Question 1

Ozone (O3)  and oxygen gas (O2)  are examples of

Accepted Answer

A)   isotopes.
B)   allotropes.
C)   polymorphs.
D)   alloys.
E)   amphoterism.F) B) and D)
G) A) and B)

Question 2

Arsenic, As, is

Accepted Answer

A)   an essential element in the human body.
B)   toxic because it results in an increase in the production of ATP.
C)   toxic because it binds to the sulfhydryl group in proteins and enzymes.
D)   used in high concentrations in ancient cosmetics.
E)   None of these choices is correct.F) B) and E)
G) B) and D)

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

What products are formed from the reaction of Cl2(g)  with I-(aq) ?

Accepted Answer

A)   ICl
B)   ICl2
C)   ICl3
D)   I2 and Cl-
E)   I and Cl2-F) A) and D)
G) A) and C)

Question 5

Which of these hydrides is the most ionic?

Accepted Answer

A)   LiH
B)   NaH
C)   CH4
D)   NH3
E)   RbHF) C) and D)
G) None of the above

Question 6

Diamond and graphite are allotropes of ________.

Accepted Answer

The answer of Diamond and graphite are allotropes of ________....

Question 7

Which of these is a polar covalent bond?

Accepted Answer

A)   Na-Cl
B)   Br-Br
C)   P-Cl
D)   All of the choices are polar covalent bonds.
E)   None of these choices is a polar covalent bond.F) A) and B)
G) B) and E)

Question 8

The acidity of oxides of main group elements increases across a period from left to right.

Accepted Answer

A) True 
 B)False

Question 9

Which is NOT true concerning sulfur?

Accepted Answer

A)   Sulfur reacts with carbon to form a flammable liquid.
B)   Sulfur reacts with fluorine to form an inert compound.
C)   Sulfur reacts with oxygen to form a strongly acid oxide.
D)   Sulfur reacts with hydrogen to form a pungent, foul-smelling gas.
E)   In its solid elemental form, sulfur exists as an eight-membered ring.F) A) and B)
G) D) and E)

Question 10

Hydrogen fluoride is used

Accepted Answer

A)   in the manufacture of steel.
B)   in the synthesis of cryolite for aluminum production.
C)   as an oxidizing agent.
D)   as a disinfectant.
E)   as a mouthwash.F) None of the above
G) A) and B)

Question 11

Which of these is isoelectronic with the hydride ion?

Accepted Answer

A)   Hydrogen
B)   Nitrogen
C)   Carbon
D)   Lithium
E)   HeliumF) C) and E)
G) A) and B)

Question 12

Which reaction represents the disproportionation of hydrogen peroxide?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) B) and E)
G) C) and D)

Question 13

Carbon combines with metals to form which of the following ionic compounds?

Accepted Answer

A)   Organo metal complex ions
B)   Carbides
C)   Carbonates
D)   Oxides
E)   Carbon cannot bond to metals.F) All of the above
G) A) and B)

Question 14

Binary hydrides contain hydrogen and either a metal or nonmetal.

Accepted Answer

A) True 
 B)False

Question 15

What is one chemical formula of the carbide ion?

Accepted Answer

A)   Si4-
B)   C2-
C)   C22-
D)   CN-
E)   C3-F) A) and B)
G) All of the above

Question 16

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

Accepted Answer

A)   Fe
B)   H
C)   K
D)   P
E)   OF) A) and C)
G) D) and E)

Question 17

The main commercial source of bromine is

Accepted Answer

A)   silver bromide ore.
B)   seawater.
C)   the Frasch process.
D)   phosphate rock.
E)   the Ostwald process.F) A) and D)
G) A) and B)

Question 18

Chlorine gas is prepared commercially by the

Accepted Answer

A)   electrolysis of carbon tetrachloride.
B)   oxidation of chloride ion with F2(g) .
C)   electrolysis of NaCl(aq) .
D)   oxidation of chloride ion with Br2(aq) .
E)   electrolysis of AlCl3(aq) .F) None of the above
G) C) and E)

Question 19

The nitrate anion is

Accepted Answer

A)   a strong acid.
B)   a strong base.
C)   amphoteric.
D)   a strong reducing agent.
E)   a strong oxidizing agent.F) A) and E)
G) All of the above

Question 20

What is the formal charge on the iodine atom in the iodate ion, IO3-?

Accepted Answer

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

Exam 25: Organic Chemistry

Which reaction represents the disproportionation of hydrogen peroxide?

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Arsenic, As, is

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What is one chemical formula of the carbide ion?

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Binary hydrides contain hydrogen and either a metal or nonmetal.

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Which of these is a polar covalent bond?

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Ozone (O3) and oxygen gas (O2) are examples of

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

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

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Which of these hydrides is the most ionic?

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The nitrate anion is

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Chlorine gas is prepared commercially by the

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Hydrogen fluoride is used

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What products are formed from the reaction of Cl2(g) with I-(aq) ?

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The main commercial source of bromine is

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What is the formal charge on the iodine atom in the iodate ion, IO3-?

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Diamond and graphite are allotropes of ________.

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Which of these is isoelectronic with the hydride ion?

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Carbon combines with metals to form which of the following ionic compounds?

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The acidity of oxides of main group elements increases across a period from left to right.

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Which is NOT true concerning sulfur?

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Ozone (O₃) and oxygen gas (O₂) are examples of

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

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What products are formed from the reaction of Cl₂(g) with I^-(aq) ?

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What is the formal charge on the iodine atom in the iodate ion, IO₃^-?

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