Question 1

Tetrasulfur dinitride decomposes explosively when heated.What is its formula?

Accepted Answer

A)  S2N4
B)  S4N2
C)  4SN2
D)  S4N
E)  S2NF) A) and B)
G) A) and D)

Question 2

The mass of a neutron is equal to the mass of a proton plus the mass of an electron.

Accepted Answer

A) True 
 B)False

Question 3

When an alkali metal combines with a non-metal,a covalent bond is normally formed.

Accepted Answer

A) True 
 B)False

Question 4

Compound 1 has a composition of 46.7 mass % of element A and 53.3 mass % of element B.A and B also form a second binary compound (compound 2) .If the compositions of the two compounds are consistent with the law of multiple proportions,which of the following compositions could be that of compound 2?

Accepted Answer

A)  23.4 mass % A 76.6 mass % B
B)  30.4 mass % A 69.6 mass % B
C)  33.3 mass % A 66.7 mass % B
D)  53.3 mass % A 46.7 mass % B
E)  73.3 mass % A 26.7 mass % BF) B) and D)
G) B) and E)

Question 5

Atoms X,Y,Z,and R have the following nuclear compositions: 
Which two are isotopes?

Accepted Answer

A)  X & Y
B)  X & R
C)  Y & R
D)  Z & R
E)  X & ZF) C) and D)
G) D) and E)

Question 6

Sodium peroxide is an oxidizer used to bleach animal and vegetable fibers.What is its formula?

Accepted Answer

A)  NaO
B)  NaO2
C)  Na2O2
D)  Na2O
E)  NaH2O2 F) C) and D)
G) B) and D)

Question 7

a.Give the names of the following ions:
(i)NH4+
  (ii)SO32-
 b.Write down the formulas of the following ions:
(i)aluminum
(ii)carbonate

Accepted Answer

a.(i)ammon...

Question 8

Potassium permanganate is a strong oxidizer that reacts explosively with easily oxidized materials.What is its formula?

Accepted Answer

A)  KMnO3
B)  KMnO4
C)  K2MnO4
D)  K(MnO4) 2
E)  K2Mn2O7 F) A) and B)
G) C) and D)

Question 9

In nature,some elements exist as molecules,while others do not.

Accepted Answer

A) True 
 B)False

Question 10

Millikan's oil-drop experiment

Accepted Answer

A)  established the charge on an electron.
B)  showed that all oil drops carried the same charge.
C)  provided support for the nuclear model of the atom.
D)  suggested that some oil drops carried fractional numbers of electrons.
E)  suggested the presence of a neutral particle in the atom.F) A) and E)
G) All of the above

Question 11

What is the formula for lithium nitrite?

Accepted Answer

A)  LiNO2
B)  Li2NO2
C)  LiNO3
D)  Li2NO3
E)  LiNO4 F) C) and D)
G) A) and B)

Question 12

Dalton's atomic theory has required some modifications in the light of subsequent discoveries.For any two appropriate postulates of Dalton's atomic theory
a.state the postulate in its original form
b.In one sentence,describe why the postulate has needed modification.

Accepted Answer

Matter consists of atoms which are indiv...

Question 13

The colorless substance,MgF2,is used in the ceramics and glass industry.What is its name?

Accepted Answer

A)  magnesium difluoride
B)  magnesium fluoride
C)  magnesium(II) fluoride
D)  monomagnesium difluoride
E)  none of these choices is correct,since they are all misspelledF) All of the above
G) B) and D)

Question 14

Silver chloride is used in photographic emulsions.What is its formula?

Accepted Answer

A)  Ag2Cl3
B)  Ag2Cl
C)  AgCl3
D)  AgCl2
E)  AgClF) A) and B)
G) All of the above

Question 15

Barium fluoride is used in embalming and in glass manufacturing.Which of the following gives the formula and bonding for barium fluoride?

Accepted Answer

A)  BaF2,ionic compound
B)  BaF2,covalent compound
C)  BaF,ionic compound
D)  BaF,covalent compound
E)  Ba2F,ionic compoundF) C) and E)
G) C) and D)

Question 16

What is the name of the acid formed when H2S gas is dissolved in water?

Accepted Answer

A)  sulfuric acid
B)  sulfurous acid
C)  hydrosulfuric acid
D)  hydrosulfurous acid
E)  sulfidic acidF) None of the above
G) A) and D)

Question 17

Which of the following ions occurs commonly?

Accepted Answer

A)  P3+
B)  Br7+
C)  O6+
D)  Ca2+
E)  K-F) All of the above
G) A) and D)

Question 18

The compound,NaH2PO4,is present in many baking powders.What is its name?

Accepted Answer

A)  sodium biphosphate
B)  sodium hydrogen phosphate
C)  sodium dihydrogen phosphate
D)  sodium hydrophosphate
E)  sodium dihydride phosphateF) A) and B)
G) B) and D)

Question 19

All neutral atoms of tin have 50 protons and 50 electrons.

Accepted Answer

A) True 
 B)False

Question 20

Which one of the following formulas of ionic compounds is the least likely to be correct?

Accepted Answer

A)  NH4Cl
B)  Ba(OH) 2
C)  Na2SO4
D)  Ca2NO3
E)  Cu(CN) 2 F) A) and C)
G) All of the above

Exam 2: The Components of Matter

What is the formula for lithium nitrite?

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Silver chloride is used in photographic emulsions.What is its formula?

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Dalton's atomic theory has required some modifications in the light of subsequent discoveries.For any two appropriate postulates of Dalton's atomic theory a.state the postulate in its original form b.In one sentence,describe why the postulate has needed modification.

Correct AnswerverifiedMatter consists of atoms which are indiv...View AnswerShow Answer

Atoms X,Y,Z,and R have the following nuclear compositions: Which two are isotopes?

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Which of the following ions occurs commonly?

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Potassium permanganate is a strong oxidizer that reacts explosively with easily oxidized materials.What is its formula?

Correct AnswerverifiedShow Answer

The compound,NaH2PO4,is present in many baking powders.What is its name?

Correct AnswerverifiedShow Answer

Which one of the following formulas of ionic compounds is the least likely to be correct?

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Barium fluoride is used in embalming and in glass manufacturing.Which of the following gives the formula and bonding for barium fluoride?

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In nature,some elements exist as molecules,while others do not.

Correct AnswerverifiedShow Answer

The mass of a neutron is equal to the mass of a proton plus the mass of an electron.

Correct AnswerverifiedShow Answer

The colorless substance,MgF2,is used in the ceramics and glass industry.What is its name?

Correct AnswerverifiedShow Answer

When an alkali metal combines with a non-metal,a covalent bond is normally formed.

Correct AnswerverifiedShow Answer

Sodium peroxide is an oxidizer used to bleach animal and vegetable fibers.What is its formula?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

a.Give the names of the following ions: (i)NH4+ (ii)SO32- b.Write down the formulas of the following ions: (i)aluminum (ii)carbonate

Correct Answerverifieda.(i)ammon...View AnswerShow Answer

Millikan's oil-drop experiment

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All neutral atoms of tin have 50 protons and 50 electrons.

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Tetrasulfur dinitride decomposes explosively when heated.What is its formula?

Correct AnswerverifiedShow Answer

What is the name of the acid formed when H2S gas is dissolved in water?

Correct AnswerverifiedShow Answer

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Matter consists of atoms which are indiv...
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The compound,NaH₂PO₄,is present in many baking powders.What is its name?

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The colorless substance,MgF₂,is used in the ceramics and glass industry.What is its name?

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a.Give the names of the following ions: (i)NH₄⁺ (ii)SO₃^2- b.Write down the formulas of the following ions: (i)aluminum (ii)carbonate

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a.(i)ammon...
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What is the name of the acid formed when H₂S gas is dissolved in water?

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