WorksheetsChemical Equations Quiz
Total questions: 30
Worksheet time: 15mins
Name
Class
Date
1.
All chemical reactions are redox reactions.
a)
True
b)
False
2.
A bond between a metal and a nonmetal is a(n) ________ bond.
a)
polar covalent
b)
nonpolar covalent
c)
ionic
d)
hydrogen
3.
All of the following are allotropes of carbon EXCEPT:
a)
diamond
b)
graphite
c)
fullerenes
d)
lead
4.
All of the following are examples of alloys EXCEPT:
a)
iron
b)
brass
c)
bronze
d)
steel
5.
Which species is being oxidized?
2H2 + O2 → 2H2O
2H2 + O2 → 2H2O
a)
H2
b)
O2
c)
H2O
d)
none of the above
6.
Which species is being reduced?
2Al + 3CuO → Al2O3 + 3Cu
2Al + 3CuO → Al2O3 + 3Cu
a)
Al
b)
Cu
c)
O
d)
None of the above
7.
What is the oxidation state of nitrogen in the compound LiNO3?
a)
1+
b)
3-
c)
5+
d)
2-
8.
A bond between two nonmetals is usually characterized as:
a)
ionic
b)
polar covalent
c)
nonpolar covalent
d)
polar or nonpolar covalent
9.
Doping is a process used to introduce impurities into:
a)
superconductors
b)
semiconductors
c)
alloys
d)
gold
10.
What metal does U.S. law require a certain proportion of all manufactured to be recycled?
a)
iron
b)
copper
c)
steel
d)
zinc
11.
All of the following are ways to get citizens to recycle EXCEPT:
a)
curbside pick-up
b)
drop-off centers
c)
buy-back centers
d)
repurpose plants
12.
In the following equation, _____ is the oxidizing agent, and ______ is the reducing agent.
Zn + CuCl2 → ZnCl2 + Cu
Zn + CuCl2 → ZnCl2 + Cu
a)
Zn0; Cu2+
b)
Cu2+; Zn0
c)
Zn2+; Cu0
d)
Cu0; Zn2+
13.
The following equation is an example of what type of chemical reaction?
2Cu + O2 → 2CuO
2Cu + O2 → 2CuO
a)
synthesis
b)
decomposition
c)
single displacement
d)
double displacement
14.
The following equation is an example of what type of chemical reaction?
H2SO4 + 2NaOH → Na2SO4 + 2H2O
H2SO4 + 2NaOH → Na2SO4 + 2H2O
a)
combustion
b)
acid-base
c)
decomposition
d)
double displacement
15.
The following equation is an example of what type of chemical reaction?
C3H8 + 5O2 → 3CO2 + 4H2O
C3H8 + 5O2 → 3CO2 + 4H2O
a)
synthesis
b)
decomposition
c)
combustion
d)
double displacement
16.
_______ are different forms of an element that each have distinctly different physical or chemical properties.
a)
Alloys
b)
Allotropes
c)
Isotopes
d)
Recyclables
17.
The molar mass for Ca3(PO4)2 is approximately:
a)
279 g/mol
b)
298 g/mol
c)
310 g/mol
d)
352 g/mol
18.
The compound with the molar mass of 184 g/mol is most likely:
a)
NaCl
b)
MgBr2
c)
KI
d)
Al2O3
19.
The correct, balanced chemical equation for a reaction between zinc metal and iron (III) chloride is:
a)
Zn + FeCl2 → ZnCl + Fe
b)
Zn + FeCl3 → ZnCl2 + Fe
c)
3Zn + 2FeCl2 → 3ZnCl + 2Fe
d)
3Zn + 2FeCl3 → 3ZnCl2 + 2Fe
20.
The correct, balanced chemical equation for a combustion reaction of ethanol (C2H6O) is:
a)
C2H6O + 3O2 → 2CO2 + 3H2O
b)
2C2H6O + 8O → 4CO2 + 6H2O
c)
2C2H6O + 6O2 → 4CO2 + 6H2O
d)
C2H6O + O2 → CO2 + H2O
21.
Redox reactions are concerned with the transfer of __________.
a)
electrons
b)
protons
c)
neutrons
d)
atoms
22.
The correct way to balance the following reaction with coefficients would be:
_H2SO4 + _Ca(OH)2 → _CaSO4 + _H2O
_H2SO4 + _Ca(OH)2 → _CaSO4 + _H2O
a)
1;1;1;2
b)
2;1;1;2
c)
1;3;2;2
d)
2;2;2;4
23.
The percent composition of phosphorous in H3PO4 is:
a)
3%
b)
6%
c)
65%
d)
32%
24.
The scientist that calculated the approximate number of molecules/ atoms in one mole of any substance was:
a)
Newton
b)
Tesla
c)
Avogadro
d)
Einstein
25.
1 mole is exactly equal to:
a)
6.02 x 1023 atoms
b)
2.06 x 1023 atoms
c)
6.02 x 1024 atoms
d)
6.20 x 1023 atoms
26.
In a combustion reaction, one of the reactants is always:
a)
CO2
b)
H2O
c)
O2
d)
CH4
27.
How many grams does 0.75 moles of BaCl2 weigh?
a)
155 g
b)
0.004 g
c)
276 g
d)
350 g
28.
How many moles are in 3.67x1024 molecules of Br2?
a)
6.1 mol
b)
3.2 mol
c)
2.21x1048 mol
d)
0.16 mol
29.
How many grams are in 2.09x1022 molecules of MgCl2?
a)
2,707.6 g
b)
28.8 g
c)
0.035 g
d)
3.26 g
30.
Is the following reaction a redox reaction?
Zn(OH)2 + CuCl2 → ZnCl2 + Cu(OH)2
Zn(OH)2 + CuCl2 → ZnCl2 + Cu(OH)2
a)
Yes
b)
No
100 %
