Download Unit 4 Test (Formulas) MC Practice 2009

Chemistry Practice Test: Unit 4 (Formulas)
Name______________________
Multiple Choice: Choose the best answer: Place the letter in the space to the left.
______ 1.
______ 2.
______ 3.
______ 4.
______ 5.
______ 6.
What is the charge on an electron?
a. positive
b. negative
c. neutral
d. no charge
Elements that gain electrons tend to form
a. cations
b. muons
c. positrons
Cations are elements with
a. extra (+) charge b. extra (-) charge
d. anions
c. neutral charge
d. no charge
Sulfur (S) becomes Sulfide (S 2- ) by
a. gaining 2 electrons
b. gaining 2 protons
d. losing 2 electrons
e. losing 2 protons
c. gaining 2 neutrons
Aluminum (Al) becomes a aluminum ion (Al 3+ ) by
a. gaining 3 electrons
b. gaining 3 protons
d. losing 3 electrons
e. losing 3 protons
c. gaining 3 neutrons
With few exceptions, ionic compounds are composed of
a. metals and nonmetals
b. metalloids
d. all metals
e. molecular bonds
c. all nonmetals
______ 7.
Which formula represents an ionic compound even though it contains only nonmetals
a. NO2
b. H2O
c. SO3
d. NH4Cl
______ 8.
Molecular compounds are composed of
a. metals and nonmetals
b. metalloids
d. all metals
e. ionic bonds
______ 9.
Classify the following formula, CaO
a. Ionic Compound
b. Molecular Compound
______ 10.
Classify the following formula, SO2
a. Ionic Compound
b. Molecular Compound
______ 11.
Classify the following formula, H2O
a. Ionic Compound
b. Molecular Compound
______ 12.
Classify the following formula, NH4Br
a. Ionic Compound
b. Molecular Compound
______ 13.
Classify the following formula, O2
a. Ionic Compound
b. Molecular Compound
______ 14.
Classify the following formula, CuCl2
a. Ionic Compound
b. Molecular Compound
______ 15.
Classify the following formula, HC2H3O2
a. Ionic Compound
b. Molecular Compound
______ 16.
Classify the following formula, CO2
a. Ionic Compound
b. Molecular Compound
c. all nonmetals
Determine the correct formula for the following combinations of ions.
______ 17.
______ 18.
______ 19.
______ 20.
______ 21.
______ 22.
______ 23.
______ 24.
______ 25.
______ 26.
______ 27.
______ 28.
______ 29.
______ 30.
______ 31.
______ 32.
______ 33.
______ 34.
Ca 2+
+
a. (Ca 2+)(S 2-)
S 2b. CaS
Al 3+
+
a. Al (SO4) +
K+
+
a. K1Cl1
Cl b. KCl
Ca 2+
+
a. CaNO3 2

__________
c. Ca2S2
d. CaS2
e. (Ca)2S
SO4 2
b. AlSO4 +
__________
c. AlSO4
d. Al2(SO4)3
e. Al2SO3

__________
c. K(Cl)
d. K+Cl-
e. (K)(Cl)
NO3 - 1

b. CaNO3+
__________
c. CaN2O6
d. Ca2NO2
e. Ca(NO3)2
Pb 2+
+
a. Pb2(SO4)2
SO4 2
b. Pb2(SO)2
__________
c. Pb2SO4
d. Pb(SO4)2
e. PbSO4
Na +
+
a. Na3PO4
PO4 3b. NaPO3

__________
c. Na(PO4)3
d. Na4(PO)3
e. NaPO4 2+
Ca 2+
a. CaO
O 2b. Ca2O2

__________
c. Ca2+O2-
d. (Ca)(O)
e. CaO +
+
NH4 +1
+
a. NH4S
S 2
b. (NH4)2S
__________
c. NH4S -
d. NH4S2
e. NHS2
Al 3+
a. AlP
P 3b. Al3(P)3

__________
c. AlP3
d. Al3P3
e. Al3P
__________
c. Al(OH)3
d. Al3OH
e. Al(OH) + 2
__________
c. AlSO4
d. Al(SO4)2
e. Al2SO3
__________
c. 2HSO4
d. H2SO4
e. H(SO4)2
+
Al 3+
+
a. AlOH3
OH 
b. 3Al(OH)
Al 3+
+
a. Al2(SO4)3
SO4 2b. AlSO4 +

H+
+
a. H2(SO) 4
SO4 2b. HSO4 -

Sn 4+
+
a. Sn(SO3)2
SO3 2
b. Sn2(SO)2
__________
c. Sn2SO3
d. Sn4(SO3)2
e. SnSO3+2
Mg 2+
+
a. Mg2(PO4)3
PO4 3
b. Mg3(PO4)2
__________
c. Mg3PO2
d. MgPO4 -1
e. 3Mg2PO4
Al 3+
+
a. AlPO
PO4 3
b. Al3(PO4)3
__________
c. Al(PO4)3
d. AlPO4
e. Al3PO4
Fe 3+
a. FeBr
+
Br b. Fe3Br

__________
c. FeBr3
d. FeBr2
e. FeBr 2+
K+
a. KS
+
S 2b. KS -

__________
c. K2S
d. KS2
e. KS -
__________
c. Mg(CN)2
d. Mg2 CN
e. Mg(CN) +
Mg 2+
+
a. Mg CN
CN 
b. Mg CN 2
______ 35.
NH4 +1
+
a. NH4P
P 3
b. NH4P - 2
__________
c. (NH4)3P
d. NH4P3
e. NHP3
Use the common ion reference sheet to look up the charges on the ions for each of the following formulas.
______ 36.
______ 37.
______ 38.
______ 39.
______ 40.
The correct formula for magnesium sulfate is
a. MgSO4
b. MgSO
c. MgHSO4
d. MgS
e. Mg(SO4)
The correct formula for magnesium hydroxide is
a. MgOH
b. Mg2OH
c. MgOH2
d. Mg(OH)2
e. MgOH+
The correct formula for Iron(III) oxide is
a. FeO
b. Fe3O
c. FeO3
d. Fe2O3
e. Fe3O2
Identify the formula for lead (IV) bromide.
a. PbBr
b. PbBr2
c. PbBr3
d. PbBr4
e. Pb4Br
The correct formula for sodium hydroxide (soda or lye) is
a. NaO
b. NaO2
c. NaOH
d. So(OH)2
e. SOH
______ 41.
Prefixes like “mono”, “di”, “tri”, “tetra” are used when all the elements are
a. metals
b. nonmetals
c. metalloids
d. ions
______ 42.
The correct formula for phosphorus pentachloride is
a. PCl
b. P5Cl
c. PCl5
d. P(Cl)5
e. P5Cl5
The correct formula for sulfur hexabromide is
a. SBr
b. S6Br
c. S(Br)6
d. SBr6
e. S6Br6
The correct formula for carbon dioxide is
a. CO
b. C2O
c. CO2
d. C(O)2
e. (C)2O
The correct formula for dihydrogen monoxide is
a. H2O
b. HO2
c. 2HO
d. (H)2O
e. 2HO2
______ 43.
______ 44.
______ 45.
______ 46.
The correct name for N2O is
a. nitrogen oxide
b. dinitrogen monoxide
c. dinitrogen oxide
______ 47.
The correct name for the molecular compound P2S4 is
a. Phosphorus sulfide
b. Ditetrasulfate
c. Biphosphorus tetrasulfide
d. Diphosphorus tetrasulfide
______ 48.
The correct name for (NaNO3) is
a. sodium nitrate
b. sodium nitride
______ 49.
______ 50.
______ 51.
c. sodium nitroxide
d. sodium nitrogen trioxide
The correct name for the ionic compound Fe(NO3)3 is
a. Iron nitrate
b. Iron(II) nitrate
c. Iron(III) nitrate
The correct name for (NH4Cl) is
a. nitrogen hydrogen chloride
c. ammonium chlorate
The correct name for (AlCl3) is
a. aluminum chloride
d. nitrogen dioxide
d. Iron trinitrate
b. ammonium monochloride
d. ammonium chloride
b. aluminum trichloride
c. alumimum chlorine
______ 52.
______ 53.
______ 54.
______ 55.
Which formula represents an acid?
a. Mg(OH)
b. NaCl
c. HNO3
d. NaOH
e. CO
Which choice best describes the formula: Ca(OH)2
a. acid
b. base
c. salt
d. acid or base
e. molecular only
Which choice best describes the formula: PbCl2
a. acid
b. base
c. salt
d. acid or base
e. molecular only
Which choice best describes the formula: H2SO3
a. acid
b. base
c. salt
d. acid or base
e. molecular only
______ 56.
Which choice best describes the formula: H2O (can also be written as HOH)
a. acid
b. base
c. salt
d. acid or base
e. molecular only
______ 57.
Which choice best describes the formula: CO
a. acid
b. base
c. salt
d. acid or base
e. molecular only
Which choice best describes the formula: NH4NO3
a. acid
b. base
c. salt
d. acid or base
e. molecular only
Which choice best describes the formula: HI
a. acid
b. base
c. salt
d. acid or base
e. molecular only
______ 58.
______ 59.
______ 60.
Identify the name of the following acid (HCl)
a. hydrochloric acid
b. chloric acid
c. chloride acid
d. hydrogen chloride acid
______ 61.
Identify the name of the following acid (H2CO3)
a. carbonate acid
b. hydrocarbonic acid c. hydrocarbonate acid d. carbonic acid
______ 62.
Identify the name of the following acid (H2SO3)
a. sulfurous acid
b. sulfuric acid
c. sulfite acid
d. hydrosulfurous acid
Identify the name of the following acid (H2SO4)
a. sulfurous acid
b. sulfuric acid
c. sulfate acid
d. hydrosulfuric acid
Identify the name of the following acid (H2S)
a. sulfurous acid
b. sulfuric acid
c. sulfate acid
d. hydrosulfuric acid
______ 63.
______ 64.
______ 65. In Lab 7, you tested for the presence of two cations and two anions in tap water. What ion made
the testing solution turn blood red?
a. Fe3+
b. Ca2+
c. Cld. SO42______ 66. Use the Table of Solubilities to determine which ion is always soluble?
a. NO3-1
b. CO32c. Pb2+
d. Ca2+
______ 67. Which anion is best suited to remove mercury (II) ions from a sample of water?
Hint: Look for anions that are insoluble with Hg2+
a. NO3-1 (aq)
b. CO32- (aq)
c. Cl- (aq)
d. C2H3O2 -1
(aq)
______ 68. What chemical solution is best suited to remove lead (II) ions from a sample of water?
Hint: Look for solutions that contain anions that are insoluble with Pb2+
a. Ca(NO3)2 (aq)
b. HNO3 (aq)
c. Na2SO4 (aq)
d. KC2H3O2 (aq)