Chemistry Unit Review Question Preview (ID: 55934)
All Chemistry 7th Grade Standards.
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Which of the following is NOT a property of an acid?
a) Bitter
b) Sour
c) Burns skin
d) Turns Blue litmus paper red
Which of the following is NOT a property of a Base?
a) Sour
b) Bitter
c) Slippery
d) Turns red litmus paper Blue
What is the range of the pH scale?
a) 0-14
b) 1-14
c) 3-9
d) unlimited
What is the pH range of a base?
a) 8-14
b) 1-14
c) 0-6
d) 7
What is the pH range of an acid?
a) 0-6
b) 8-14
c) 0-14
d) 7
What is the pH range of a neutral?
a) 7
b) 0-14
c) 0-6
d) 8-14
The formula for density is Mass/Volume. If the mass is 5g and volume is 25cm3, what is the density?
a) 0.2g/cm3
b) 2g/cm3
c) 125g/cm3
d) 2.2g/cm3
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) -8mL
d) 80mL
If the mass of an object is 12g and the volume is 218cm3, what is the density?
a) 0.055g/cm3
b) 220g/cm3
c) 7g/cm3
d) 0.055g/mL
If an object has a density of 1.3g/mL, will it sink or float?
a) Sink
b) Float
c)
d)
Which of the following is NOT a physical property?
a) Ability to burn
b) Color
c) Boiling point
d) Density
Which of the following is NOT a chemical change?
a) Melting point
b) Ability to rust
c) Combustion
d) Ability to burn
What is malleability?
a) Hammered into sheets
b) Pulled into wires
c) Brittle
d) Ductile
What is ductile?
a) Ability to be pulled into wires
b) hammered into sheets
c) malleability
d) brittle
Which of the following is evidence that a CHEMICAL CHANGE has occurred?
a) A solid was formed from two liquids
b) cutting paper
c) expected color change
d) expected temperature change
Which of the following is evidence that a PHYSICAL change has occurred?
a) Ice cream melting on a hot summer day
b) metal rusting
c) baking a cake
d) campfire burning
Which of the following equations IS balanced?
a) 2Na + 2H2O --- 2NaOH + H2
b) CH4 + O2 --- CO2 + 2H2O
c) H2 + O2 --- H2O
d) C6H12O6 ---- H2O + O2
Which substances are considered pure substances?
a) Elements and Compounds
b) Elements
c) Compounds
d) Elements, Compounds, and Mixtures
What are the two different types of mixtures?
a) Heterogeneous and Homogeneous
b) Mixed and unmixed
c) Heterogeneous
d) Homogeneous
How do you determine the number of elements in a compound?
a) Count the uppercase letters
b) Count the lowercase letters
c) Add up all the numbers
d) You cannot
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