Question 1

In a certain science fiction movie, one of the main characters describes an alien planet that has an atmosphere composed of carbon monoxide and fluorine gases. Could such an atmosphere really exist?

Accepted Answer

A)   Yes.
B)   No, because fluorine would oxidize carbon monoxide to carbon dioxide.
C)   No, because fluorine would reduce carbon monoxide to methane.
D)   No, because carbon monoxide would oxidize fluorine to oxygen difluoride.
E)   No, because carbon monoxide would reduce fluorine to hydrogen fluoride.F) B) and E)
G) A) and B)

Question 2

Which oxide is an amphoteric oxide?

Accepted Answer

A)   Na2O
B)   Al2O3
C)   BaO
D)   SiO2
E)   More that one of these oxides is amphoteric.F) A) and E)
G) C) and D)

Question 3

Name the three different classes (types) of hydride, and list some of their important characteristics.

Accepted Answer

Ionic hydrides form with metals from Gro...

Question 4

Which of these elements occupies a position on the periodic table that is not entirely consistent with its chemical properties?

Accepted Answer

A)   H
B)   He
C)   Ar
D)   Al
E)   UF) A) and B)
G) C) and D)

Question 5

What is formed when molecular hydrogen combines with any alkali metal?

Accepted Answer

The answer of What is formed when molecular hydrogen combines...

Question 6

Identify by number (1A-8A) the main group of the periodic table to which the described element (X) belongs, in each of the following cases.
a. X commonly forms the ion X2-.
b. X reacts with water according to the equation
X(s) + 2H2O(l) → X(OH)2(aq) + H2(g)
c. X exists as molecules, X2; its hydride has the formula HX.
d. X is a metal which reacts with oxygen to produce the peroxide, X2O2.

Accepted Answer

a. 6A (16)...

Question 7

What is the general electron configuration for atoms of all elements in Group 5A?

Accepted Answer

A)   ns2np1
B)   ns2np6
C)   ns2np5
D)   ns2np3
E)   ns2np4F) B) and C)
G) D) and E)

Question 8

The chemical that ranks first in production among all industrial chemicals is

Accepted Answer

A)   NH3, ammonia.
B)   H3PO4, phosphoric acid.
C)   NaOH, sodium hydroxide.
D)   Na2CO3, sodium carbonate.
E)   H2SO4, sulfuric acid.F) B) and C)
G) A) and E)

Question 9

Explain why a human should not drink D2O.

Accepted Answer

Deuterium is heavier than hydrogen and deuterium compounds react slower than lighter isotopes. There is a slower rate of transfer of deuterium as compared to hydrogen in acid-base reactions involved in enzyme catalysis. This slow transfer rate will cause death to humans.

Question 10

Hydrogen is placed at the top of Group 1A of the periodic table, so it must be a metal.

Accepted Answer

A) True 
 B)False

Question 11

What process involves the addition of a hydrogen molecule to compounds containing multiple bonds?

Accepted Answer

A)   Hydration
B)   Alkanation
C)   Hydrogenation
D)   Esterification
E)   CoagulationF) A) and C)
G) None of the above

Question 12

Which of these substances will have a Lewis structure with an incomplete octet?

Accepted Answer

A)   SO2
B)   CO
C)   NO
D)   Br2
E)   CO2F) B) and D)
G) A) and D) C

Question 13

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.E) C) and D)
F) B) and C)

Question 14

Which of the following elements is essential to life because it is a component of proteins and nucleic acids?

Accepted Answer

A)   Phosphorus
B)   Sulfur
C)   Chlorine
D)   Bromine
E)   NitrogenF) D) and E)
G) B) and E)

Question 15

Which of the following elements can be oxidized by nitric acid to form its corresponding oxoacid?

Accepted Answer

A)   Sulfur
B)   Gold
C)   Phosphorus
D)   Both Sulphur and Phosphorus
E)   Both Sulphur and GoldF) A) and E)
G) A) and D)

Question 16

What is the formal charge on the oxygen atom in N2O (the atomic order is N-N-O)  with a triple bond between the two N atoms and a single bond between N and O?

Accepted Answer

A)   -2
B)   +2
C)   0
D)   -1
E)   +1F) C) and E)
G) A) and E)

Question 17

Which of the following is an accurate comparison of the properties of nitrogen and oxygen?

Accepted Answer

A)   Both oxygen and nitrogen form anions easily.
B)   Oxygen is a strong oxidizing agent while nitrogen is a strong reducing agent.
C)   Nitrogen uses more oxidation states in its compounds than oxygen does.
D)   Nitrogen is more reactive than oxygen.
E)   Nitrogen does not form naturally occurring compounds, but oxygen does.F) A) and D)
G) None of the above

Question 18

How many lone electron pairs are in the N2 molecule?

Accepted Answer

A)   1
B)   4
C)   3
D)   5
E)   2F) A) and D)
G) A) and E)

Question 19

The strongest elemental oxidizing agents are found in the ________ ________ region of the periodic table while the strongest reducing agents are found in the ________ ________ region of the periodic table.

Accepted Answer

A)   upper left, lower right
B)   upper right, lower left
C)   lower left, upper right
D)   lower right, upper left
E)   transition element, main groupF) D) and E)
G) A) and C) B

Question 20

What are the products of the reaction of strontium hydride and water?SrH2(s)  + H2O(l)  →

Accepted Answer

A)   Sr2+(aq)  + H2(g)  + O2(g) 
B)   Sr2+(aq)  + H2(g)  + OH-(aq) 
C)   Sr(s)  + H2(g)  + OH-(aq) 
D)   Sr(s)  + H3O+(aq) 
E)   Sr2+(aq)  + H-(aq) F) A) and D)
G) B) and D)

Exam 25: Organic Chemistry

In a certain science fiction movie, one of the main characters describes an alien planet that has an atmosphere composed of carbon monoxide and fluorine gases. Could such an atmosphere really exist?

Correct Answer
verified

Which oxide is an amphoteric oxide?

Correct Answer
verified

Name the three different classes (types) of hydride, and list some of their important characteristics.

Correct Answer
verified
Ionic hydrides form with metals from Gro...
View Answer

Which of these elements occupies a position on the periodic table that is not entirely consistent with its chemical properties?

Correct Answer
verified

What is formed when molecular hydrogen combines with any alkali metal?

Correct Answer
verified

Correct Answer
verified
a. 6A (16)...
View Answer

What is the general electron configuration for atoms of all elements in Group 5A?

Correct Answer
verified

The chemical that ranks first in production among all industrial chemicals is

Correct Answer
verified

Explain why a human should not drink D₂O.

Correct Answer
verified
Deuterium is heavier than hydrogen and deuterium compounds react slower than lighter isotopes. There is a slower rate of transfer of deuterium as compared to hydrogen in acid-base reactions involved in enzyme catalysis. This slow transfer rate will cause death to humans.

Hydrogen is placed at the top of Group 1A of the periodic table, so it must be a metal.

Correct Answer
verified

What process involves the addition of a hydrogen molecule to compounds containing multiple bonds?

Correct Answer
verified

Which of these substances will have a Lewis structure with an incomplete octet?

Correct Answer
verified
C

The presence of ozone in the upper atmosphere is important because

Correct Answer
verified

Which of the following elements is essential to life because it is a component of proteins and nucleic acids?

Correct Answer
verified

Which of the following elements can be oxidized by nitric acid to form its corresponding oxoacid?

Correct Answer
verified

What is the formal charge on the oxygen atom in N₂O (the atomic order is N-N-O) with a triple bond between the two N atoms and a single bond between N and O?

Correct Answer
verified

Which of the following is an accurate comparison of the properties of nitrogen and oxygen?

Correct Answer
verified

How many lone electron pairs are in the N₂ molecule?

Correct Answer
verified

The strongest elemental oxidizing agents are found in the region of the periodic table while the strongest reducing agents are found in the region of the periodic table.

Correct Answer
verified
B

What are the products of the reaction of strontium hydride and water?SrH₂(s) + H₂O(l) →

Correct Answer
verified

Exam 25: Organic Chemistry

In a certain science fiction movie, one of the main characters describes an alien planet that has an atmosphere composed of carbon monoxide and fluorine gases. Could such an atmosphere really exist?

Correct AnswerverifiedShow Answer

Which oxide is an amphoteric oxide?

Correct AnswerverifiedShow Answer

Name the three different classes (types) of hydride, and list some of their important characteristics.

Correct AnswerverifiedIonic hydrides form with metals from Gro...View AnswerShow Answer

Which of these elements occupies a position on the periodic table that is not entirely consistent with its chemical properties?

Correct AnswerverifiedShow Answer

What is formed when molecular hydrogen combines with any alkali metal?

Correct AnswerverifiedShow Answer

Correct Answerverifieda. 6A (16)...View AnswerShow Answer

What is the general electron configuration for atoms of all elements in Group 5A?

Correct AnswerverifiedShow Answer

The chemical that ranks first in production among all industrial chemicals is

Correct AnswerverifiedShow Answer

Explain why a human should not drink D2O.

Correct AnswerverifiedDeuterium is heavier than hydrogen and deuterium compounds react slower than lighter isotopes. There is a slower rate of transfer of deuterium as compared to hydrogen in acid-base reactions involved in enzyme catalysis. This slow transfer rate will cause death to humans.

Hydrogen is placed at the top of Group 1A of the periodic table, so it must be a metal.

Correct AnswerverifiedShow Answer

What process involves the addition of a hydrogen molecule to compounds containing multiple bonds?

Correct AnswerverifiedShow Answer

Which of these substances will have a Lewis structure with an incomplete octet?

Correct AnswerverifiedC

The presence of ozone in the upper atmosphere is important because

Correct AnswerverifiedShow Answer

Which of the following elements is essential to life because it is a component of proteins and nucleic acids?

Correct AnswerverifiedShow Answer

Which of the following elements can be oxidized by nitric acid to form its corresponding oxoacid?

Correct AnswerverifiedShow Answer

What is the formal charge on the oxygen atom in N2O (the atomic order is N-N-O) with a triple bond between the two N atoms and a single bond between N and O?

Correct AnswerverifiedShow Answer

Which of the following is an accurate comparison of the properties of nitrogen and oxygen?

Correct AnswerverifiedShow Answer

How many lone electron pairs are in the N2 molecule?

Correct AnswerverifiedShow Answer

The strongest elemental oxidizing agents are found in the ________ ________ region of the periodic table while the strongest reducing agents are found in the ________ ________ region of the periodic table.

Correct AnswerverifiedB

What are the products of the reaction of strontium hydride and water?SrH2(s) + H2O(l) →

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Ionic hydrides form with metals from Gro...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
a. 6A (16)...
View Answer

Correct Answer
verified

Correct Answer
verified

Explain why a human should not drink D₂O.

Correct Answer
verified
Deuterium is heavier than hydrogen and deuterium compounds react slower than lighter isotopes. There is a slower rate of transfer of deuterium as compared to hydrogen in acid-base reactions involved in enzyme catalysis. This slow transfer rate will cause death to humans.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the formal charge on the oxygen atom in N₂O (the atomic order is N-N-O) with a triple bond between the two N atoms and a single bond between N and O?

Correct Answer
verified

Correct Answer
verified

How many lone electron pairs are in the N₂ molecule?

Correct Answer
verified

The strongest elemental oxidizing agents are found in the region of the periodic table while the strongest reducing agents are found in the region of the periodic table.

Correct Answer
verified
B

What are the products of the reaction of strontium hydride and water?SrH₂(s) + H₂O(l) →

Correct Answer
verified