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Chemistry Unit Review
Test Description: All Chemistry 7th grade standards
Instructions: Answer all questions to get your test result.
1) Which of the following is NOT a property of an acid?
A
Turns Blue litmus paper red
B
Burns skin
C
Bitter
D
Sour
2) Which of the following is NOT a property of a Base?
A
Turns red litmus paper Blue
B
Slippery
C
Sour
D
Bitter
3) What is the range of the pH scale?
A
3-9
B
0-14
C
unlimited
D
1-14
4) What is the pH range of a base?
A
7
B
1-14
C
0-6
D
8-14
5) What is the pH range of an acid?
A
0-6
B
0-14
C
7
D
8-14
6) What is the pH range of a neutral?
A
0-14
B
7
C
0-6
D
8-14
7) The formula for density is Mass/Volume. If the mass is 5g and volume is 25cm3, what is the density?
A
2g/cm3
B
0.2g/cm3
C
125g/cm3
D
2.2g/cm3
8) If the initial amount of water in a graduated cylinder is 50ml and an object is dropped in and the water rises to 58ml, what is the volume of the object?
A
-8mL
B
108mL
C
80mL
D
8mL
9) If the mass of an object is 12g and the volume is 218cm3, what is the density?
A
220g/cm3
B
7g/cm3
C
0.055g/cm3
D
0.055g/mL
10) If an object has a density of 1.3g/mL, will it sink or float?
A
Float
B
Sink
11) Which of the following is NOT a physical property?
A
Ability to burn
B
Boiling point
C
Color
D
Density
12) Which of the following is NOT a chemical change?
A
Ability to burn
B
Ability to rust
C
Combustion
D
Melting point
13) What is malleability?
A
Pulled into wires
B
Ductile
C
Hammered into sheets
D
Brittle
14) What is ductile?
A
Ability to be pulled into wires
B
hammered into sheets
C
brittle
D
malleability
15) Which of the following is evidence that a CHEMICAL CHANGE has occurred?
A
expected temperature change
B
cutting paper
C
A solid was formed from two liquids
D
expected color change
16) Which of the following is evidence that a PHYSICAL change has occurred?
A
baking a cake
B
campfire burning
C
metal rusting
D
Ice cream melting on a hot summer day
17) Which of the following equations IS balanced?
A
H2 + O2 --- H2O
B
2Na + 2H2O --- 2NaOH + H2
C
C6H12O6 ---- H2O + O2
D
CH4 + O2 --- CO2 + 2H2O
18) Which substances are considered pure substances?
A
Elements, Compounds, and Mixtures
B
Elements and Compounds
C
Compounds
D
Elements
19) What are the two different types of mixtures?
A
Homogeneous
B
Heterogeneous and Homogeneous
C
Mixed and unmixed
D
Heterogeneous
20) How do you determine the number of elements in a compound?
A
Add up all the numbers
B
Count the lowercase letters
C
Count the uppercase letters
D
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