H2 
C) NO2 
D) F2 
E) He 
A) D2O 
B) H2 
C) NO2 
D) F2 
E) He

Question 11

Which of the following choices is/are covalent oxides? I.SrO II.SiO2 III.SO2

Accepted Answer

A) I only 
B) II only 
C) III only 
D) I and II 
E) II and III 
A) I only 
B) II only 
C) III only 
D) I and II 
E) II and III

Question 12

Hydrogen plays an important role in many industrial processes.Write a balanced chemical equation for its production by the reaction of propane (C3H8, obtained from natural gas)and steam.

Accepted Answer

C₃H₈(g)+ 3H₂O

Question 13

Which of the following choices is/are ionic oxides? I.SrO II.SiO2 III.SO2

Accepted Answer

A) I only 
B) II only 
C) III only 
D) I and II 
E) II and III 
A) I only 
B) II only 
C) III only 
D) I and II 
E) II and III

Question 14

Phosphoric acid is the most important of the phosphorus oxoacids.Industrially, phosphoric acid is prepared by

Accepted Answer

A) the Ostwald process. 
B) the Haber process. 
C) the reaction of phosphate rock with sulfuric acid. 
D) the reaction of P4O10 with water. 
E) the Frasch process. 
A) the Ostwald process. 
B) the Haber process. 
C) the reaction of phosphate rock with sulfuric acid. 
D) the reaction of P4O10 with water. 
E) the Frasch process.

Question 15

Which of the following substances is a superoxide?

Accepted Answer

A) KO2 
B) Na2O2 
C) CO2 
D) CaO 
E) Al2O3 
A) KO2 
B) Na2O2 
C) CO2 
D) CaO 
E) Al2O3

Question 16

When liquid phosphorus trichloride reacts with water, the products are

Accepted Answer

A) PCl5 and H3PO4. 
B) H3PO3 and Cl2. 
C) H3PO4 and HCl. 
D) H3PO4 and Cl2. 
E) H3PO3 and HCl. 
A) PCl5 and H3PO4. 
B) H3PO3 and Cl2. 
C) H3PO4 and HCl. 
D) H3PO4 and Cl2. 
E) H3PO3 and HCl.

Question 17

Select acidic oxide from the choices given.

Accepted Answer

A) CaO 
B) Na2O 
C) Na2O2 
D) P4O6 
E) KOH 
A) CaO 
B) Na2O 
C) Na2O2 
D) P4O6 
E) KOH

Question 18

What element is the most abundant by mass in Earth's crust?

Accepted Answer

A) Fe 
B) H 
C) K 
D) P 
E) O 
A) Fe 
B) H 
C) K 
D) P 
E) O

Question 19

Which of the following will oxidize gold?

Accepted Answer

A) concentrated nitric acid 
B) concentrated hydrochloric acid 
C) aqua regia, a mixture of concentrated nitric acid and concentrated hydrochloric acid 
D) all of the above can oxidize gold 
E) none of the above can oxidize gold because it is a noble metal and too low on the activity series 
A) concentrated nitric acid 
B) concentrated hydrochloric acid 
C) aqua regia, a mixture of concentrated nitric acid and concentrated hydrochloric acid 
D) all of the above can oxidize gold 
E) none of the above can oxidize gold because it is a noble metal and too low on the activity series

Question 20

The bond energy of F2 is unusually low, in comparison with the other halogens, due to the small size of the fluorine atom.Which of the following periodic properties is also unusually low in the case of fluorine?

Accepted Answer

A) first ionization energy 
B) electron affinity 
C) electronegativity 
D) diatomic bond length 
E) ionic radius 
A) first ionization energy 
B) electron affinity 
C) electronegativity 
D) diatomic bond length 
E) ionic radius

Exam 22: Nonmetallic Elements and Their Compounds

Determine all of the ionic hydrides from the compounds listed below. I.CaH2 II.H2S III.SiH4

Which of these aqueous solutions has the lowest pH?

Write an equation for a laboratory preparation of nitrogen gas.

Alkali metal hydrides are very reactive with water, forming H2 gas.

Write the chemical formula of the peroxide ion.

List the following acids in order of increasing acid strength: HOCl, HClO3, HClO4

Which one of these elements is a liquid at room temperature?

The presence of ozone in the upper atmosphere is important because

Based on the following options, select the compound with hydrogen in the - 1 oxidation state.

Which of these substances is being considered as a replacement fuel for gasoline?

Which of the following choices is/are covalent oxides? I.SrO II.SiO2 III.SO2

Hydrogen plays an important role in many industrial processes.Write a balanced chemical equation for its production by the reaction of propane (C3H8, obtained from natural gas)and steam.

Which of the following choices is/are ionic oxides? I.SrO II.SiO2 III.SO2

Phosphoric acid is the most important of the phosphorus oxoacids.Industrially, phosphoric acid is prepared by

Which of the following substances is a superoxide?

When liquid phosphorus trichloride reacts with water, the products are

Select acidic oxide from the choices given.

What element is the most abundant by mass in Earth's crust?

Which of the following will oxidize gold?

The bond energy of F2 is unusually low, in comparison with the other halogens, due to the small size of the fluorine atom.Which of the following periodic properties is also unusually low in the case of fluorine?

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Transition Metal Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

Determine all of the ionic hydrides from the compounds listed below. I.CaH₂II.H₂S III.SiH₄

Alkali metal hydrides are very reactive with water, forming H₂ gas.

List the following acids in order of increasing acid strength: HOCl, HClO₃, HClO₄

Which of the following choices is/are covalent oxides? I.SrO II.SiO₂III.SO₂

Hydrogen plays an important role in many industrial processes.Write a balanced chemical equation for its production by the reaction of propane (C₃H₈, obtained from natural gas)and steam.

Which of the following choices is/are ionic oxides? I.SrO II.SiO₂III.SO₂

The bond energy of F₂ is unusually low, in comparison with the other halogens, due to the small size of the fluorine atom.Which of the following periodic properties is also unusually low in the case of fluorine?