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Total questions: 41
Worksheet time: 1hrs 6mins
Name
Class
Date
1.
Is CaCl2 ionic or molecular (covalent)?
a)
ionic
b)
molecular (covalent)
2.
The substances that are present before a reaction are the...
a)
reactants
b)
products
c)
both of these
d)
neither of these
3.
What coefficients are needed to correctly balance the equation?
_Bi + _O2 > _Bi2O3
_Bi + _O2 > _Bi2O3
a)
3,2,3
b)
2,3,2
c)
4,3,2
d)
none of these
4.
In a chemical equation, the substances that are on the right side of the arrow are the...
a)
reactants
b)
products
c)
catalysts
d)
inhibitors
5.
Why must chemical equations be balanced?
a)
So that the equation doesn't explode
b)
The reaction won't happen until it is balanced
c)
Matter cannot be created or destroyed
d)
None of these
6.
Which type of reaction starts with a single compound? (AB > A + B)
a)
synthesis
b)
decomposition
c)
single displacement
d)
double displacement
7.
Which type of reaction is this?
2Na + Cl2 > 2NaCl
2Na + Cl2 > 2NaCl
a)
synthesis
b)
decomposition
c)
single displacement
d)
double displacement
8.
What must go in the blank space to balance the equation?
4Fe + _O2 > 2Fe2O3
4Fe + _O2 > 2Fe2O3
a)
1
b)
2
c)
3
d)
4
9.
Which of these is a double displacement reaction?
a)
2Mg + O2 > 2MgO
b)
Mg + 2HCl > H2 + MgCl2
c)
MgI2 + K2CO3 > MgCO3 + 2Kl
d)
MgCO3 > MgO + CO2
10.
Which type of chemical reaction is this?
2C2H6 + 5O2 > 4CO2 + 6H2O
2C2H6 + 5O2 > 4CO2 + 6H2O
a)
single displacement
b)
double displacement
c)
combustion
d)
synthesis
11.
Which coefficients are needed to correctly balance the equation?
_Ca + _AlBr3 > _CaBr2 + _Al
_Ca + _AlBr3 > _CaBr2 + _Al
a)
2, 2, 3, 3
b)
3, 2, 3, 2
c)
3, 3, 2, 2
d)
2, 3, 2, 3
12.
Write a chemical equation for the following reaction:
zinc and lead (II) nitrate react to form zinc (II) nitrate and lead
zinc and lead (II) nitrate react to form zinc (II) nitrate and lead
a)
Zn + PbNO --> ZnNO + Pb
b)
Zn + Pb2NO --> Zn2NO + Pb
c)
Zn + PbNO3 --> ZnNO3 + Pb
d)
Zn + Pb(NO3)2 --> Zn(NO3)2 + Pb
13.
Write a chemical equation for the following reaction:
potassium and chlorine combine to form potassium chloride
potassium and chlorine combine to form potassium chloride
a)
K2 + Cl2 → KCl
b)
K + Cl2 → KCl
c)
K + Cl → KCl
d)
K + Cl2 → KCl
14.
Balance this equation, Al2O3 ---> Al + O2
a)
Cannot be balanced
b)
2Al2O3 ---> 2Al + 3O2
c)
2Al2O3 ---> 4Al + 3O2
d)
3Al2O3 ---> 2Al + O2
15.
The correct formula for magnesium oxide is
a)
Mg2O
b)
MgO
c)
MgO2
d)
Mg2O3
16.
The correct name for the compound with the formula CaSO4 is
a)
calcium sulfur oxide
b)
calcium sulfide
c)
calcium sulfate
d)
calcium sulfur tetroxide
17.
In chemical reactions, the law of conservation of mass is......
a)
disobeyed
b)
not true
c)
obeyed
d)
used sometime
18.
Exothermic reactions...
a)
Absorb energy
b)
Release energy
c)
Release Color
d)
Absorb Color
19.
Balance this equation: H2 + N2 → NH3
a)
H2 + 4N2 → NH3
b)
H2 + 3N2 → 2NH3
c)
3H2 + N2 → 2NH3
d)
2H2 + 2N2 → 2NH3
20.
Which is NOT an example of chemical change?
a)
production of gas.
b)
change in color.
c)
change in size.
d)
transfer of energy.
21.
Which is a Synthesis Reaction?
a)
A + B ----> AB
b)
AB -----> A + B
c)
AB + CD --> AD + CB
d)
A + BC --> B + AC
22.
Is melting an object technically known as a chemical reaction?
a)
Yes
b)
No
23.
As the temperature of a material decreases, the particle moves ______ and their kinetic energy decreases
a)
faster
b)
slower
c)
stays the same
24.
The Kinetic theory states that the higher the temperature, the faster the
a)
particles move in a substance
b)
bonds between atoms break down
c)
molecules of gas rush together
d)
lighter particles within a substance clump together
25.
Chemical reactions that absorb energy are known as ________________________.
a)
Endothermic
b)
Exothermic
c)
Boring
d)
Explosive
26.
This is a measure of the average kinetic energy of the particles in an object.
a)
temperature
b)
thermal expansion
c)
electricity
d)
sound
27.
What is the name of Ca(NO3)2
a)
calcium nitrite
b)
calcium II nitrate
c)
calcium nitrate
d)
carbon nitrate
28.
Al+3 combines with (PO4)-3 to make the following compound
a)
Ai(PO4)
b)
Al(PO4)
c)
Al(PO4)3
d)
Ai(SO)7⊕⌋
29.
Cu+combines with O-2 to form
a)
Cu2O
b)
Cu2O2
c)
Cu+2O
d)
CU+1O3
30.
Fe+3 combines with S-2 to form
a)
Fe+4(S)=3
b)
Fe2S4
c)
Fe2S3
d)
Fe3S2
31.
Name MgF2
a)
magnesium fluoride
b)
manganese Phosphide
c)
magnesium(III) fluoride
d)
magnesium fluoride(II)
32.
A covalent compound made of one sulfur and two oxygen atoms would be named
a)
sulfur dioxide.
b)
sulfur oxide.
c)
disulfur oxide.
d)
sulfide oxygen.
33.
P2O5
a)
Phosphorus Oxide
b)
Pentaphosphorus Dioxide
c)
Diphosphorous pentoxide
d)
Phosphoric Oxygen
34.
Disulfur trioxide
a)
S3O2
b)
SO
c)
S2O3
d)
S2O
35.
Which is not a diatomic molecule?
a)
H2
b)
F2
c)
Cl2
d)
Fe2
36.
AB + CD --> AD + CB is the form for which type of reaction
a)
Double replacement
b)
Single replacement
c)
Comustion
d)
Synthesis
37.
Predict the following products in Ag + CuSO4 --> Assume it occurs
a)
Cu + Ag2SO4
b)
SO4 + Ag
c)
Cu2 + AgSO4
38.
Ionic compounds are made from a _______ + _________
a)
metal + metal
b)
metal + nonmetal
c)
nonmetal + nonmetal
d)
none of the above
39.
What is the correct name for Fe(NO3)3
a)
iron (III) nitrite
b)
iron nitrite
c)
iron (III) nitrate
d)
sulfur hydroxide
40.
Is B4S5 ionic or covalent?
a)
covalent
b)
ionic
41.
What is the charge of the metal in sodium chloride
a)
+1
b)
+2
c)
+3
d)
-1
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