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WorksheetsIPC Semester Exam Review Unit 4
Total questions: 18
Worksheet time: 9mins
Name
Class
Date
1.
Which of the following is an example of a chemical change?
a)
melting a stick of butter
b)
dissolving salt in water
c)
using magnesium to displace hydrogen gas from water
d)
none of these
2.
Consider the chemical equation CH4 + 2 O2 --> CO2 + 2 H2O. In this equation, CH4 is a
a)
product
b)
reactant
c)
displacement
d)
none of these
3.
During an exothermic reaction, what happens to energy in relation to the surroundings?
a)
mixed with the surroundings
b)
released to the surroundings
c)
absorbed from the surroundings
d)
none of these
4.
Which generalized equation represents a double displacement reaction?
a)
A + BC --> AC + B
b)
AC + BD --> AD + BC
c)
AB --> A + B
d)
none of these
5.
What type of reaction is the equation C + O2 --> CO2
a)
decomposition
b)
single displacement
c)
synthesis
d)
none of these
6.
What type of reaction is the equation NaCl --> Na + Cl?
a)
decomposition
b)
single displacement
c)
synthesis
d)
none of these
7.
According to the law of conservation of energy, the total amount of energy in the universe is
a)
increasing
b)
decreasing
c)
constant
d)
none of these
8.
In an exothermic chemical reaction, the energy gained by the surroundings must be what compared to the energy lost by the reaction?
a)
equal to
b)
greater than
c)
less than
d)
none of these
9.
When chemical bonds are broken, energy is
a)
absorbed
b)
released
c)
not needed
d)
none of these
10.
How many total atoms of nitrogen (N) are represented by the chemical formula 3 NH4?
a)
1
b)
3
c)
12
d)
none of these
11.
How many total atoms of hydrogen (H) are represented by the chemical formula 3 NH4?
a)
1
b)
4
c)
12
d)
none of these
12.
How many total atoms of sulfur (S) are represented by the chemical formula 2 SO2?
a)
1
b)
2
c)
4
d)
none of these
13.
An alpha particle is made up of two protons and two neutrons.
a)
True
b)
False
14.
Radioactive decay takes place when an atomic nucleus spontaneously emits particles and/or high energy radiation.
a)
True
b)
False
15.
Isotopes of uranium are the most common fuel used in nuclear power plants.
a)
True
b)
False
16.
Nuclear fusion is easily used to produce commercial nuclear power.
a)
True
b)
False
17.
Nuclear power plants run by using ores of plutonium for fuel.
a)
True
b)
False
18.
Nuclear fission is used in nuclear power plants.
a)
True
b)
False
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