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Intro To Chem Ch 7 Review
Test Description: Intro to Chem Ch 7 review
Instructions: Answer all questions to get your test result.
1) Mixtures can be separated by filtration, evaporation, or ___________.
A
wishing
B
pulling them apart
C
chromatography
D
boiling
2) ____________ is used to separate smaller things from larger things
A
Chromatography
B
Filtration
C
Waving a magic wand
D
Evaporation
3) _________ can be used to separate molecules that evaporate from molecules that don't evaporate.
A
Evaporation
B
Filtration
C
Boiling
D
Dissolvation
4) T/F Chromatography can be used to separate different colors in ink.
A
True
B
False
5) There are __________ states of matter.
A
3
B
2
C
1
D
5
6) The states of matter include:
A
liquid, gas, foam
B
solid, liquid, paper
C
solid and gas only
D
solid, liquid, gas
7) The molecules in a _____are very close together.
A
gas
B
liquid
C
solid
8) The molecules in a _____ are not packed as tightly together, allowing for some movement.
A
solid
B
liquid
C
gas
9) The molecules in a _____ are far apart and move about freely.
A
gas
B
solid
C
liquid
10) The holes in the filter which allow materials to pass through are called _______.
A
Gases
B
Filtrations
C
Colanders
D
Pores
11) A sieve or a colander can be used to _________ items from a mixture.
A
mix
B
fill
C
recover
D
separate
12) __________ cannot be used to separate items of the same size.
A
Filtration
B
Evaporation
C
Smashing atoms
D
Liquefaction
13) This name is given to any substance in which another substance is dissolved.
A
Filter
B
Solvent
C
Solid
D
Titration
14) This is used to separate mixtures by passing a solution over a solid film or powder.
A
Separation
B
Chromatography
C
Inkinism
D
Filtration
15) _____ occurs when a liquid turns into a gas and escapes into the air.
A
Evaporation
B
Filtration
C
Separation
D
Evacuation
16) ______ can be used to separate two or more items of different sizes.
A
Solvent
B
Liquefication
C
Chromatography
D
Filtration
17) In chromatography, ink colors separate, with the fastest moving dyes appearing at the ________ of the test strip.
A
top
B
bottom
C
they remain in the ink solution in the beaker
D
middle
18) When molecules exist in the gaseous state, they _______.
A
move faster
B
move slower
C
move up and down
D
don't move
19) Molecules in a solid state ______.
A
move freely
B
move up and down slowly
C
do not move freely
D
remain solid
20) A separation method to separate sand from rocks could be.
A
filtration
B
evaporation
C
hybridization
*select an answer for all questions
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